![]() It should slip, then abruptly catch and almost stop, then slip again, almost stop, slip, stop and on and on, sort of like it's lurching. The desired result is a slow, jerky motion that does not gain much speed at all. (Obviously, hill steepness is a variable here.) It's a matter of HOW FAST it rolls, HOW QUICKLY it GAINS SPEED and HOW SMOOTHLY it does so. Now release the brakes and observe the car's behavior. ![]() Put it in 1st gear, set e-brake and release clutchĭepress brake pedal and release hand brake Turn the ignition off (not just the engine)Ĥ. Go find a relatively steep hill or driveway with at least 12 feet of smooth, driveable area That being said, here's what you need to do: IF YOU SUSPECT YOUR ENGINE HAS FAILED DUE TO LOSS OF COMPRESSION BUT HAVE NO WAY TO TELL FOR SURE, THIS WILL GIVE YOU A DEFINITIVE CONCLUSION. IT'S PURPOSE IS TO AID IN TROUBLESHOOTING AND DIAGNOSING SPECIFIC SITUATIONS WHERE THE MALFUNCTION COULD BE COMPRESSION RELATED BUT MAY NOT BE AT ALL. THIS TEST DOES NOT PROVIDE NUMBERS THAT ARE DIRECTLY RELATED TO PSI OR RPM. THIS IS A RUDIMENTARY PROCEDURE PROVIDING RESULTS WHICH CONTAIN INFORMATION THAT IS USEFUL IN DETERMINING THE GENERAL STATUS, OR OVERALL COMPRESSION "HEALTH" OF A ROTARY ENGINE IN MODELS EQUIPPED WITH MANUAL TRANSMISSIONS ONLY. For example, let’s say we get 90psi, 100psi -90psi equals 10psi, or 10% leakage.I'm going to be as clear as possible here. Leakage will be 100psi minus recorded pressure. NOTE: Do not have any hand tools attached to engine as it may rotate under pressure. Look under radiator cap for air bubbles indicating a bad head gasket.
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