Keith Browning Posted June 26, 2014 Share Posted June 26, 2014 I know we have touched on exhaust this and exhaust that here but damn it just seems like all of a sudden 6.4L trucks are now developing all kinds of exhaust leaks and are becoming a more common repair. Turbo up-pipes, exhaust manifolds, turbo... anyone else making this observation or am I late to the party? We have had a rash of them in the last year and currently I am replacing a HPFP gasket and observed a few broken manifold bolts which has be come more common than the flex joints in the up-pipes. <sigh> Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted June 27, 2014 Share Posted June 27, 2014 Nope, I'm fairly new to the diesel world and that's my earliest memory, 6.4 exhaust leaks. I've been noticing more and more with a leak between the turbos too, nothing I really noticed before recently. I still, if possible, prefer to pull the cab to do 6.4 exhaust manifolds. Even a partial cab lift, anything for just a little more room. Quote Link to comment Share on other sites More sharing options...
Steve Mutter Posted June 27, 2014 Share Posted June 27, 2014 I have seen a lot of right side up pipes but have only had two exhaust manifold leak, one on each side so far. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted July 1, 2014 Share Posted July 1, 2014 I see lots of broken manifold bolts. I fixed one a few weeks ago, left side rear lower bolt broken off at the head of the bolt. After removing the manifold and extracting the bolt I discovered that it was previously drilled offcenter and crooked. By the time I had the remaining peice of the original bolt out the hole was 7/16 oval. I drilled down the center of a 1/2 inch bolt and threaded it 8mm. Then I cut it off to make a threaded insert, drilled and threaded the hole in the head to 1/2unc. I ran the insert into the head on the end of an 8mm bolt with it locked in place with a nut (red loctite on the outer threads). I was then able to reinstall the head with a straight and centered bolt hole. I wish I had a camera at work that day. Saved the owner several grand by not having to change the head. 1 Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted July 1, 2014 Author Share Posted July 1, 2014 A Beydler Drill Guide would have prevented that situation. Good save though! It is interesting when you come upon somebody else's fuck ups. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted July 6, 2014 Share Posted July 6, 2014 The big problem was the last guy drilled it with the manifold on. That particular hole in the manifold is not a guide hole, so it is way oversized. Yes, a manifold re and re and the correct tools would have helped him ( and me) out a lot! Quote Link to comment Share on other sites More sharing options...
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