Anyone know of any TSB's for the oil pump? My fiance has a car in the shop right now that has a leak around the oil filter. He said at idle the oil pressure seems fine but as the rpms increase the oil pressure goes way up. He fears the the increased oil pressure has distorted the filter causing the leak. He thought he remembered a TSB for oil pump problems but has not been able to find one.
Also, anyone had any trouble with finding pieces of the needle bearings in their oil. In looking for the oil pump TSB he noticed a TSB for pieces of the needle bearings being found in the oil. This one is TSB #02-06-01-029.
Anyway, thanks in advance for any help!
Posted by Z28-SORR (Member # 1565) on :
This don't sound right. What do you mean by " oil pressure goes way up". How far is way up. Normal pressure is between ~20 to 60psi. On a high performance engine with a high pressure or high flow pump it not unusual to see 80psi or higher, with no filter problems. Just wondering.
Posted by RichardZ SS (Member # 161) on :
The needle bearings are from the roller rockers. I remember something about the oil pumps, but it was due to failure, not over-pressurization. There was no way to tell if your pump was defective, one second it was fine and the next your pressure drops to ZERO.
Posted by DaddySS (Member # 848) on :
Engine - Needle Bearings Found Upon Oil Change
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-01-029
Date: September, 2002
INFORMATION
Subject: Needle Bearings Found in Oil Pan (Replace Rocker Arms)
Models:
1998-2002 Chevrolet Camaro, Corvette 1998-2002 Pontiac Firebird 2002 Cadillac Escalade, Escalade EXT 1999-2002 Chevrolet Silverado 2000-2002 Chevrolet Suburban, Tahoe 2002 Chevrolet Avalanche 1999-2002 GMC Sierra 2000-2002 GMC Yukon, Yukon XL 2003 HUMMER H2 with 4.8L, 5.3L, 5.7L or 6.0L V8 Engine (VINs V, T, G, S, U - RPOs LR4, LM7, LS1, L56, L04, L09)
Condition
Some customers may comment or technicians may notice needle bearings being found during an engine oil change. The bearings may be found in either the drain pan used or on the magnetic oil pan drain plug.
Cause
One or more rocker arms may have experienced a bearing failure.
Correction
1. Inspect all of the rocker arms for bearing retainer cap failure. If one or more defective rocker arms are found, replace all 16 rocker arms. Refer to the Engine Mechanical sub-section in the appropriate Service Manual.
2. If no condition with the rocker arms is found, refer to the service history for previous rocker arm repair. If previous rocker arm repair was made, then the engine may not have been thoroughly cleaned of loose roller bearings. If no previous rocker arm repair was made, then look for another condition.
3. Remove the oil pan and clean out any additional bearings found within the oil pan. Refer to the Engine Mechanical sub-section in the appropriate Service Manual.
4. Install the oil pan. Refer to the Engine Mechanical sub-section in the appropriate Service Manual.
