| http://www.w3.org/ns/prov#value | - a leak down tester uses air from a compressor and measures the rate at which it leaks through the engine. this is done with the engine not running and the beauty of this is that toy can find the source of the leakage by listening for the escaped air. internal leakage is found by air bubbles in the cooling system. tools need are a leak down tester and an air compressor. the tester is available from
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