LS2 LS7 lifter failure
12-23-2009, 11:04 PM
#1
LS2 LS7 lifter failure I had a LS7 lifter fail it wiped out my cam, the shop pulled the heads cam and lifter said the the lifter sleeve guide was OK no damage. installed new cam and Comp Cam lifters. I have two questions what would cause the lifter to fail and now the engine makes sewing machine noise from the side of the engine that had the failure. Oh and the water pump went bad and the rear main seal is out after the repairs.
Last edited by B Layton; 12-23-2009 at 11:06 PM. Reason: spelling
12-23-2009, 11:40 PM
#4
1750 miles, compcam Comp Cams XE-R lobed grind - 237/242 duration @ .050, .603/.609 lift, 112 LSA, Heads, 7.4" Chromemoly Pushrods, L92 Rocker Arms, Pedestals & Bolts, PRC
Gold Double Valvesprings /w Titanium Retainers locks/seals/bases, should all been new
Gold Double Valvesprings /w Titanium Retainers locks/seals/bases, should all been new
Trending Topics
12-29-2009, 07:36 PM
#10
Where did you get those lifters. Those look like old first generation LS1 lifters that have no support on the top and bottom of the rollers.
Take a look at the attached pic. Your looks like the one on the right which is an old design. The new LS7 replacements are the ones on the left. Plus you probably wouldn't be using 7.400 pushrods.
Take a look at the attached pic. Your looks like the one on the right which is an old design. The new LS7 replacements are the ones on the left. Plus you probably wouldn't be using 7.400 pushrods.
12-29-2009, 08:49 PM
#11
FormerVendor
Join Date: Jun 2005
Location: Toronto,Canada
Posts: 237
Likes: 0
Received 0 Likes
on
0 Posts
Where did you get those lifters. Those look like old first generation LS1 lifters that have no support on the top and bottom of the rollers.
Take a look at the attached pic. Your looks like the one on the right which is an old design. The new LS7 replacements are the ones on the left. Plus you probably wouldn't be using 7.400 pushrods.
Take a look at the attached pic. Your looks like the one on the right which is an old design. The new LS7 replacements are the ones on the left. Plus you probably wouldn't be using 7.400 pushrods.
Rob.
