The MGA With An Attitude
Engine OIL COOLER, Testing and Cleaning - OF-105D

At 07:40 AM 7/24/05 -0400, saidel at wrote:
"How do I check the oil cooler radiator for leaks, for blockage, etc?"

1.) Run water through it with a garden hose to check for free flow. Flow in both directions to flush out any residue (trash) that might possibly be inside.

2.) Apply moderate air pressure and submerge it in water to check for bubbles (leakage).

3.) Finally apply air pressure at least 1.5 times as high as maximum pressure expected in operation (burst test). An oil cooler might be expected to handle operating pressure up to 100 psi, so the test pressure should be 150 psi. Wear goggles when you do this. If it blows (very unlikely) you might get heavily splashed, or maybe even hit with a bit of shrapnel.

When finished, drain it completely and blow it out with compressed air to remove any water before installation on the car.

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