Messages . I don't think J-B Weld can handle the heat -- especially if it's at the top of the manifold. J-B Weld HighHeat is designed for DIY repairs on exhaust manifolds, tail pipes, mufflers, engine blocks, duct work and other various high temperature projects. Performance Fuel Tank Sending Units and Components Fuel Pumps & Tanks Fuel Tanks Hardware Carburetor Parts Intake Manifold Hardware Intake Manifolds Fuel Tanks . The heater hose fitting on my aluminum intake manifold split and was leaking. I've been wanting a MIG for . Exhaust Manifolds; Tail Pipes; Mufflers; Engine Blocks; Use On. It works well on steel, iron, copper, stainless steel, and most other metals that endure high heat. ), or should I weld a permanent repair in the casting? 6. Posted: Mon Mar 18, 2013 6:20 pm Post subject: Re: Will JB Weld work on an exhaust manifold? 1 - 6 of 6 Posts. Can You Weld A Cast Iron Exhaust Manifold? JB has it's place, but this is NOT one! Feb 28, 2006. you can helicoil it while the head is stil on the block, in the truck. i am going to have a local shop here helicoil my first and last studs. Might want to try metal putty instead of JB though. These have been used for years to repair cylinder heads. But jb weld can not be used on the exhaust when the damage is so deep that only repairing exhaust parts will solve the problem. Can you use JB-Weld to Repair Exhaust pipes? J-B Weld Extreme Heat High Temperature Resistant Metallic Paste is formulated to allow for repairs to iron, steel and metal in high temperature environments (1000F / 538C). Like i said, this is only a temporary fix, im not looking to jerry rig it permanently. If . Join Date: Aug 2011; Posts: 18449; Share Tweet #7. HighHeat is able to withstand continuous heat up to 450oF (232oC) and intermittent heat of 500oF (260oC). since i don't have a welder at home, i'd just replace it with a good piece. OP..spend the 10 bucks..follow the prep . Super Moderator. Product information I even used it on the thermostat housing on an old beater Ranger I had when one of the bolts broke off in the intake manifold. Posted: 11/27/2012 7:29:40 AM EDT. If your friend's ultimate goal is to fill the engine with water and destroy it, JB Weld or something similar is an excellent choice. MCX Exhaust Manifold Repair 01-14-2014, 04:49 PM. It is great for repairing cracks, small gaps, seam connections or holes in exhaust manifolds . The holes and cracks of the exhaust system can be effectively repaired by the high heat resistant jb weld ExtremeHeat adhesive. i'd be putting a new one on it, or getting a die grinder, opening up the crack, and welding it back up. A little JB Weld and some gasket maker on the threads solved this problem. This appears to be common only to 1931-32 series 60. The manifold is GM# 1248714 from group 3.645, the casting number is 1248702. Some people get nervous around trying to tackle the job themselves but doing so will save you some money and it isn't as difficult as it may look. You must remove the exhaust manifold and SCRUPULOUSLY clean the crack and surrounding area down to clean, bare metal. if i was going to remove the manifold, i sure wouldn't be jb welding it. riverjet502 Petty Officer 2nd Class Joined Dec 28, 2006 Messages 116 Aug 17, 2007 Depending on the make and model of your vehicle, there will be either two or three of these. This product is water based, non-flammable and contains no solvents or Volatile Organic Compounds (VOCs). I used JB Weld on an aluminum cylinder head that held for about 2 years but does not get that hot.The POR 15 people make a FIRE SEAL 2000 product to repair cast iron manifolds but I have no experience with it 1-800-457-6715 for a dealer. JB Weld is ideal for use to fix this crack.in this case. This product has a tensile of 3960 PSI that cures to a firm bond in one to two hours after being applied. JB weld is compatible with cast iron. Re: JB Weld for Exhaust manifold? The number for an exhaust manifold repair cost is an average of between $570- $900, with the labor taking up the majority of this price at between $400 and $550 of that, and the ports running you between $130 and $340 for the total cracked exhaust manifold repair cost. Remove the wheel and tire and then the inner fender liner to gain access to the exhaust manifolds. Exhaustweld; Repair Wrap; 2 Inch X 72 Inch; ExhaustWeld Total Exhaust Repair Wrap is a high strength fiberglass wrap, impregnated with a specially formulated resin for high temperature resistant repairs. The manifold could even crack and cause a leak and this needs replacing the entire manif. (Not JB Weld) VersaChem's exhaust manifold repair, or ThermoSteel, is said to be good to 2000 degrees. Versatile & Dependable: Ideal For Repair Work On : Exhaust Manifolds, Pipe Connections, Mufflers, Catalytic Converters, Outdoor Grills, Fire Boxes, Gas And Commercial Furnaces And Water Heaters. In which case, JB Weld would not work for that particular repair application. 01-14-2014, 09:25 PM. Working with J-B WELD is quick, easy, and convenient -- and saves you time, work, and money! its just gonna crack again unless you can weld it from the inside too which is a waste of time for the cheap ass price of a . It's not ideal to use RTV to fill in the leak. CURE AND SET TIME: After kneading the two part formula together by hand, HighHeat takes 1 hour to set and cures in 8 hours. they said if i take off the exhaust manifold and put it back on after, they will do the job in the truck for $60. Cures with or without heat to repair, seal and insulate the exhaust system. In 15-24 hours, a complete recovery is achieved. It is great for repairing cracks, small gaps, seam connections or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fire boxes, gas and commercial furnaces and water heaters. I didnt' have the time to fix it right so I just JB welded the whole . The Cast Iron Exhaust Manifold Repair Kit includes both 72 and 77 electrodes. Can it hold our. JB Weld ExtremeHeat is perfect for making repairs on all manner of high-heat parts, including exhaust manifolds, mufflers, catalytic converters, exhaust pipes, engine blocks, fireplaces, smokers/fireboxes, and many more crack-prone items. PRODUCT FEATURES AND STRENGTH: J-B Weld HighHeat has lap shear strength of 800 PSI at room temperature and 600 PSI at 400oF (204oC) or more. Yes it will hold up to the heat and brass is somewhat flexable also. Jb weld can be used on the exhaust when there are any kind of leaks in the exhaust system. If the crack is not close to the head, it might work better. . Because the manifold is made of forged steel, and forged steal is rather difficult to weld, I decided to try and use JB Weld's original cold welding epoxy system. J-B Weld HighHeat set and cure color is machine grey. It definitely will not hold up very long on a cracked exhaust manifold. Great for exhaust manifolds, tail pipes . One method is to drill on alternating sides of the crack line at 2" intervals. I could never recommend using JB Weld to repair your manifold. On the 429/460 heads, some guys leave them in.then shape them to help channel flow. Without heat, ExhaustWeld will set in 20 minutes and cure in 2 hours. Had the right side exhaust manifold fixed at a shop two years ago and luckily went smooth. If he wants to actually repair the problem he needs to purchase and install new manifolds and risers. If the leak is at a gasket you need to remove the manifold and replace the gasket. JB Weld ExtremeHeat is perfect for making repairs on all manner of high-heat parts, including exhaust manifolds, mufflers, catalytic converters, exhaust pipes, engine blocks, fireplaces, smokers/fireboxes, and many more crack-prone items.Click to see full answer. When time is up, fill a small container up with a sudsy solution of warm water and liquid dish detergent and pour it over the part slowly to rinse it. I think a 55 nickel will also do the trick. . Im likin' that RTV idea, i could just spread it on with my finger. SO no way a JB weld putty stick which claims it will bond an exhaust manifold, when the product actually states it can only withstand 500F. As Billr says, it is a different type of material than the old two part JB Weld epoxy (Which BTW also specifies it can be used on exhaust manifolds). once the metal is weakened its shot. This is an older thread, you may not . . The tensile strength of JB weld on cast iron is 3960 PSI. Hello, Like many others, my anodes on my exhaust (06 MCX ETX) need to be replaced as they have corroded enough that they will need to be replaced. DentalDart Well-Known Member. 96 XP . Exhaust Resonators Exhaust Heat Shields Exhaust Adapters & Connectors Exhaust Tips Exhaust Hardware Muffler Installation & Repair Exhaust . Rick E. (aka RicardoMarine) Gresham, Oregon 2850 Bounty Sedan Flybridge model Twin 280 HP 5.7's w/ Closed Cooling Volvo Penta DuoProp Drives Kohler 4 CZ Gen Set J-B Weld ExtremeHeat is formulated to allow for repairs to iron, steel and metal in high temperature environments (2400F / 1300C). Check the "goop" isle of your local auto parts store. . B beegshot Subscriber CURE AND SET TIME: ExhaustWeld can cure with or without heat! It did not hold up to the heat, but works great on other things. HighHeat is rated at a tensile strength of 800 psi and cures to a machine grey in color. If the person doing the welding is inexperienced. Includes one 2" x 72" repair wrap, a pair of gloves and aluminum tape. makes the problem even greater. Some drivers have attempted to use heat-resistant epoxy, such as JB Weld. This works fine for water jackets. Yes, you may see a high surface temperature right there. You can make this type of repair with a very small welder and still fix exhaust manifolds for a variety of vehicles, including cars, RVs, trucks, buses, and more. I have a 1996 Seadoo XP limited and the area around my hot tach probes in my Spec 2 exhaust manifold is leaking a little bit, only at high rpms. You can tie knots in a brazing rod. this isn't welding, it's a stop-gap, emergency type repair. Extract and change fault exhaust manifold Check exhaust bolts, clean the cylinder head Install new exhaust manifold and gasket Start engine to inspect for any exhaust leaks The default engine in most single cars is V-shaped with two exhaust manifolds connected to it. The raw water pump (seawater pump) is for cooling the exhaust manifolds and doesnt circulate through the engine block/heads. 2000 F150 4x4 ext cab 5.4L Only 55,000 miles but a Wisconsin rusted truck. Includes one 2" x 72" repair wrap, a pair of gloves and aluminum tape. Take a look at our video on how to weld a cast iron exhaust manifold using 72 and 77 rods. easy access, thought i'd try an epoxy repair. Unfortunately, I had to rig an adapter to connect it back to the previous-generation exhaust system at the bottom. compound can be drilled, machined or sanded. When fully treated, it can withstand 550 degrees Fahrenheit. Mopar Exhaust Systems. In detail, the labor costs are between $248 and $314, and the price of the parts is around $748 to $785. J-B Weld Muffler Cement 6oz Part # 37906 SKU # 567274 Limited-Lifetime Warranty $659 Free In-Store or Curbside Pick Up SELECT STORE Home Delivery Standard Delivery Est. I would suggest replacing the exhaust manifold with the stock replacement manifold available from the dealer for $186.62 you will need the exhaust manifold gasket and the donut gasket that goes between the manifold and pipe, Trying to install a header pipe is a big job and should be done by an expert but changing a exhaust manifold is a job you and your son can do. The ends can be plugged with a 9/16 or 7/16 th bolt, whether you want to cut the head off flush with the surface is irrelevent. . Issue: A leaky exhaust repair tips. the manifolds on my 1994 GMC pickup were replaced about 4 years/28K miles ago but i noticed there is a crack on top of the left one. Not only does it simplify the task of repairing cast iron but allows sturdy bonding. This way the water pressure won't push it out. jb weld "extreme" is rated at 2400, while others i've found are rated to 500f.