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Had compression test and leak down done, these numbers good?

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Old Dec 1, 2004 | 08:01 PM
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Default Had compression test and leak down done, these numbers good?

Just wanted to get an idea about the general health of the innards. I've been running it pretty hard since putting the cam and pulley in last winter. Engine has 56k miles on it now.

Cyl Comp Leakdown%

1 170 95
2 170 92
3 170 95
4 170 90
5 170 90
6 170 90
7 165 95
8 165 95

This was done while the engine was fairly cold. How's it look?
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Old Dec 1, 2004 | 11:24 PM
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Originally Posted by IFLUBYU
Just wanted to get an idea about the general health of the innards. I've been running it pretty hard since putting the cam and pulley in last winter. Engine has 56k miles on it now.

Cyl Comp Leakdown%

1 170 95
2 170 92
3 170 95
4 170 90
5 170 90
6 170 90
7 165 95
8 165 95

This was done while the engine was fairly cold. How's it look?
I think you want to do the leakdown when the engine is hot/operating temps. That should maximize ring/cylinder sealing. Then you want no more than 10% leakdown ( so 90% would be fine). I would think yours would be significantly better when hot.

Maybe one of the Gurus will chime in?????
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