COOLING SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
CHECKING FILLER CAP
N OT E
Pressure loss in cooling system can be caused by defective seal on radiator filler cap.
With engine cool, slowly loosen filler cap (1) to release any pressure from cooling system. Remove filler cap when pres-
Inspect filler cap seal (2). Check for damage to seal and sealing surface of radiator (3).
Remove any debris on cap (1), filler cap seal (2), or sealing surface of radiator (3).
Install filler cap (1) on cooling system pressure tester.
Note pressure at which filler cap (1) opens.
Compare noted pressure to pressure rating marked on top of filler cap (1).