Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1987FORWARD CONTROL 4.8 T, AUTOMATIC, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMAIR INJECTION SYSTEM - VEHICLES OVER 8500 GVWTORQUE SPECIFICATIONS
1987 Chevrolet Forward Control 4.8 T, Automatic, 400/M40
Torque Specifications
1987 Chevrolet Forward Control 4.8 T, Automatic, 400/M40SECTION Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Adapter Screws (5.7L VIN G) | 18 (25) | |
| Air Control Valve Screws (5.7L - VIN G & P) | 18 (25) | |
| Air Injection Pipe Nuts | 20 (28) | |
| AIR Pump Mounting Screws | ||
| 4.8L | 18 (25) | |
| 5.7L (VIN G) | 18 (25) | |
| 5.7L (VIN P) | 36 (50) | |
| Check Valve Nut | ||
| 4.8L | 26 (35) | |
| 5.7L (VIN G & P) | 26 (35) | |
| Pulley Screws | ||
| First Stage | 10 (15) | |
| Second Stage (Within 10 Minutes) | 10 (15) | |
| INCH Lbs. (N.m) | ||
| High Flow Electric Switch Bolts (4.8L) | 94 (10) | |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.