no compressation in cyc 5 - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 07-11-2008, 10:11 PM
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no compressation in cyc 5

i bought a 2000 323ci bimmer and it drove fine when i got it......and now cyc 5 isnt getting any compression and it is a random miss fire.......andone now whats up with it/.
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#2 (permalink) Old 07-11-2008, 11:10 PM
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no compression = misfire.

you can try to put a teaspoon of heavy oil into cylinder 5 and redo compression check. If still zero reading... then it's your valves. If it begins to show some compression, then u have stuck or broken rings
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#3 (permalink) Old 07-12-2008, 02:51 AM
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possible broken piston rings, a blown hole top of the piston from hot spot and prolong pinging, one way to check is to just pull the oil filler cap while it running ( prepare to get sprayed) if its a blow by from the piston, possile collasps camshafter lifter, bent valves. what ever it is will be major!
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