You could have a broke ring, cracked piston or the aluminum between the rings could be broke and or pushed out. The later is what happened to an engine were overhauling. John Hervey -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf Of drdhdmd Sent: Sunday, June 26, 2005 12:37 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Houston, I have a (compression) problem 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 Is there any chance the the # 4 clyinder has stuck rings and can be brought back to life? I remember reading about putting some oil in the spark plug hole and that help you figure out if it is the rings or valves. Any ideas?? or should I convert ot an electric motor 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/