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Automotive Torque Specifications

 Home Chevrolet GMC Chevrolet S-10 & GMC S-15 1982-93

 Chevrolet S-10 and GMC S-15 1982-93

Engines

2.5L

Component

Torque

Camshaft Thrust Plate-to-Engine Bolts 90 inch lbs.
Crankshaft Damper Bolt 160 ft. lbs.
Cylinder Head Bolts (Fig. 2) 1985-88 90 ft. lbs.
1989-93

*

Engine Mount-to-Engine Bolts 35 ft. lbs.
Engine Mount-to-Frame Bolts 52 ft. lbs.
Engine Mount Through Bolts Bolts 61 ft. lbs.
Nuts 52 ft. lbs.
Exhaust Manifold Retainers All (Except center Retainers) 32 ft. lbs.
Center Retainers 36 ft. lbs.
Flywheel Bolts Automatic 55 ft. lbs.
Manual 65 ft. lbs.
Intake Manifold Early Models (With bolts and studs) 25-37 ft. lbs. **
Late Models (Using only bolts) 25 ft. lbs.
Knock Sensor 14 ft. lbs.
Main Bearings (In three steps) 70 ft. lbs.
Oil Pan 90 inch lbs.
Oil Pump Bolts 18 ft. lbs.
Oil Pump Pickup Tube Nut 31 ft. lbs.
Oxygen Sensor 30 ft. lbs.
Pushrod Cover Studs 88 inch lbs.
Nuts 106 inch lbs.
Rocker Arm Bolt 22 ft. lbs.
Rocker Arm Cover 75 inch lbs.
Rod Bearing Nuts All (Except 1992) 32 ft. lbs.
1992 39 ft. lbs.
Starter 30-33 ft. lbs.
Thermostat Housing-to-Engine Bolts 18-20 ft. lbs.
Throttle Body-to-Intake Manifold Bolts Early 2.5L's (With model 300 TBI throttlebody) 13 ft. lbs.
Late 2.5L's (With model 700 TBI throttlebody) 12 ft. lbs.
** Step 1: Tighten all head bolts to 18 ft. lbs.       Top of page
**Step 2: Tighten all bolts to 26 ft. lbs. (except #9)        
**Retorque #9 to 18 ft. lbs.        
**Step 3: Tighten all an additional 90 degrees        
** Each bolt may have it's own torque value (See fig. 1)        

Fig. 1 Intake manifold mounting-2.5L

 

Fig. 2 Cylinder head bolt torque sequence-2.5L

Fig. 3 Timing mark alignment-2.5L

 

 

 

 

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