Run the test again, but this time put a couple of teaspoons of motor oil into cylinder 4. If the compression comes way up, you have a ring problem in that cylinder. If it doesn't suspect valve related problems. To find out for sure what is going on, a leak-down test will pinpoint the issue for you. -Joe Kuchan >From: "drdhdmd" <doctorDHD@xxxxxxx> >Reply-To: dmcnews@xxxxxxxxxxxxxxx >To: dmcnews@xxxxxxxxxxxxxxx >Subject: [DML] Houston, I have a (compression) problem >Date: Sun, 26 Jun 2005 18:37:28 -0000 > >So while I was wasting time waiting for the penetrating oil to work >into the bolts holding down the coolant Y pipe, I thought it might be >a good time to check the cylinders for compression. My results are >less than promising. > >Cylinder# Comp 1st run Comp 2nd run Insulator Appearance > 1 140 155 Black and sooty > > 2 115 125 White like brand new > > 3 107 120 Tan > > 4 40 40 Tan and wet with wet > black but not oily electrodes > > 5 140 140 Off-white > > 6 113 115 Tan To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/