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CYLINDER-TO-WATER JACKET LEAKAGE TEST WARNING: USE EXTREME CAUTION WHEN THE ENGINE IS OPERATING WITH COOLANT PRESSURE CAP VISUAL TEST METHOD With the engine cool, remove the coolant pressure cap. Start the engine and allow it to warm up until thermostat If a large combustion/compression pressure leak exists, bubbles will be visible in the coolant. COOLING SYSTEM TESTER METHOD WARNING: WITH COOLING SYSTEM TESTER IN PLACE, PRESSURE WILL BUILD UP FAST. EXCESSIVE Install Cooling System Tester 7700 or equivalent to pressure cap neck. Start the engine and observe the tester’s CHEMICAL TEST METHOD Combustion leaks into the cooling system can also be checked by using Bloc-Chek Kit C-3685-A or equivalent. REMOVAL 1. Remove cowl grille (4). HB ENGINE - 5.7L SERVICE INFORMATION 9 - 1351 |