Engine - Removing Serpentine Belt Tensioner/Front Cover

9225buick02

Bulletin: 90-6A-4

Date: Feb., '90

Ref. No.: 90-066-6A

Corp. Ref. No.: 006101


SUBJECT:
SERVICE MANUAL UPDATE - 1989-1990 SECTION 6A6 - PROCEDURE FOR REMOVING SERPENTINE BELT TENSIONER AND REVISED PROCEDURE FOR REMOVING FRONT COVER

MODELS AFFECTED:
1989-90 SKYLARK WITH 3300 ENGINE (VIN CODE N)


This Bulletin contains two service procedures. The first is a procedure for removing the Serpentine Belt Tensioner. This procedure was omitted from the 1989 and 1990 Service Manual. The second is a revised service procedure for removing the front cover.

New Labor Times for both procedures are included below.

PROCEDURE FOR SERPENTINE BELT TENSIONER REPLACEMENT

Tools Required:
J28467 Support Fixture

REMOVE OR DISCONNECT

1. Negative Battery Cable
2. Drain Coolant
3. Radiator and Heater Hoses
4. Two Generator Wires
5. Serpentine Belt
6. Two Generator Bolts
7. Power Steering Pump
8. Raise Vehicle and Suitably Support, see Section 0A
9. Right Front Wheel
10. Right Drive Axle, see Section 4D
11. Support Engine using J28467
12. Engine Mounts
13. Raise Engine for Clearance
14. Belt Tensioner

INSTALL OR CONNECT

To complete installation - reverse the removal procedure


PROCEDURE FOR FRONT COVER REPLACEMENT

Tools Required:
J28467 Support Fixture
J37087 Crankshaft Sensor Adjuster
J37096 Flywheel Holding Tool

REMOVE OR DISCONNECT

1. Negative Battery Cable
2. Serpentine Belt Tensioner
3. Inner Fender Splash Shield
4. Torque Converter Cover
5. Hold Flywheel with J37096
6. Crankshaft Balancer Bolt
7. Balancer
8. Electrical Connections at Camshaft Sensor, Crankshaft Sensor and Oil Pressure Sender
9. Oil Pan Bolts and Oil Pan
10. Front Cover Attaching Bolts and Cover

INSPECT

- Timing chain for overall "in and out" movement. Should not exceed 25.4 mm (one inch).
- Sprockets for wear

CLEAN

- Gasket mating surfaces at timing chain cover, and cylinder block.
- If oil pan gasket is excessively swollen, the oil pan must be removed and the gasket replaced.

INSTALL OR CONNECT

1. Front Cover Gasket
2. Front Cover and Attaching Bolts
^ Apply Sealant GM P/N 1052080 or Equivalent to Bolt Threads
^ Tighten Bolts to 30 N-m (22 lbs.ft.)
3. Oil Pan
^ Tighten Bolts to 10 N-m (88 lbs.in.)
4. Electrical Connections
5. Adjust Crank Sensor Using J37087
6. Balancer and Bolt
^ Hold Flywheel with J37096
^ Tighten Bolt to 297 N-m (219 lbs.ft.)
7. Torque Converter Cover
8. Inner Fender Splash Shield
9. Belt Tensioner
10. Negative Battery Cable


WARRANTY INFORMATION

Labor Operation Number:
J0680
Labor Time:
1.9 Hours

Labor Operation Number:
J0780
Labor Time:
3.4 Hours