View single post by Judson Manning
 Posted: 02-26-2006 08:38 pm
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Judson Manning



Joined: 03-14-2005
Location: Atlanta, Georgia USA
Posts: 406
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 I have witnessed this correlation between oil pressure and throttle position that you are describing in several JHs.  However, the difference I've seen is only around 5psi, and the oil/filter won't make any difference.

Chalk it up to a well used engine with worn bearings and/or worn oil pump rotors. 

Between the aluminum block and 360^ grooved bearings, this isn't uncommon and nothing to worry about.  The only 'fix' would be to use a x-drilled crank, 180^ bearings and a 'beefier' set of main bearing caps.