Cylinder Block Assembly: Testing and Inspection

CYLINDER-TO-WATER JACKET LEAKAGE TEST

WARNING: USE EXTREME CAUTION WHEN THE ENGINE IS OPERATING. DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR THE FAN. DO NOT WEAR LOOSE CLOTHING.

Remove the radiator cap.
Start the engine and allow it to warm up until the engine thermostat opens.
If a large combustion/compression pressure leak exists, bubbles will be visible in the coolant.
If bubbles are not visible, install a radiator pressure tester and pressurize the coolant system.
If a cylinder is leaking combustion pressure into the water jacket, the tester pointer will pulsate with every combustion stroke of the cylinder.