Causes for cracked exhaust manifolds
#1
Senior Member
Thread Starter
Causes for cracked exhaust manifolds
The drivers side exhaust manifold on my 88 bronco is cracked it two places so what is causing them to crack,I am thinking I might drop the y pipe and knock out the convertors if plugged convertors are one of the causes of cracking. Either I was lucky but never had a exhaust manifold crack on me,this one was cracked when I got it.
#2
Springer Spaniels Rule
Loose or bad hangers, the manifold is supporting the ypipe which it should not be, causing it to crack, the ypipe needs to be supported so the manifold dont take the stress of the ypipe.
#3
Mechanicalmike08
not to mention the cheap material there made from and the constant strain from heating and cooling of the material, along with the strain from the y pipe
#5
Senior Member
Thread Starter
It had no exhaust after the convertor and who knows for how long,I am about ready to put a muffler and tailpipe on it and did not want to hear a leak at the manifolds. Its cracked right here the pipe bolts on so the no support explains it,the reason I never had problems years ago is no weight from the convertors and I better check the pass side.
Last edited by Junkyardjeff; 02-08-2012 at 09:09 PM. Reason: added more words