Posted by Al Evangelista on August 17, 2000 at 19:06:02:
Team,
Some of you may recall my post a few months back having to do with low compression in number 5 cylinder. I appreciate the many helpful comments which I received regarding this problem. The ultimate problem turned out to be... BOTH compression rings broken in multiple places. (8 pieces total). I was initially led away from considering rings due to the good condition of the cylinder wall.
My plan now is to replace all rings as well as the exhaust valves. Oil pressure is OK so I'll leave the bearings for another time. My very general question is: What special considerations are there in doing rings and valves.
As best as I can tell from my dial caliper the pistons are standard size. I was not able to determine cylinder 'circularity' as I don't have the proper tools. My inclination is to accept any risk associated with not micing the cylinders.
My general plan for rings is to:
* use a ridge reamer on the tops of each cylinder (not done for extraction of #5 piston but will be done before replacement with new rings)
* hone each cylinder with a dingle ball hone
* wash cylinder walls w/soap & water (technique for keeping crank journal clean??)
* replace rings & reassemble using original rod bearings using assembly lube(suggested by Louie S)
My general plan for valves is to:
* lap new valves in with compound (how long / how much / technique here??)
* carefully clean up compound (best approach for keeping compound out of engine?)
* reinstall w/original springs & keeper (worth spending cash for new ex springs?)
I would appreciate any general experience-based advice here as I have not done either of these jobs in the past.
As always, thanks for the assistance.
-Al