Need opinions on problem. Had a manifold cracked. **UPDATE NEW MANI PICS ADDED**
01-07-2006, 05:36 PM
#11
1.0 BAR
Join Date: Oct 2005
Posts: 216
Re: Need opinions on problem. Had a manifold crack but really strange.
You need to put cuts between each exhaust port.That will help to relieve some of the stress of expansion and contraction.Thicker material in your case will just pull the exhaust manifold studs out of the head,and that would be bad.A longer runner disperses the expansion away from the head so the problems are not as bad.Thats why the big guys quit making log manifolds.
01-07-2006, 05:57 PM
#13
0.0 BAR
Thread Starter
Join Date: Mar 2004
Posts: 0
Re: Need opinions on problem. Had a manifold crack but really strange.
Originally Posted by slappynuts
You need to put cuts between each exhaust port.That will help to relieve some of the stress of expansion and contraction.Thicker material in your case will just pull the exhaust manifold studs out of the head,and that would be bad.A longer runner disperses the expansion away from the head so the problems are not as bad.Thats why the big guys quit making log manifolds.
Steve, I know you had a hand in this!! I blame you!!! :P
01-07-2006, 08:08 PM
#15
Banned
Join Date: Aug 2003
Posts: 2,898
Re: Need opinions on problem. Had a manifold crack but really strange.
Just had to throw that out there Dave, But on a serious note, the cracks themselves even look strange and the way they came out on the bottom of the manifold. My guess is that mother nature had alot to do with it, being that those crazy minnesota guys live in -500 degree weather. Your welds are pretty damn solid on everything ive seen
01-07-2006, 08:19 PM
#17
1.0 BAR
Join Date: Nov 2005
Posts: 483
Re: Need opinions on problem. Had a manifold crack but really strange.
that is really weird that it just cracked straight across like that. the upward force theory sounds most reasonable to crack it like that. it doesnt look like it the manifold was hot when it happened either, just looks like something pulled straight up on it while it was cold. csaddict sounds like you're a good businessman, keep it up
01-07-2006, 09:20 PM
#18
3.0 BAR
Join Date: Dec 2002
Posts: 12,568
Re: Need opinions on problem. Had a manifold crack but really strange.
my opinion is the cracking is in the wrong location for it to have cracked, not to mention the cracks are lifted and the pattern of the crack indicates it was caused from a upward forceful motion.
theres also zero traces of carbon, as i zoomed in to about 800 percent on photoshop and saw nothing.
there is no way to not notice these cracks while driving, they are so large and ------ aprt your turbo would not even spool.
i say he jacked up the engine by the manifold ad broked it, and now hes fishing for a new one.
theres also zero traces of carbon, as i zoomed in to about 800 percent on photoshop and saw nothing.
there is no way to not notice these cracks while driving, they are so large and ------ aprt your turbo would not even spool.
i say he jacked up the engine by the manifold ad broked it, and now hes fishing for a new one.
