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I'm currently in the process of reringing/honing my 88' 4.0L renix motor and have hit a problem. All my pistons were stamped '50' on the crown which led me to believe that this motor was once bored over to .020" (.50mm) So I purchased the .020" oversize rings and it turns out they are too large...

Im about ready to drive my new XJ off a frickin cliff!! Let me begin by saying I have been reading the numerous threads regarding low oil pressure, and there seems to be a serious issue with 2000 - 2001 low milage 4.0L XJ's that should have been addressed by DC long ago. I cannot determine...

This question might have an obvious answer to some of you but I need some clarification.... When using plastigauge to measure main bearing clearances in place, doesn't the weight of the crank come into play considering you're taking your measurement at the cap side of the bearing? (ie bottom...