Alright, next question. I'm told that when the tranny mount goes bad it will allow the pipe to move and cause the exhaust manifold to crack. Is this true? I'm asking because I've replaced my manifold 3 times now and the tranny mount is in great condition. I can't figure out what is causing this problem. Any ideas on what's causing this to happen? or am I just lucky enough to be the one cursed with the gremlins that keep this happening so that you guys can go on without experiencing the joys of replacing one of these.
jdogg you've got a 2000 right? Keep an eye on you exhaust manifold. I first started having trouble on my 99 at about 55K. Ever since it started I can't seem to get it fixed. I'm beginning to think that I'm cursed to replace it every other year or so now.
instead of replacing it, why not just get the crack welded shut. seems I've heard of ALOT of cracked exhaust manifolds (usualy older ones though) and the general concencus is to just weld the bugger back to a sealed state.
I've tired welding it. Doesn't work. The crack is in such an area between one of the exhaust pipes that you can't get in to weld it. About the only way is to seal it up with a piece of scrap welded over the top of it creating a little chamber so to say. Usually this works for a few miles but eventually it cracks out as-well.
I'm wondering if there is something that is torquing the manifold around, hence the bad tranny mount etc. I've checked all my bolts and everything is always torqued right. This has got me buffaloed.
not really I was looking at my setup and the only thing I can see is the hangers that the system is on. it doesnt touch anything else. that is strange that you keep craking the manifold and the header. You got me on this one.
yo md.....ive been following this thread and thinking bout it........how are ur motor mounts?...are they kind of tight, and rigid.....are ur exhaust hangers flexible enough to allow the engine to move?....it could be an engine, trying to move a rigid exhaust?....just a thought
You know that is a damn good point. I haven't even thought to check out my motor mounts. I've chased every other freakin mounting point in the drive train and exhaust. :bang:
I completely overlooked the motor mounts. It could work the other way with some sloppy bad mounts as-well. I'll definitely give this a look over this weekend while I pull my o2 sensors to check if they're kaput.