Join Date: Dec 2000
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Re: Rebuilding a 2.5L?
There are a few things i'ld look for.
How's the oil pressure? At start? When hot? Can you get someone to run an exaust analysis? If not, check out the usual things, or have a machine shop you trust look it over
All bearings, rings, wear on the cylinder walls. Cam lobe heights, valve wear and carbon buildup, valve seats, timing chain play, any other clearances.
Definitely replace the valve seals while it's open. i've been told there is some solution you can put into the combustion chamber that completely dissolves all carbon buildup. Not sure if this is true.
My first guess on the high rpm smoke would be the oil control piston rings if the smoke is grey/black. Unless it's fuel related.