Jb Weld Exhaust Manifold Stud

This is an original drivers side LH exhaust manifold that is in good condition. Accessories & Audio. I was assembling the long block on an engine stand. had some really awesome welding gear. Regarding the headpipe studs, post a pic so we can see if some really are welded in, but if they are just frozen/siezed, usually you can soak the threads with a penetrating oil like PB Blaster or Kroil or SeaFoam Deep Creep, then get two nuts and use one as a jam nut so you can back the stud out, and if needed use a propane torch to put some. gm forum at Car Dealer Forums; I was reading another older thread on her about someone that used JB Weld on. My mechanic friend said the whole set (intake and exhaust) had to come off so have the gasket set available for it - and be sure to include the exhaust p. Carburetor probably needs a kit, intake\exhaust manifold is good, stator is clean and shows no visible problems. An extractor took out the last pieces of the studs, but the threads were so poor at this point I decided it would be a good idea to start off fresh. Once the sealant dries, it creates a strong and permanent seal, which is stronger than steel. Nice white steam comming up from the engine. In my 240SX, one exhaust stud snapped loosening it. Except the bolt broke off, and apparently it cracked the head as well, and now you can't JB weld the head on the exhaust manifold side. For simply plugging an egr hole in a manifold, it would probably be perfect. Marine Tex epoxy is impervious to oil, fuel, grease, brine and detergents. Fit the manifold onto the exhaust down-pipe by feeding the studs through the holes on the sliding bracket on the pipe. USA made!. Exhaust studs are notorious for freezing up and breaking. and exhaust flange and the three bolts that hold the manifold. From your description I have no idea if this is a problem on one or both of your manifolds, but it might be worth checking. Finally had a chance to get out and look over the block and found a 5" crack on the port side. If I am unable to get the manifold resurfaced, then I need to use jb weld to seal that port, since the exhaust temp can reach in excess of 1800 degrees on those two cylinders, literally burning up even stainless gaskets within an hour to three hours. low pressure exhaust leaks from the exhaust manifold. 17410-50490 pipe assy exhaust 17450-50131 pipe assy exhaust all new studs, nuts, gaskets 17510-50050 manifold assy 17140-50060 manifold assy so they replaced both manifolds, y pipe assy and pipe from y-pipe to muffler assy. Replace" this stud. 1) Can I fix it with JB Weld? 2) If I have to put in a heli coil can I drill the manifold hole larger and then drill out the hole and sink in the helicoil? I really dont want to have to take this sucker apart again. Galvanized steel welds similar to uncoated carbon steel when properly prepped. Exhaust Manifold Catalytic Converter Deletion Project Description This write up will walk you through removing a major restriction on the I4 and I5 exhaust system. Open up the exhaust flow on your new Tundra with a powerful, sound with JBA headers and exhaust. But I am wondering what kind of nuts I should use. What is the best kind to use, JB Weld is good to 600F, how hot do think an exhaust manifold on a tractor gets? Thanks. The proper fix for this problem (aside from replacing a perfectly good stock muffler) is to weld a new piece of pipe with flange onto a non-rusted section of the muffler pipe and then attach it to the flange coming from the resonator. Some heads, such as Ford 2. I have a 1999 f150 with a 5. The bolt hole is stripped (I overtorqued it when putting everything back together after an intake manifold gasket repair), and I intended to fix it with a helicoil. They make specialized welding rods and such that work to repair them, but they're expensive. It can be sanded, drilled, sawed, threaded and painted. I modified my manifold much as Haverty did: remove the butterflies, chop up the throttle shaft so it can be used to plug the holes between the runners, then put the throttle shaft slugs back into place with JB Weld. Learn about this problem, why it occurs, and how to fix it. best way it to pull manifold off and try and get broken bolts out. (read recently that alcohol pre JB Weld is not good. Don't know how that'd work with grungy ol exhaust manifold studs though. This NAPA Advantage repair clamp creates a seal without needing to extract the broken stud. Between the threads cutting into the old bolt and the JB weld it would never come out and would provide plenty retention for the exhaust. +2 on the JB weld I had the leak on my 95 GTX and took the pipe off and had all of the plugs welded. It was the lower stud, so I can easily access it. Exhaust Manifold bolt extraction in dextron/acetone will work into the threads and you should be able to use a scribe/awl and pull out the remaining stud material. You can patch an exhaust and even reconnect broken exhaust pipes with some beer cans and some hose clamps. Worst case the stud broke off. Of course, the one on the front drivers side of the engine broke in half. The heat shield works by just maintaining an air gap between the exhaust and the heat shield. After it dries take off the manifold and take a die grinder and clean the epoxy that might squish into the port. I was assembling the long block on an engine stand. 4) I threaded in the stud until it felt just snug, not wanting to strip any more head threads. Would JB weld stand up to the heat?. The stroke on a CT90 is 45. JB Weld to the rescue. another possibility is to get new gaskets, put 2 together and coat. Someone else said that JB Weld is rated to 600 degrees F. It may never leak. Also customers can now request custom packaging when they place their orders. Autolink online auto parts offers a large range of aftermarket spare parts for all makes & models including 4wd's & commercial vehicles. But even that. I drilled crooked, thought I could do it without a center punch. I basically had open headers for the entire 3 hour drive back home. and no room to get drill in there to try and drill broken studs out. I've never tried the letting it cool one. I have a high degree of confidence in JB Weld, and have used it in all manner of applications. Strongest in the market. J-B Weld 37901 Extreme After 230k miles I ended up with a crack in the exhaust manifold of my Accord. Buy online, pick up in-store in 30 minutes. I've used JB Weld on muffler studs several times on trimmers and chainsaws and it always works. But even that. I let it set up for 24 hours. At headbolts. Block Drain Plugs Location. I think I'm going to try to repair the stud hole in the head and not mess with pulling the head if at all possible. The head is a week link on the 22r motors because they have thin passages and if the coolant gets weak you can find a porosity in the aluminum. I just got an exhaust manifold gasket for my 95 Silverado with a 5. Intake Manifold and Throttle Body. If you didn't have access to a machine shop for help you could pick up a hardened 9/16 threaded stud, coat the threads in JB weld, double nut one end and then thread the stud into the hold you drilled. I torque the studs to the heads and use JB-Weld on the threads to insure a good seal. I would possibly try the JB Weld exhaust manifold crack repair with a low expectation that it will work. From: r4X0r | #007 If it broke because it's rusted, you can't weld it. MERCEDES BENZ 124 124 Re 300TE crack in exhaust manifold where meets with egr valve. We specialize in exchange and custom cylinder head and cylinder block welding, reconditioning and repair, both in aluminum and cast iron, gas and diesel applications. If not, I have some in stock. April 28th, 2011 at 1:10 pm; My best ever JB Weld repair was on a now-ex girlfriend’s Corona. Save on Walker Flange Repair Kit 36132 at Advance Auto Parts. 4) I threaded in the stud until it felt just snug, not wanting to strip any more head threads. Worst case the stud broke off. Installation 1) Thread the studs into the manifold flange (where the manifold meets the exhaust down pipe). Rather than redoing the weld, perhaps on a fresh, heavier flange, Kohler sealed the 1/8" gap using JB Weld or something similar applied to the manifold, and then to make sure, they installed two gaskets. Exhaust Manifold Removal Questions a member used high temp JB Weld i think to patch the crack up. [Archive] Exhaust Manifold Cracking Exhaust Mods. First remove the manifolds and see if the drilled through the old studs and used smaller bolts and if the holes can be cleaned out with a drill and a tap. [Inquiry:] B230F - I want to flush the cooling system, but the only block drain I see is a threaded male plug on the RH side of the block (kinda high) below exhaust manifold runners 1 and 2. The 318 had exhaust manifold studs on all four corners, which made it difficult to do an engine swap with headers already lying in the engine bay from the 360, so I pulled the studs out. Drill and tap it for a slightly oversized stud to ensure good thread engagement. So i broke off one of my exhaust manifold studs today and tried to drill it out. Then the gasket is put in. Except the bolt broke off, and apparently it cracked the head as well, and now you can't JB weld the head on the exhaust manifold side. Most times just the heat from the weld will loosen them up but the cooling does make sense. I put thread sealer on the stud and reassembled with a new stud. Studs in the exhaust manifold bolted to the flange on. This all became obvious. What happened is, I had a /6 with a broken-off exhaust stud at the very back of the head. I'm thinking about pulling the exhaust studs out of the head to measure if the head is warped. Well of course over time the studs had pretty much welded themselves in and after trying many options, the only one left to was to drill them out. If you need to mount an O2 sensor and don't know how to weld or can't find someone who can, this is a permanent solution that replaces a welded in O2 bung. That's excellent feedback. Put it all together and it was shooting coolant out of a new void the tanking probably opened up in-between the exhaust ports for #1 and #2, just above the exhaust manifold. I'll report back here how it worked. And it's a small hole (1/16 drill bit). black iron pipe thread plug then j b weld, then a 20gauge sheetmetal block off plate. Then JB Weld on stud threads. The rods are a bit expensive and the welding is time consuming. I’ll be using Quick Steel to repair a cracked exhaust manifold. Fastenal is the largest fastener distributor in North America. I used it on my 97 obs 7. from the look of it the exhaust manifold is rusted and has a good chance of some bolts breaking off. AEM's No-Weld O2 Sensor Mounts enable users to mount an O2 sensor without having to weld a sensor bung onto the exhaust. THE ORIGINAL COLD WELD: JB Weld was developed as an alternative to torch welding. Get yours online today and pick up in store. 6l exhaust manifold leak, snapped bolts $325 to remove the broken ones, and re-stud all 8 with a new manifold gasket. Well as you can guess I drilled a little too far. Coating the threads with a healthy dose of JB Weld and letting it set up for 24 hours may help but I doubt it would make for a permanent fix. I put thread sealer on the stud and reassembled with a new stud. R where the studs go, 2 have weld repair (see pictures). do that with both sides and it should almost seal without a gasket. but I was wondering if I could use a product like "Mighty Putty" (that I've seen in infomercials, www. It was the lower stud, so I can easily access it. They are rusted so bad the socket will not grab them. Price was $15. Get the best deal for Metal Car and Truck Gaskets from the largest online selection at eBay. We are here to help. DescriptionAn extreme temperature, silicone sealant ideal for use in hot mechanical assemblies and vehicle areas; 85g tube of ready to use sealant, resistant to cracking shrinking, and petroleum; Room temperature vulcanised material sets in 1 hour and cures to a red colour. Used it many times, even on a crack in an exhaust manifold. I have had a 425b and now a 400a, both have had studs replaced, more than once. make a manifold by tracing the stock pipe. I've never tried the letting it cool one. They are supposed to be 7MM studs. Can I just JB weld this thing and call it done? It definitely will not hold up very long on a cracked exhaust manifold. If possible, the cleanest fix for a. In either case, I'd also cover the outside of the crack with a coat of JB Weld. Learn about this problem, why it occurs, and how to fix it. option 3 duct tape just like 5 rolls its a great bubba fix for anything. Exhaust Manifold Removal Questions a member used high temp JB Weld i think to patch the crack up. The stud is new, so the manifold threads are shot. J-B Weld Hi-Temp Red Silicone Gasket Maker & Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material, designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550º F or 650º F intermittent might exist. But I am wondering what kind of nuts I should use. Any suggestions are appreciated. Ive since trashed the old exhaust and replaced it with better stuff that fits better, but that jb weld got me out of a cinch when i really needed my car. I will be pulling the exhaust manifold and examining exactly where the oil is seeping out. This kit is designed to facilitate the installation of a 7/16″ repair stud through a head or manifold without having to remove the head or manifold from the engine. 5" long (hairline but through-and-through)-- can it be fixed? Heard you can not successfullly weld cast. Maybe they can weld new studs. With the pressure of the exhaust and the heat, I would bet it will not work, or even last very long, if it does. new stud and you should be in have used JB weld so as to tighten loose threads but -- JB weld used on very hot things -- not to sure one can take a slightly stripped item put a little JB in the loose now hole wrap some thread that is wet with epoxy around bolt threads put it in -- not very tight -- epoxy will harden it's what we call a cheap fix !!. Overall length is a little shorter than the 675-092 standard replacement stud, but that's of no consequence. Audi 4000 / Coupe GT Discussion - Broken exhaust manifold studs(and some questions) - If you've had to deal with it before, I'm sure you read the thread title and cringed. Designed to be effective in extreme environments, once it sets, it creates a permanent bond stronger than steel. Clean the area real well with brake cleaner, put a little epoxy on it, put some wax paper over it and bolt down the manifold. Thats a 4 cylinder in the picture so not sure how many bolts hold on tbe exhaust manifold possibly just 2 on each side. Which Coolant to Use? See the discussion on Coolant Recommendations. 9L inline 6 engine. Using new bolts/studs/locking nuts is required in this location but they must fit properly to avoid creating new issues. Could the installer have left out clamps? I don't know. : The old clunker's exhaust was blowing a bit, so I sealed it. Zoro’s website is easy to navigate and to compare with other manufacturers. First remove the manifolds and see if the drilled through the old studs and used smaller bolts and if the holes can be cleaned out with a drill and a tap. My exhaust studs on my engine keeps coming loose, its the second time after i tightened it. I'm getting some very minor leaking from all 3 of those. Frankly, at that point, I just said "screw it" as just tightened them down. I have a Montero Sport 2000 that's leaking oil thru the exhaust manifold studs. Im happy, and I call that being fiscally responsible and efficient. Due to the small cross sections of a manifold, it can be easily welded with Ni-rod or cast rods with little pre heat or post heat, so I will go with the cold method. I would consider living with it but unfortunately it taps into the water jacket so I really need to have it fixed or at least sealed. threadlocker offers 30% more product than other similar products. More load, more heat out the exhaust. Welded manifolds cracked again quickly in BOTH of my personal experiences. JB Weld (1) Land Rover (20) Lucas Exhaust Manifold Flange Stud Land Rover Series 2 2a and 3 568664. It's still holding up after a half dozen uses. if your lucky some of the part will still be sticking out of the head and you can heat them up with a torch and unscrew them. As a point of technique, the normal way to screw in a stud is to install two nuts, and jam them tightly together. "You know what you're going to have to do, don't you?", said Kitewife. The thru hole in the 66 intake manifold was intended for a smaller, 5/16-18 bolt. So, tried to JBWeld a stud into place, to tighten down the exhaust manifold. EXD offers an outstanding delivery program to all of our customers & several freight options for those items you need in a hurry. My cabby is turboed and has a bad intake manifold bolt. We are here to help. It sucked and is gonna suck even more to replace lol. Mixed at a ratio of 1:1, it forms a permanent bond and can be shaped, tapped, filed, sanded and drilled after curing. so my question is has anyone been able to get the stud out without pulling the head. Find a welding shop that can stick weld engine block cracks, that special rod I believe has a Nickle base rod combination you need to have it welded over then stitched across for strength. The missing bushings on the manifold shaft you could fix. Would jb weld hold up well enough for this spot. Another symptom can be a ticking sound from the engine. I know that this is going to sound kind of dumb. 4 millimeters longer of a stroke. its the oh **** glue. You could maybe even gob enough JB Weld in that crack to keep it from leaking for a little while, but with that broken ear I doubt you could ever get the exhaust pipe not to leak right there. It isn't perfect but it is simple. I have no idea how the coolant can get to that location, although it is very close to the water neck area (the triange shaped area of the head). I had taken the head to a machine shop for a tank, valve reseat, and a shave. It is not my d. Many of it's parts are original. So I started putting my intake and exhaust manifold onto my freshly rebuilt head. At headbolts. Gotta try it on a clean one though. The most important part of welding the manifold is the preparation work; a well-prepped welding job goes very smoothly. One of my guys was installing helicoils on a 4. I've been successful removing broken studs from manifolds by welding on a nut on the piece of stud that was still sticking out but this one was flushed, I was forced to drill it out. I made about three applications of JB Weld, filing it flat in between applications until I was satisfied the surface was smooth and flat. So now I am thinking epoxy. After it dries take off the manifold and take a die grinder and clean the epoxy that might squish into the port. still good 40 years later. If not, i'll get the proper one. so my question is has anyone been able to get the stud out without pulling the head. An alternative is to remove the shuttervalve and use JB Weld or Devcon to fill the resulting holes. I removed the exhaust manifold, put a machinist's straight edge (good to four places beyond the decimal. I'm sure that if I filed the manifold down to be even, I would have to substantially file the ears down to make everything join properly. Finally, my turn to ask a question!I had a rather severe exhaust manifold leak (very rear opening) for a bit and finally decided to work on it. and trying to drill them out usually. exhaust manifold leak Early V8 (1932-53) Sponsored Links (Register now to hide all advertisements). Was going make my own thread about this issue, I too tried JB weld, but it stopped holding after a while. Guys my head gasket was recently done and they did a great job. After pulling off the exhaust manifold, I noticed that there was part of an easy out broken off inside the stud hole and NOT the stud itself. Welding cast is sort of tricky to do "right", however I did a cast manifold off a Toyota for a friend. Many of it's parts are original. NISSAN MAXIMA How to replace an exhaust manifold Hi I would like to replac the rear exhaust manifold because of leak. It is a rare occasion that a broken stud or bolt in a cast iron exhaust manifold comes out on the first try. As an alternative, you can tack weld the flapper in the open position (with the plate installed) but I prefer to cut it out, which is sort of the whole point of removing the turbos in the first place. "Fix it?""No, write an. (Not JB Weld) VersaChem's exhaust manifold repair, or ThermoSteel, is said to be good to 2000 degrees. Nothing worked on breaking it loose so I had no choice but to cut it off to remove the manifold and then drill it out. The bolt hole is stripped (I overtorqued it when putting everything back together after an intake manifold gasket repair), and I intended to fix it with a helicoil. Well, next time someone searches, hopefully this video will show up and help someone in a jam. mightyputty. You can simply take a washer and a bolt of a slightly larger size and tack weld it to the bolt body. Any suggestions are appreciated. I have read Barneys take on welding a cracked stud hole/flange but what is the consenses on a crack in this position, is this a do-able repair. How to Fix a Broken Exhaust Pipe. The thru hole in the 66 intake manifold was intended for a smaller, 5/16-18 bolt. So long story short i'm changing my exhaust manifold when I come across a ridiculously stubborn stud. Tool Discounter, Offers great prices on automotive diagnostic tools, auto tools, scan tools, hand tools, freon recover shop equipment with weekly special items at deep discounts. First remove the manifolds and see if the drilled through the old studs and used smaller bolts and if the holes can be cleaned out with a drill and a tap. But, the fuel inlet looks to have been cross threaded. 5 months And deacon comes is Alum mix and steel mix and I believe cast iron mix. Can I mix up some J-B Weld and fill the hole with it? I've used J-B Weld before successfully, but never inside the water jacket. 98% of products ordered ship from stock and deliver same or next day. I would suggest replacing the exhaust manifold with the stock replacement manifold available from the dealer for $186. another possibility is to get new gaskets, put 2 together and coat. Bill, Thanks for the warning and the tip on using JB Weld. will jb weld work or should i try to go though all the hassle of replacing the exhaust manifold gaskets. One of the reasons why is that Toyota spent the time to engineer it with parts that actually last. They are not connected to the exhaust via clamps, which is kind of strange. After about 10min. 5L “Iron Duke” heads, the GM 250 six-cylinder head with an integral exhaust manifold and 1987 and later Chevy small block V8 “Vortex” heads. I've had to heat the whole works red on occasion to get the stud to move. If you want to get going quickly and cheaply, I like the JB Weld idea. From your description I have no idea if this is a problem on one or both of your manifolds, but it might be worth checking. Will JB weld hold up on stock exhaust manifold cracks? - posted in Virtual Mechanic: I found a exhaust manifold better than mine for $10. Don't think it's an exhaust hanger issue; trans hanger was intact on my car, and it had 100% original dated exhaust parts on it. 8 15 15 8mm 93635A164. I'm thinking about pulling the exhaust studs out of the head to measure if the head is warped. You can call it whatever youd like. First by installing the manifold coolant system. black iron pipe thread plug then j b weld, then a 20gauge sheetmetal block off plate. Some heads, such as Ford 2. You guested it. and trying to drill them out usually. Details:- 81 Illingworth Close, Mitcham, Surrey, CR4 3QF, UK Tel 020 8648 3866 020 8648 3866 (We stock all products). If you have a tig welder, you are in luck. and no room to get drill in there to try and drill broken studs out. They make specialized welding rods and such that work to repair them, but they're expensive. 1999 Honda Civic I have a crack in the exhaust manifold. It isn’t perfect but it is simple. So I retapped the treads. I'm sure that if I filed the manifold down to be even, I would have to substantially file the ears down to make everything join properly. You can get a stepped stud that's got bigger threads on one end and smaller on the other, Dorman #675-097. These studs go into the water jackets. Recently my truck started to develop an exhaust leak from the manifold gasket. Any suggestions on epoxy if JB weld is not up to snuff? Pammy. JB weld can't take the heat of an exhaust port. I got my old Ford manifold out and started checking for differences. Don't know how that'd work with grungy ol exhaust manifold studs though. 5 foot long chromed pipe hanging out). The have several formulations including one for. They're still in place to this day, and no one looks at my car close enough to see 'em. Ask For Price ; Mobile Exhaust Manifold Repair Services and Cost in. i tapped em out to m12x1. What can I - Answered by a verified Auto Mechanic. The intake manifold looks like a snake, you can even see the tight bends just by popping your hood. The task can be done with just about any welder meant for steel. i was advised to try to use jb weld to seal my exhaust manifold leak. Its a 3/8 pipe thread reduced to 1/4 pipe. I’ll be using Quick Steel to repair a cracked exhaust manifold JB Weld Extreme Heat REVIEW on repairing Exhaust Manifold. One of my exhaust studs stripped out. So call local stores and no store in town had a motor mount. So now I am thinking epoxy. Your mechanic may charge you an additional fee, depending on the severity of the situation. They are supposed to be 7MM studs. i'm very mechanicaly inclined, do all my own repairs. I would possibly try the JB Weld exhaust manifold crack repair with a low expectation that it will work. On the bottom rear of the manifold you can see where I flattened the vacuum port and covered with JB weld to gain more clearance for the heater hoses coming out the firewall. clean and weld (NO JB WELD!!) that hole shut. So I drilled and tapped them both for 3/8 inch bolts and made my own huge studs. Adrian told me the heads he received had: valve seats that were not the correct hardness. Then, use a compound like JB Weld to fill any tiny holes left over. The most important part of welding the manifold is the preparation work; a well-prepped welding job goes very smoothly. I believe they have studs from the factory but mine came with bolts. There is a cast iron flux you use. Next, I hooked up the vacuum (suck side now) to the exhaust port, after installation of the dividers. 1) Can I fix it with JB Weld? 2) If I have to put in a heli coil can I drill the manifold hole larger and then drill out the hole and sink in the helicoil? I really dont want to have to take this sucker apart again. Continue to run the solder into the crack of the exhaust manifold until you have filled it completely. Over time, the constant heating and cooling of the metal causes the manifold to distort and warp causing gasket leaks. new stud and you should be in have used JB weld so as to tighten loose threads but -- JB weld used on very hot things -- not to sure one can take a slightly stripped item put a little JB in the loose now hole wrap some thread that is wet with epoxy around bolt threads put it in -- not very tight -- epoxy will harden it's what we call a cheap fix !!. When you it back together, use stainless steel studs and locknuts. 0L Engine On Escalade Avalanche Silverado Pickup Tahoe Express Van Denali Sierra Pickup Savana Yukon Hummer H2 (See APDTY-028253 For Other Side). I’ve used JB Weld original to repair a metal radiator and it worked fine for many years of service. I use red Loctite on the rocker stud threads. Intake Manifold and Throttle Body. Also, I would have suspected from your description that the exhaust manifold has some broken studs or the connection pipe between the manifolds is misaligned and leaking, but not the timing. Allow the JB Weld to cure for 24 hrs and refill the oil. Good catch! I hope the stud is the problem. A friend said to try to grind a groove and fill with JB Weld and grind it down. The exhaust manifold was painted with high-temperature exhaust coating from Eastwood left over from my Porsche. These should be OK. Please, let this be a relatively easy fix. I cannot tell if I'm idling or off, have to look at the tach. Exhaust manifold gaskets, lengthy, detailed with pictures at the end. Be careful when tightening, do only a nice easy snug low effort tightening. OK, but will it work on an exhaust manifold? I have one of the 3 studs that refuse to thread into the manifold anymore. I am considering using JB weld to try a quick fix. The rocker arm nut thread size is 7/16-20. One of the rocker arm studs has come out of the cylinder head closest to the firewall on my 97 Buick Century 3. AEM's No-Weld O2 Sensor Mounts enable users to mount an O2 sensor without having to weld a sensor bung onto the exhaust. What is the best kind to use, JB Weld is good to 600F, how hot do think an exhaust manifold on a tractor gets? Thanks. You can also cut off the flared "bell" connection end that the down pipe attaches to and have the muffler shop weld a 2-bolt flange in place. I dabbed some in the hole with a small screwdriver and on the threads of the stud. It also makes clean-up, welding in fresh material & repair more of a pain since it doesn't clean off as easily as the normal cruddy/grimey parts do. (save for a possible JB Weld. So the exhaust is fixed. when i pulled the exhaust shrould after i bought the truck, there were 3 studs holding the manifold on out of 7(it's a 20R) and 1 of those was about to fall out i think i got the holes crooked after tapping, took a 5/8" drill to get things right on the manifold. The weld repair can be done hot, with pre heating and cooling slowly, or it can be done cold. Buy online, pick up in-store in 30 minutes. Alum Creek test drive # 1.