Quote:
Originally Posted by vex
There's a poor mans compression test, it's not accurate, but it might give you a digital reading of either the engine is blown or not, but not if it's got low compression.
With the car warm: Remove EGI fuse, have friend hold accelerator down, pull leading plug on one rotor, listen for 3 even large pulses. If the engine is not significantly warm (as in you're not shooting out hot air or fluids from the spark plug) you can put your hand close to the spark plug hole and feel the pulses to judge the strength of the seals. Repeat for the other rotor.
With the car cold (will not be as accurate for when it is warm): do the same as above but put your finger over the spark plug hole and make a seal. have your friend crank it. If your finger comes off the hole with the pressure, you have okay compression. If it does not, you do not have good compression on that rotor. (your finger should come off 3 times per orbit of the rotor).
Disclaimer: These tests are significantly inaccurate and will only allow you to know if your engine is blown/not blown. See Teds post for more information
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Thx for the detailed info, I'm going to head out and take a look at it.
Quote:
Originally Posted by To_Slow
Get a piston compression tester from your local auto parts store.....
That will give you an idea on your compression #...
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I actually have one I just wasn't sure if that would work correctly?
Quote:
Originally Posted by Cp1
you can use a regular piston compression gauge but you have to remove the valve that Holds the reading. then crank it over with the egi fuse removed and watch for the height of the needle to get your readings.
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I'll have to try that also, I have one sitting in the garage. thx for the info