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The BMW Range
3 Series
E36
Me and my E36
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<blockquote data-quote="anxious" data-source="post: 316929" data-attributes="member: 193"><p>I think 110-115psi may be a bit low.</p><p> </p><p>However See <a href="http://www.unitedbimmer.com/kb-e36-spark-plug-replacement-and-compression-test.php" target="_blank">http://www.unitedbimmer.com/kb-e36-spark-plug-replacement-and-compression-test.php</a></p><p> </p><p>Where the author said:-</p><p> </p><p><em>"My results were 230-230-230-223-224-232, pretty good for 146k miles on this engine. The most valuable information you can derive from a compression test is really just how close the cylinders come to each other. An acceptable result would be that they fall to within at least 85% of the highest reading. For instance, my highest was 232psi, so the minimum for the others should be at least 197psi. But more ideally, the figures should be within 5-10psi of each other. If you have a cylinder that is drastically off compared to the others, retest it to make sure you didn’t get a bad reading. <strong>And while the minimum pressure for an E36 is 142-156psi, low numbers themselves do not necessarily mean engine trouble. </strong>A lot of factors affect gauge readings: the gauge itself, incorrectly adjusted valves, premature camshaft wear, altitude, temperature, and even the condition of your battery can retard the readings. Those who run aggressive cams will typically produce lower than average numbers as well. The important thing is that whatever the actual numbers are, they shouldn’t vary too greatly from each other."</em></p><p> </p><p> </p><p> </p><p> </p><p> </p><p>So I think dont worry too much about the engine.It should be fine as long as there is no engine oil consumption and no rattles from the engine or the exhaust.</p><p> </p><p>Remember you just changed the engine oil. Thats should be good for at least anorther 10000km.</p></blockquote><p></p>
[QUOTE="anxious, post: 316929, member: 193"] I think 110-115psi may be a bit low. However See [URL]http://www.unitedbimmer.com/kb-e36-spark-plug-replacement-and-compression-test.php[/URL] Where the author said:- [I]"My results were 230-230-230-223-224-232, pretty good for 146k miles on this engine. The most valuable information you can derive from a compression test is really just how close the cylinders come to each other. An acceptable result would be that they fall to within at least 85% of the highest reading. For instance, my highest was 232psi, so the minimum for the others should be at least 197psi. But more ideally, the figures should be within 5-10psi of each other. If you have a cylinder that is drastically off compared to the others, retest it to make sure you didn’t get a bad reading. [B]And while the minimum pressure for an E36 is 142-156psi, low numbers themselves do not necessarily mean engine trouble. [/B]A lot of factors affect gauge readings: the gauge itself, incorrectly adjusted valves, premature camshaft wear, altitude, temperature, and even the condition of your battery can retard the readings. Those who run aggressive cams will typically produce lower than average numbers as well. The important thing is that whatever the actual numbers are, they shouldn’t vary too greatly from each other."[/I] So I think dont worry too much about the engine.It should be fine as long as there is no engine oil consumption and no rattles from the engine or the exhaust. Remember you just changed the engine oil. Thats should be good for at least anorther 10000km. [/QUOTE]
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