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.
1982 GMC Magnavan Standard TransFACTORY OEM SERVICE PROCEDURE
Piston Ring Set: Remove & Replace
WARNING: This page is about the Magnavan Automatic Trans, Trans Mfr CD 400/M40, which is a different variant/trim than selected.
Includes: Remove carbon and Cylinder ridge, burnish Cylinders and replace Rod Bearings. Adjust Valves (where applicable).
DOES NOT include Pin fit and/or align.| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| G3500,V8,Gas,5.7L Eng,Automatic Trans, All Cylinders | 16.1 | A | ||
| Additional Procedure: PISTON RING SET: Remove & Replace: | ||||
| G3500,V8,Gas, Where Air Cond interferes add,One Side or Both | 0.6 | 0.6 | A | |
| V8, Where Air Pump interferes add | 0.2 | 0.2 | A | |
| V8, Where Engine Oil Cooler interferes add | 0.3 | 0.3 | A | |
| Where Cruise Control interferes add | 0.2 | A | ||
| Where Elect Eng System interferes add | 0.5 | A | ||
| Where Pwr Strg interferes add | 0.4 | A | ||
| Combination Procedure: MAIN BEARINGS: Remove & Replace: | ||||
| V8,Gas, All | 2.1 | A | ||
| Combination Procedure: PISTON OR ROD PIN: Remove & Replace: DOES NOT include Pin fit and/or align. | ||||
| Each | 0.3 | A | ||
| Combination Procedure: ROCKER ARM STUD: Remove & Replace: | ||||
| Each Additional | 0.2 | B | ||
| One | 0.3 | B | ||
| Combination Procedure: VALVE: Grind Complete: | ||||
| V8,Gas | 3.5 | A | ||
| Combination Procedure: VALVE LIFTERS: Remove & Replace: | ||||
| V8, All | 0.5 | B | ||
| Combination Procedure: VALVE LIFTERS (REMOVED): Clean: | ||||
| Each Additional | 0.1 | B | ||
| One | 0.2 | B | ||
Factory Service Tools
Use the Manual With the Right Hardware
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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.