karannair Posted August 3, 2011 Share Posted August 3, 2011 i was told that i should do a compression test on my 2004 325 BMW but i don't know how. can someone please tell me how. thanks Link to comment Share on other sites More sharing options...
Saqir Posted August 7, 2011 Share Posted August 7, 2011 The compression test is not big deal just remove all spar kplugs and block open the throttle plate the compression should be around 140-160psi. Link to comment Share on other sites More sharing options...
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