Engine Tick Noise at Valve Train Speed/Loss of Power (Replace Push Rod)
| Subject: | Engine Tick Noise at Valve Train Speed/Loss of Power (Replace Push Rod) |
| Models: | 2001 Chevrolet and GMC C/K and G Light Duty Models |
| 2001 Chevrolet and GMC B7, C6, C7 Medium Duty Models |
| with 8.1 L Engine (VINs E, G -- RPO L18) |
Condition
Some owners may comment on a ticking noise in the upper end of the engine. The noise is constant and does not vary with engine RPM. A loss of power may be noticed.
Cause
The push rods may have been damaged from improper contact with the rocker arms.
Correction
The engines affected have engine build numbers from T10104 to T10412. The identification labels are located on the left front and right rear of the rocker arm covers, and on the fluid pan. If the engine falls within the range above, inspect the push rod rocker arm end for cracks in the shaft (below the weld joining the ball to the shaft) and/or dislocation of the ball from the shaft. All of the push rods are to be replaced if any of them are damaged. Replace the rocker arms only if they have been damaged from contact with the push rod or a dislocated ball. Refer to the Service Manual procedure for push rod and rocker arm removal and replacement.
Parts Information
Part Number | Description | Qty |
|---|---|---|
12556295 | Push Rod Intake | 8 |
12556296 | Push Rod Exhaust | 8 |
Parts are expected to be available from GMSPO on 6/29/01.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J0587 | Push Rod -- Both Banks | See Applicable Time Guide |
