74k stock block leak down
Thread Starter
thing knower
Joined: Mar 2017
Posts: 3,404
Likes: 943
From: wpb
74k stock block leak down
thought some of you might enjoy this.... 2007 ls7
totally stock block @ 74k miles.... original heads i'm pretty sure after this test....
cylinder 1 was the worst, but 2 and 7 did the same thing....
edit - i apologize for the shitty video, wasn;t trying to make a documentary
totally stock block @ 74k miles.... original heads i'm pretty sure after this test....
cylinder 1 was the worst, but 2 and 7 did the same thing....
edit - i apologize for the shitty video, wasn;t trying to make a documentary
Last edited by drewz06; Apr 30, 2020 at 11:05 PM.
Thread Starter
thing knower
Joined: Mar 2017
Posts: 3,404
Likes: 943
From: wpb
btw... when we tested #1.... a bunch of carbon came flying out of the intake port.... landed on top of the valley cover...
will be pulling the heads tomorrow and tear down the heads to see how bad the valves are....the weird thing is i was making 450/425 to the wheels on the dyno about 50 miles prior to the tear-down..
#7 had leakage out of the exhaust port...
we had two cylinders that were 90/90 perfect, so nearly zero leakdown.... i'm thinking the short block is fine, and the heads are just all fucky...
-drew
will be pulling the heads tomorrow and tear down the heads to see how bad the valves are....the weird thing is i was making 450/425 to the wheels on the dyno about 50 miles prior to the tear-down..
#7 had leakage out of the exhaust port...
we had two cylinders that were 90/90 perfect, so nearly zero leakdown.... i'm thinking the short block is fine, and the heads are just all fucky...
-drew
