compression test, how are these results
06-30-2006, 12:42 PM
#1
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compression test, how are these results
I just got my s2000 2 days ago, 2000 with 45k miles.
I just did my compression test, the car was not fully warmed up, I let it sit for about an hour after driving. But my results were
1 - 190
2 - 187
3 - 193
4 -195
How are those results? Seems a tad low to me...would I have gotten a bit better specs on a fully warm engine?
thanks
I just did my compression test, the car was not fully warmed up, I let it sit for about an hour after driving. But my results were
1 - 190
2 - 187
3 - 193
4 -195
How are those results? Seems a tad low to me...would I have gotten a bit better specs on a fully warm engine?
thanks
06-30-2006, 02:02 PM
#3
Yeah, they're within a couple percent of each other which is good.
Shop manual says:
135 PSI Minimum
228 PSI Max
28 PSI cylinder to cylinder variation.
If you're still worried, a leak down test is far more accurate. I think it sounds fine.
Shop manual says:
135 PSI Minimum
228 PSI Max
28 PSI cylinder to cylinder variation.
If you're still worried, a leak down test is far more accurate. I think it sounds fine.
06-30-2006, 06:08 PM
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Well I returned the gauge suspect of the readings I was getting because I did it again and it got lower readings then the 1st time.
Does anyone have recommendations for a compression gauge? Is the ones at Schucks/Kragens or the Actron one at sears good?
Does anyone have recommendations for a compression gauge? Is the ones at Schucks/Kragens or the Actron one at sears good?
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06-30-2006, 06:29 PM
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yea wide open
also, I only let it crank for about 3-4 seconds, im probably just too paranoid because of the new car but the 2nd test results seem weird so I think Ill try another brand gauge.
Too bad Im not in Phoenix, I would have been able to use my schools snap-on compression gauges which Ive used before on other cars and was very accurate.
also, I only let it crank for about 3-4 seconds, im probably just too paranoid because of the new car but the 2nd test results seem weird so I think Ill try another brand gauge.
Too bad Im not in Phoenix, I would have been able to use my schools snap-on compression gauges which Ive used before on other cars and was very accurate.
07-01-2006, 06:28 PM
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alright, here is what you should do.
Get your gauge, make sure the motor was just turned off, take all the plugs out etc.
have someone watch the gauge, throttle wide open, crank it about 5 times, stop, then crank it about 3-4 more.
use those as your readings.
If you do not have a leakdown test, take about a half a teaspoon to a teaspoon of oil and put it in each cylinder hole, and retest.
If results are higher you could have blowby, by the rings...this is only if it is a significant amount higher than the previous test.
post em up and I'll try to evaluate them for you.
Get your gauge, make sure the motor was just turned off, take all the plugs out etc.
have someone watch the gauge, throttle wide open, crank it about 5 times, stop, then crank it about 3-4 more.
use those as your readings.
If you do not have a leakdown test, take about a half a teaspoon to a teaspoon of oil and put it in each cylinder hole, and retest.
If results are higher you could have blowby, by the rings...this is only if it is a significant amount higher than the previous test.
post em up and I'll try to evaluate them for you.