Century V6-204 3.3L VIN N FI (1990)
Valve Cover Gasket: Technical Service Bulletins
Valve Cover Gasket - Replacement Procedure Update
Bulletin:
91-6A-3
Date:
April, '91
Ref. No.:
91-142-6A
Corp. Ref. No.:
136107
SUBJECT:
SERVICE MANUAL UPDATE - SECTION 6A ENGINE MECHANICAL -
VALVE COVER AND/OR GASKET REPLACEMENT PROCEDURE
MODELS AFFECTED:
1990 - '91 CENTURY MODELS EQUIPPED WITH 3300 V6 ENGINE
SERVICE MANUAL UPDATE
SECTION 6A6
The following Valve Cover and/or Gasket replacement procedure updates and replaces the current procedure found in the 1990-91 Century Service
Manual
-
Section 6A6.
VALVE ROCKER COVER (RIGHT)
Remove or Disconnect
1.
Negative battery cable
Serpentine belt
3.
Power steering belt tensioner brace
4.
Spark plug loom, wires and wire harness, set aside
5.
Power steering pump retaining bolts to mounting bracket, slide pump forward
6.
Retaining nuts and engine lift bracket assembly, set aside
7.
Valve cover retaining bolts, valve cover and gasket
Assembly Tips
Clean the valve cover bolts of all thread locking adhesive. Apply thread lock compound, P/N 12345493 (currently available from GMSPO) or equivalent
to bolt threads.
Install or Connect
1.
New gasket
2.
Valve cover and retaining bolts
Tighten Bolts to 10 N-m (89 lbs.in.)
3.
Engine lift bracket assembly and retaining nuts
Tighten Nuts to 30 N-m (22 lbs.ft.)