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Home >> Chevrolet >> 1988 >> Forward Control 5.7 M, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Mechanical >> Engine Cooling Fan >> Cooling System Maintenance >> Testing >> Pressure Testing Radiator Cap

Pressure Testing Radiator Cap

Visually inspect radiator cap, then dip cap into water and connect to tester. Pump tester to bring pressure to upper limit of cap specification. If cap fails to hold pressure, replace cap.

Fig 1: Testing Radiator Pressure Cap
G92120
NOTE: Wet cap gasket before testing.