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 MANUALSGMC1972SPRINT CUSTOM, 6.6L ENG VIN EREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICALTUNE-UP - V8COMPRESSION PRESSURE
1972 GMC Sprint Custom, 6.6L Eng VIN E
Compression Pressure
1972 GMC Sprint Custom, 6.6L Eng VIN ESECTION Compression Pressure
With air cleaner removed and choke and throttle wide open, crank engine through at least four compression strokes. Compression should be 150 psi with a maximum variation of 20 psi between cylinders.
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.