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Home >> GMC >> 1981 >> Magnavan Standard Trans >> Repair and Diagnosis >> Maintenance >> Procedures >> General Cooling System Servicing >> Testing >> Pressure Testing >> Radiator Cap

Radiator Cap

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Visually inspect radiator cap, dip cap in water and connect to tester. Pump tester to bring pressure to upper limit of cap specifications. If cap fails to hold pressure within specifications, replace cap.

Fig 1: Testing Radiator Pressure Cap
G09330560Courtesy of GENERAL MOTORS COMPANY