Corvette V8-6.2L (2008)
Oil Reservoir: Customer Interest
Engine - Under Hood Rattle/Tapping Noise
TECHNICAL
Bulletin No.: 08-06-01-019
Date: August 13, 2008
Subject:
Rattle/Tapping Type Noise Heard Under Hood (Diagnose and Replace Engine Oil Tank Transfer Tube Seal (0-Ring))
Models:
2006-2009 Chevrolet Corvette Z06
2009 Chevrolet Corvefte ZR1
with 6.2L or 7.0L Engine (VINs R, E - RPOs LS9, LS7)
Condition
Some customers may comment on a rattle or tapping type noise that is heard under the hood at just above idle usually 1200 to 2200 RPM. In some cases
this noise may also be heard on the inside of the vehicle and be more pronounced on the passenger side.
Cause
This noise may be caused by the internal transfer tube in the engine oil tank hitting the inside of the tank cover. The seal (0-ring) that secures the tube in
place may split and slide down the tube allowing the tube to be loose.
Correction
Diagnose the noise by raising the vehicle on a hoist and holding the throttle at about 1500 RPM to duplicate the condition. Use a stethoscope or
chassis ears and place them on the side of the engine oil tank. If the noise is detected perform the procedure outlined below. If the noise is not
detected continue following published diagnostics in SI.
1.
Remove the engine oil tank from the vehicle. Refer to the Oil Tank Replacement procedure in SI.
2.
Remove the eight bolts that secure the tank top.
3.
Separate the tank. Check the seal (0-ring) for proper position and damage. Replace the seal (0-ring) if damaged with P/N 24576940.
4.
Reinstall the tank top and secure with the eight bolts.
5.
Install the engine oil tank into the vehicle. Refer to the Oil Tank Replacement procedure in SI.
Parts Information
Warranty Information
For vehicles repaired under warranty use the table.
