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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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Join Date: Nov 2012
Location: North Jersey
Age: 32
Posts: 8
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Compression test help
I have a blacktop sr20 (I believe it's stock as that's what I was told) the car never gets driven as it's a project car.
Anyways i live in jersey and its been sub 30 degree weather lately. I decided to do a compression test to have an idea of how healthy the engine is. Well I'm a bit thrown off and confused. Compression test cold 1 - 124 psi 2 - 119 psi 3 - 125 psi 4 - 125 psi Now I also decided to do a warm test (this is where I'm confused) the compression numbers are very similar to the cold test. So I decided to put some oil in each cylinder to see if the numbers jump. 1 - 150 psi 2 - 145 psi 3 - 150 psi 4 - 150 psi Now I know that when the compression numbers jump it usually means bad rings, however I'm confused as to why the compression remained the same between cold and warm. 🤔 Maybe I didn't wait long enough for the engine to warm up? no prior symptoms no lack of power or anything to have me question the compression I did it just so I know where I'm at. Any input is appreciated 😬 |
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compression, low, piston rings, s13, sr20 |
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