Automotive Torque Specifications
Home Buick Buick Full Size 1970-88

Buick Full Size 1970-88

LeSabre, Estate, Electra and Limited

Engine

Buick V-6
Component Torque
Cylinder Head Bolts 1970-85 80 ft. lbs.
1986-88 Step 1 25 ft. lbs.
Step 2 Turn 90° *
Step 3 Turn 90° *
Exhaust Manifold Bolts 1970-85 25 ft. lbs.
1986 20 ft. lbs.
1987-88 37 ft. lbs.
Intake Manifold Bolts 45 ft. lbs.
Main Bearing Bolts 1975 and 1976 115 ft. lbs.
1977-88 100 ft. lbs.
Oil Pan Bolts 15 ft. lbs.
Oil Pump Cover Bolts 10 ft. lbs.
Rocker Arm Cover Bolts 5 ft. lbs.
Rocker Arm Shaft Nuts 30 ft. lbs.
Rod Bearing Cap Nuts 40 ft. lbs.
Thermostat Housing-to-Intake Manifold Bolts 20 ft. lbs.
Timing Chain Cover Bolts 20 ft. lbs.
Vibration Damper-to-Crankshaft Bolt 1975 150 ft. lbs.
1976 and 1977 175 ft. lbs.
1978-84 225 ft. lbs.
1985-88 200 ft. lbs.
Water Pump-to-Block Bolts 7 ft. lbs.
                  * Do not exceed 60 ft. lbs. on steps 2 and 3 during this procedure          
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Fig. 1 Cylinder head bolt torque sequence-Buick V-6 1970-84

Fig. 2 Cylinder head bolt torque sequence-Buick V-6 1985-88

Fig. 3 Intake manifold torque sequence-Buick V-6

Fig. 4 Timing mark alignment-Buick V-6 and V-8

 

 

 

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