Post up your Compression Test results

Air, fuel, and a spark, thats what makes every one of these Bavarian powerhouses churn at up to 7000RPM. Discuss all 1992-1999 BMW 3 series motors here. Including all M50, S50, M52, S52, M42, and M44 variants.

Average of all 6 compression test results and PSI deviation

170-180 PSI
0
No votes
180-190 PSI
0
No votes
190-200 PSI
0
No votes
200-210 PSI
3
27%
210-220 PSI
0
No votes
220-230 PSI
2
18%
230-240 PSI
1
9%
240-250 PSI
0
No votes
250-260 PSI
0
No votes
260-270 PSI
0
No votes
____________
0
No votes
0-5 PSI range
4
36%
6-10 PSI range
1
9%
11-15 PSI range
0
No votes
16-20 PSI range
0
No votes
21-25 PSI range
0
No votes
 
Total votes : 11

Post up your Compression Test results

Postby Caligula » Mon Jun 27, 2011 5:16 am

For those that have done the important diagnostic of preforming a compression test, we want to hear from you! We would like to start a reference of what the most common results are for this important measure of your engine's performance. This can apply to all M/S50 and M/S52 model engines, NO 318's please. What we do not want added to this list are boosted or race preped engines as these may not coincide with the output you would receive on a stock engine. As well anyone who has a 25psi or greater deviation from your highest and lowest PSI reading should not add their results as your engine is not performing within normal standards.

Below are a set of average ranges, and PSI deviations. The upper set of numbers should represent the mean average of ALL SIX individual compression tests. For example if your results are: 215, 220, 225, 225, 220, 210, your average of all six would be 219.

The lower set of numbers should be the PSI deviation from your six compression test results. This is the difference between the highest and lowest numbers you recorded when performing the tests. If using the numbers in the example above, your deviation would be 15psi.

Please post up with your poll results any modifications done to your engine along the lines of head work, head gaskets, or aftermarket cams, as well as any oil additives used. As well be sure to add your car to the garage so we can see what type of engine your reporting on.

For a guide on preforming a compression check on your E36: coming soon
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Re: Post up your Compression Test results

Postby euro2fast4u » Tue Aug 02, 2011 7:14 am

hmmm great idea. im still scared to do this test but i should
http://www.youtube.com/watch?v=fAdBeu3Z-Vw
"im gonna fuck the integral of your pussy with the derivative of my dick"
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1993 Fairlady

Re: Post up your Compression Test results

Postby Supafly » Thu Jan 26, 2012 1:00 pm

Mine were all 15bar with cylinder 2 15.1bar and cylinder 1 14.95bar.

Engine is a standard m52b28 alloy block U.K car. Has had head gasket replaced, I believe standard head gasket.
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Re: Post up your Compression Test results

Postby roadrunner » Sun Feb 19, 2012 1:36 pm

14.3 bar liniar compression e36 m50b20 vanos 1993 -never opened
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Post up your Compression Test results

Postby Susanver » Sun Oct 27, 2019 1:45 pm

If you've just posted something, like within a few minutes, you'll see two boxes at the top right corner of the box containing your post. One says "
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