Why would you want to reduce the oil pressure?
Seems normal to me, and as long as your pressure relief valve is working ,
whats the problem?
Andy
>From: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
>Reply-To: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
>To: spridgets@autox.team.net
>Subject: 1275 oil pressure
>Date: Tue, 28 Sep 1999 16:34:03 -0700 (PDT)
>
>Hi all,
>
>I'm still fighting a persistant oil leak on my newly rebuilt 1275 engine
>(all
>new bearings, hepolite pistons, and new 12g940 head, and kent md266 cam and
>lifters). I had installed one of the 'precision' super-flow oil pumps in
>the
>engine, and my normal starting oil presure is between 80-90 lbs, (warm
>california day) and at normal operating temperature (280 degrees), the
>pressure
>will drop to 40lbs at idle, and normally sits at about 60lbs at crusing
>speed.
>Is that normal???
>I notice that after I'm up to operating temperature, when I park the car
>for 15
>minutes or so, I leave a nice healthy puddle of oil (6 inches in diameter),
>and
>when I pull into my drive way, there is a nice trail of drips all the way
>into
>the garage.
>So far I haven't really been able to locate the source, and short of
>'pulling
>the engine, I'm not sure what to do. I think I'll try to degrease the
>engine as
>best as I can with some soap and hot water, and check it over thoroughly to
>make
>sure all the oil has been cleaned off, and then start and run it for a few
>minutes, and see if any oil seeps out. I think I also try using a 'thinner'
>oil
>(10w-40, or 5w-30) to see if that reduces the pressure.
>Other than the persistant leak, the engine seems to be running really
>strong,
>and starts very easily.
>
>BTW - I'm using catrol GTx 20w-50, and a 'spin-on' fram oil filter
>
>Regards,
>Bryan Vandiver (59-bugeye)
>San Jose, CA
>
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