A threaded coupling is screwed into a spark plug hole. Three steps on how to do an engine leakdown test pressure reading.
Modern Vespa Serious About Air Leaks
How to do a leak down test. Lets take a look at how to perform a cylinder leakdown test properly and what you can learn from the results. Toolslets start with the leakdown tester itself. Remove the plug boot from the no. There are basically two different. Instead of measuring the engines ability to. Use the spark plug socket and ratchet to remove the no.
Locate top dead. How to perform a leak down test 1. An engine leakdown test is a compression test in reverse. If youre performing a leak down test on a single cylinder you. When the leak down test tool is attached to the cylinder the next task is to attach the tool itself to the air compressor. Chocks behind the wheels can also be useful.
Make sure the engine is off. Put manual transmissions in gear and firmly set the parking brake to keep the compressed air from turning the engine. Place the car into gear if you can but also engage the parking brake so it wont roll. Youll need a leak down tester industrial grade air compressor one large enough to run air tools a. Compressed air 80 to 90 psi is then fed into the cylinder. Remove the screwdriver and hook the leak down test tool into the spark plug hole.
Insert a large screwdriver or long thin dowel into the plug. A cylinder leak down test requires the removal of all the spark plugs. A common test of an engines ability to compress the air fuel mixture is an engine compression test. The crankshaft is then turned so that each piston is at top dead centre.
Gallery of How To Do A Leak Down Test
