LS motors and broken exhaust bolts

John Kissel · 10-26-2013, 06:54 PM

We have a '06 TrailBlazer SS that is pretty quick when it and it's electronics are in the mood. Last night I was changing plugs and noticed the rear exhaust manifold bolts on both banks don't have the heads on them anymore. I found one bolt head between the heat shield and bottom flange, and it looks like it popped off the shank at the last thread. Anybody else come across this problem, since there are 3 metals involved and they all expand and contract at different rates. Thanks, John Kissel

10-26-2013, 06:54 PM	#1
John Kissel Member Join Date: Sep 2012 Location: Colt's Neck, n.j. Posts: 349 Likes: 766 Liked 230 Times in 94 Posts	LS motors and broken exhaust bolts We have a '06 TrailBlazer SS that is pretty quick when it and it's electronics are in the mood. Last night I was changing plugs and noticed the rear exhaust manifold bolts on both banks don't have the heads on them anymore. I found one bolt head between the heat shield and bottom flange, and it looks like it popped off the shank at the last thread. Anybody else come across this problem, since there are 3 metals involved and they all expand and contract at different rates. Thanks, John Kissel