Engine Knock or Lifter Noise
Engine Knock or Lifter Noise I recieved this from the dealer regarding my cold start knock problem on my car since it was new. I believe this has nothing to do with it but I'm going to post this for others who might have this problem. I'm an ASE Master auto tech for the last 28 years. It's so hard to get them to fix my darn knock. I know what it is. (piston to cyl wall clearence.) But they don't want to do it. Bad CarDealers should go to Iraq and be a meatshields for our Brave men/women. Here ya go....
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Document ID# 1206539
2002 Chevrolet Camaro
Engine Knock or Lifter Noise (Replace O-Ring)
#02-06-01-138 - (Dec 2, 2002)
Engine Knock or Lifter Noise (Replace O-Ring)
2001-2002 Chevrolet Camaro
2001-2003 Chevrolet Corvette
2001-2002 Pontiac Firebird
2002-2003 Cadillac Escalade, Escalade EXT
2000-2003 Chevrolet Suburban, Tahoe
2001-2003 Chevrolet Silverado
2001-2003 Chevrolet Avalanche
2000-2003 GMC Yukon, Yukon XL
2000-2003 GMC Sierra
with 4.8L, 5.3L, 5.7L or 6.0L V8 Engine (VINs V, T, Z, G, S, N, U, -- RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4)
Condition
Some customers may comment on an engine tick noise. The distinguishing characteristic of this condition is that it likely will have been present since new, and is typically noticed within the first 161-322 km (100-200 mi). The noise may often be diagnosed as a collapsed lifter. Additionally, the noise may be present at cold start and appear to diminish and then return as the engine warms up to operating temperature. This noise is differant from other noises that may begin to occur at 3210-4828 km (2000-3000 mi).
Cause
The O-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil.
Correction
Inspect the O-ring seal and replace as necessary. Use the applicable part number listed below. Refer to the Engine Mechanical sub-section of the appropriate Service Manual.
Parts Information Description Qty
12557752 Seal-O/Pmp (O-ring) 1
(F and Y Cars)
12563963 Seal-O/Pmp (O-ring) 1
(C/K Trucks)
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation J1060
Description Pickup Tube and Srceen - Replace
Usage F Car, Y Car, C Truck, K Truck
Labor Time 3.7hrs 4.3hrs 1.3hrs 2.1hrs
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Document ID# 1206539
2002 Chevrolet Camaro
Engine Knock or Lifter Noise (Replace O-Ring)
#02-06-01-138 - (Dec 2, 2002)
Engine Knock or Lifter Noise (Replace O-Ring)
2001-2002 Chevrolet Camaro
2001-2003 Chevrolet Corvette
2001-2002 Pontiac Firebird
2002-2003 Cadillac Escalade, Escalade EXT
2000-2003 Chevrolet Suburban, Tahoe
2001-2003 Chevrolet Silverado
2001-2003 Chevrolet Avalanche
2000-2003 GMC Yukon, Yukon XL
2000-2003 GMC Sierra
with 4.8L, 5.3L, 5.7L or 6.0L V8 Engine (VINs V, T, Z, G, S, N, U, -- RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4)
Condition
Some customers may comment on an engine tick noise. The distinguishing characteristic of this condition is that it likely will have been present since new, and is typically noticed within the first 161-322 km (100-200 mi). The noise may often be diagnosed as a collapsed lifter. Additionally, the noise may be present at cold start and appear to diminish and then return as the engine warms up to operating temperature. This noise is differant from other noises that may begin to occur at 3210-4828 km (2000-3000 mi).
Cause
The O-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil.
Correction
Inspect the O-ring seal and replace as necessary. Use the applicable part number listed below. Refer to the Engine Mechanical sub-section of the appropriate Service Manual.
Parts Information Description Qty
12557752 Seal-O/Pmp (O-ring) 1
(F and Y Cars)
12563963 Seal-O/Pmp (O-ring) 1
(C/K Trucks)
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation J1060
Description Pickup Tube and Srceen - Replace
Usage F Car, Y Car, C Truck, K Truck
Labor Time 3.7hrs 4.3hrs 1.3hrs 2.1hrs
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Last edited by zombiedude; Dec 8, 2004 at 06:36 PM.
Teching In
Joined: Feb 2005
Posts: 1
Likes: 0
I have a 2001 Ws6 i bought recently and have noticed since the purchase the cold start piston knock. I took it to a pontiac dealership and had them look at it. They said it was common in the ls1 and no repairs were done. Is this right or should they repair or replace pistons? What did you do, and the results?
Staging Lane
Joined: Dec 2004
Posts: 83
Likes: 0
From: Warren,Mi
i liked to know this to.is a recall that they have to fix or just tsb?i took mine in they said 2 lifters and valves were bad.they replaced them.got the car sounded great.next morning started her up again noise was back like they did nothing
DO a search - there are LOTS and LOTS and LOTS of posts about both the o-ring and the piston slap....if you read a few you'll be an expert on both issues.
I have the cold start knocking also - it goes away when it's warm and then I just have valve train ticking...
I have the cold start knocking also - it goes away when it's warm and then I just have valve train ticking...
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
iF YOU DON'T LIKE IT, THEY HAVE TO FIX IT, OTHERWISE MENTION LAWYER AND LAWSUIT AND THEY WILL BE QUICK TO DO IT.
However it is not a bad thing and doesn't affect your motor (actually some fixed ones have lost power)
Get a choppy cam, you won't notice it anymore.
However it is not a bad thing and doesn't affect your motor (actually some fixed ones have lost power)
Get a choppy cam, you won't notice it anymore.
