What is this knocking noise...lifter?
This is a discussion on What is this knocking noise...lifter? within the Internal Engine forums, part of the LSx Technical Help Section category; Engine Knock or Lifter Noise (Replace O-Ring) #02-06-01-038 - (12/02/2002) Engine Knock or Lifter Noise (Replace O-Ring) 2001-2002 Chevrolet Camaro ...
05-09-2008, 05:07 PM #61
- Join Date
- May 2008
- 02 / WS6
Engine Knock or Lifter Noise (Replace O-Ring) #02-06-01-038 - (12/02/2002)
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
2002-2003 Chevrolet Avalanche
2000-2003 GMC Yukon, Yukon XL
2001-2003 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)
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 to operating temperature. This noise is different from other noises that may begin to occur at 3219-4828 km (2000-3000 mi).
The O-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil.
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.
(F and Y Cars)
Parts are currently available from GMSPO.
For vehicles repaired under warranty, use:
Pickup Tube and Screen - Replace
05-09-2008, 08:09 PM #62
- Ticking at any RPM- 2 hours on a Sunday wasted when nothing wrong was found
- Ticking at cold startup that goes away when warm- 1 hour on internet reading about piston slap
- A ticking noise that is different from others and starts after 2000-3000 miles that is the result of a torn/ripped O ring between the oil pump and oil pump screen which causes aeration of the oil- Priceless
05-10-2008, 08:54 AM #63
- Join Date
- Oct 2007
- Cushing, OK
- 2000 Z28 M6 HT
Any advice on my engine would be greatly appreciated.
I have an 01 Z28 A4 with a basically stock engine (Except for an SLP intake).
When the engine idles you can hear a clicking noise. The clicking sound is
quiter than the youtube post by the original poster. The guy I bought the
car from a year ago said it did that the entire time he owned it. (Approx.
20,000+ miles). The price was so cheap I bought it anyways.
The car clicks at idle, But at about 20 - 25 mph you can't here it anymore.
The clicking becomes lighter when the car is moved from park to drive.
(My mechanic told me since the clicking changed when you do that
that it wasn't a rod. Definatly a releif).
Anyways I don't know a whole lot about LS1 engines. I've always worked
on carburated 350 engines from my classic impala. If I were to guess I
would say my clicking sound is somewhere in my valvetrain. Rocker,
Pushrod, or Lifter. I'm hoping it's not the cam.
I would assume that it's not piston slap since my car uses very little oil.
(If I have piston slap wouldn't I be losing a lot of oil blowby due to
damaged piston rings?)
Any feedback would be appreciated.
This tread has convinced me to take my valve cover off to see what
I can see, So that's my next move.
05-10-2008, 10:56 AM #64
05-12-2008, 10:46 PM #65
- Join Date
- Feb 2007
- San Jose, CA
- 2000 Trans Am WS6
Same I got, you don't really hear it at higher RPMs, but it doesn't go away as the engine warms up. Well, I've checked all my rods and rockers now, and it isn't them. This weekend I'll go a-listenin' around the exhaust some more to see if maybe it's a leak somewhere there, though I don't think so.
05-13-2008, 09:08 AM #66
05-13-2008, 09:59 AM #67
I have had an exhaust manifold leak and it sounded like a ticking noise.
05-13-2008, 10:21 AM #68
05-13-2008, 10:22 AM #69
05-13-2008, 10:27 AM #70
05-13-2008, 11:00 AM #71
05-23-2008, 04:58 PM #72
- Join Date
- May 2008
- titus al
mine only does it cold few seconds at startup /lifter for sure
05-27-2008, 04:22 PM #73
- Join Date
- Aug 2005
- Rancho Santa Margarita, CA
- 2002 Trans Am
I added Rislone to my oil and that seems to have made the noise go away. It does say that it quiets noisy lifters right on the bottle.
06-28-2008, 08:04 AM #74
well got cam /rod/ lifters...ect in and no more noise the rods looked straight so we are assuming it was the lifters
06-28-2008, 08:09 AM #75
06-28-2008, 02:47 PM #76
07-02-2008, 03:13 PM #77
07-03-2008, 05:51 AM #78
yep, the car goes back on the dyno today
07-03-2008, 06:00 AM #79
05-09-2012, 10:52 PM #80
i have a simular problem and are not sure what it is...it doesnt start knocking until after the car is warmed up and it is coming from the passenger side of the motor...sounds too high up to be a rod...and after it is warmed up it only really knocks around 3000 rpms or more, not at idle...so i dont think its a valve but a lifter, maybe?...and if so can i replace those without pulling the heads off?...cause if i have to pull a head i might as well put some 5.3 heads on there and get a little higher compression...
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