Unlike a compression test a leak down tester has two gauges and requires a compressed air source. A threaded coupling is screwed into a spark plug hole.
Diesel Fuel Oil Pressure Testers Amp Diagnostics
Diesel leak down tester. The compression tester inserts into the spark plug hole for each of the cylinders to be tested. Test the engine at operating temperature for the best results. An engine leakdown test is a compression test in reverse. One gauge on the tester measures the pressure of the air entering the cylinder and the other measures the percentage of the air escaping or leaking from the cylinder. Like a compression test a leak down test is accomplished by replacing a spark plug with the tester hose. Product description otcs 5609 cylinder leakage tester kit quickly diagnoses internal engine problems like bad rings valves and leaking head gaskets and comes complete with adapters for most applications.
Pressurized air is supplied to each cylinder and in moments displays a rate of leakage measure from 0 to 100. Check compression on most domestic and foreign diesel engines this compression tester reads pressure from 0 1000 psi. Unplug the coil wire from the. Featuring a quick connect adapter gauge and a thumb button air release this compression tester comes with adapters for gm ford lincoln isuzu mercedes benz kubota toyota volkswagen peugeot. A cylinder leak down test takes more time to perform. The dual 2 12 gauges read 0 100 psi and 0 700 kpa and feature chrome bezels and rugged protective outer boots.
In the leak down test you move the up to tdc because of cylinder choke then work the prop back and forth to seat the rings. This cylinder leak down tester gauges leak down tests more accurately than standard compression tests. But can give you a more accurate and detailed picture of the engines overall health. The performance tool w89729 leak down test kit can quickly diagnose internal engine problems such as bad rings valves and leaking head gaskets. Leak down is the percentage of compression that is lost by the engine and every engine has some. A cylinder leak down test requires the removal of all the spark plugs.
Instead of measuring the engines ability to create pressure compressed air is introduced into the cylinder through the spark plug hole. 10 millimeters and 14 millimeters thread adapters dual 2 12 inch chrome bezel gauges and rugged protective outer shell pressure regulated manifold with quick couplers and all comes with an easy to open blow molded hard case for storage. Leak down tests on diesels in aircraft the leak down test is used because you dont want to stand next to a spinning prop doing a compression test. Compressed air 80 to 90 psi is then fed into the cylinder.
Gallery of Diesel Leak Down Tester
