Honda civic diagnosis part ii cylinder leak down test duration. A cylinder leak down test requires the removal of all the spark plugs.
Leimo Cylinder Leak Down Tester Compression Test Kit Engine Cylinder Dual Gauge Leakdown Tester Kit Diagnostics Tool
How to do a cylinder leak down test. Youll need a leak down tester industrial grade air compressor one large enough to run air tools a ratchet extension. An engine leakdown test is a compression test in reverse. Read and interpret the test results. Unlike a compression test a leak down tester has two gauges and requires a compressed air source. The crankshaft is then turned so that each piston is at top dead centre. How to do a cylinder leak down test on an e46 bmw duration.
Once the piston is at tdc of the compression stroke air pressure is introduced through a cylinder leak down gauge. The right hand dial will give a reading as a percentage. Hook up the tester. Instead of measuring the engines ability to create pressure compressed air is introduced into the cylinder through the spark plug hole. Like a compression test a leak down test is accomplished by replacing a spark plug with the tester hose. Be careful when introducing air pressure into the cylinder the piston can suddenly travel downward.
Always make sure to test cylinder leakage with the piston at the top of the cylinder. Compressed air 80 to 90 psi is then fed into the cylinder. The resistance from the other spark plugs helps resist this downward movement. A threaded coupling is screwed into a spark plug hole. Remove the spark plug and place the problem cylinder at tdc top dead center of the compression stroke. Once the compressor hose is connected turn the regulator clockwise to allow the air to flow into the cylinder.
When the leak down test tool is attached to the cylinder the next task is to attach the tool itself to the air compressor. It does little good to measure leakage with the piston at. How to perform a leak down test. This is where the greatest cylinder wear occurs. Remove the spark plug on that cylinder only. One of the gauges on the tester shows the pressure at which the cylinder is being pressurized.
Locate top dead center.
Gallery of How To Do A Cylinder Leak Down Test
