Eventually bought two new manifolds, which haven’t cracked yet in 9 years of use My manifolds had just hairline cracks - no gaping chasms. Worked for a few weeks and then needed doing again. Jeremy, I had used a Holts product similar to Gun Gum, but white in colour. To: Re: Temporary fix for cracked exhaust manifold? The gap was caused by me driving over a lowerable parking post that I hadn’t lowered properly… I used this in the 1980s to fill a large gap in one of the downpipes of my XJ12. Paul 95 XJS 4.0 Convertible, 97 XJ8 Sovereign LWB 4.0 Heatshield back as the remainder will stay intact. Even if you can find a new pipe it’s �900,īut a welder should be able just to easily reweld the joinįor �30! I didn’t even bother putting the last bit of the Inches off the heatshield with a hacksaw and you’ll access If this is the case, remove the downpipe, cut the rear four You can’tĮven see the problem because the heatshield covers it up. This weld jointįails and the pipe can completely split apart. Behind the crimped heatshield, the two pipes are The really loud sound seems to more like the other AJ16-Įxhaust problem which is the exhaust weld splitting on theĭownpipe. Stops after 30 seconds as the manifold expands and the crack Give a very slight chuffing sound from cold which invariably The typical hairline cracks in the manifold usually only In reply to a message from sparkenzap sent Mon : Think I’ll try to fix it as well as I can and thenĬoat/paint them so that they don’t rust up as badly again.Īnyone have any experience with this stuff?– They also make a high temp coating/paint, so I Much hotter than the n/a versions, but surely that should beĮnough. From the looks of the rust around everythingĮxhaust related, I’m guessing these supercharged cars get Or something like that that claims to be good to over 1400ĭegrees. While I have the manifolds off, I’ll pull the frontĬatalyst/down pipe as well to see if there are any obviousĪlso, I’ve found a product from Por15 called Fire Seal 2000 And theĮxhaust noise/smell from under the hood starts even when theĬar is started cold. Small crack can really make that big a difference. Looking at how tight this crack is I’m wondering if such a I know cast iron expands quite a bit when it’s hot, but It certainly goes all the way through, and it I have only a hairline crack in the middle of the rear In reply to a message from Chris Copplestone sent Sat :
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