Engine - Snapping Valve Noise

91acura02

April 8, 1991

BULLETIN NO.

91-018


YEAR MODEL VIN APPLICATON
1990-1991 INTEGRA ALL


Valve Noise

SYMPTOM

A snapping noise, similar to a spark plug wire arcing, heard as the engine reaches operating temperatures.


PROBABLE CAUSE

Cylinder head is unevenly torqued.


CORRECTIVE ACTION

Retorque the cylinder head.

1. Allow the engine coolant temperature to drop below 38~C (100~F).

2. Remove the camshafts.

3. Using the loosening sequence in the Service Manual (page 6-9), Individually loosen then retorque each cylinder head bolt to 7 lb.ft.

4. When ALL head bolts have a torque of 7 lb.ft., retorque, using the torque sequence in the Service Manual (page 6-17) to 22 lb.ft., then to 43 and finally to 61 lb.ft.

5. Reinstall the camshafts and adjust the valve clearance to 0.15 mm IN and 0.17 mm EX.


WARRANTY CLAIM INFORMATION

In warranty: The normal warranty applies.

Out-of-warranty: Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Service Manager. You must request consideration, and get the DSM's decision, before starting work.

Operation number: 110010

Flat rate time: 1.5 hrs.

Faifed P/N: 12100-PR4-A00

Defect code: 042

Contention code: B07