chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

All Other Service Bulletins for Intake Manifold: > < Engine - Internal Coolant Leaks
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3.

Measure the distance between the rocker cover mounting flange and the bottom of the coolant passages (front and rear) (see Figure).

4.

If the distance is less than 2.60 inches, replace the cylinder head(s) with the following part numbers.

LB9 V8 Engine, P/N 10159553

L98 V8 Engine, P/N 10159552

Parts are currently available from GMSPO.

Labor Operation:

T1800

Labor Time:

Inspect both cylinder heads

10.3 

with A.C.                        

+.1

Clean part on vehicles with
>30,000 miles

+.3

Replace head (right or left)

.6

Replace both heads

1.1

All Other Service Bulletins for Intake Manifold: > < Engine - Internal Coolant Leaks