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heyjanicholson

A

Anonymous-0

Well-known Member
Well I took the head off my 300 today that was pushing a lot of oil out the breather and was thinking I was going to find a really bad scored sleeve but it wasn't ! Tomorrow I will pull that piston to see if maybe it has a broken ring ! Had that low compression on number two but sleeve looked ok ! Tried the tranny oil trick for stuck rings and didn't do anything ! Any other ideas would be helpful but think now I might just as well put new sleeves and piston in it ! By chance could this possibly be a head or valve problem ? I am guessing not since that would not have much to do with the low compression ! Thanks !
 
Measuring the cylinder, and getting the rings off of the pistons is next. If they are good, maybe just a glaze break and rering . Measurement is the key to knowledge. Having the head cleaned and new valve seals put on would also be best practices. Any out of round, or taper measured just where the top ring stops its travel. .004 taper is probably max allowable. Out of round at .002 is too much.
Use proper bore measuring gauges and micrometers, not a caliper. Jim
 
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