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Compression Range in B20 F? 140-160

posted by  Blue Horse on  Thu Oct 23 10:39 CST 2008
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last visit: Mon Apr 8 17:57 CST 2013
[RELATED]

Those numbers may be OK, thoughat first glance they seem on the low side. Not all gauges read the same. The good part is that they are within a 10% range, which is acceptable. Try a wet compression test (a squirt of oil in each cylinder before you put the gauge in the hole) and see if it changes much. If it increases considerably, you have worn rings. Does the engine seem to use a lot of oil not accounted for by leaks, or are there other symptoms of wear? An engine with a lot of blow-by will often spew oil out the vents of the filler cap on long fast highway runs. Did the plugs look oily or otherwise fouled? Is the inside of the tailpipe oily? (dry black soot, sometimes almost fluffy, is normal, slimy is not)






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