Re: High oil pressure

From: Sam South (sawcut64@mediaone.net)
Date: Wed Aug 01 2001 - 20:59:04 EDT


Well there isn't any leaks at all except from those damn Mopar valve covers,
they leaked on the 318 too, they must be defective I haven't heard of anyone
else with this problem. I guess I'm not used to accurate readings, the last
time I used an Auto Meter oil gauge was on my 1982 Dodge Ram, it had about
15 PSI on the highway and about 3PSI at idle, it still ran for at least a
couple more years after I sold it. Thanks
Sam South
95 Dak, 5.9L,3.90 LSD,5-speed
http://www.twistedbits.net/WWWProfile/dakota/Mt5J8FaDfVCv6/
http://people.mw.mediaone.net/sawcut64/home.html

----- Original Message -----
From: "Bob Tom" <tigers@bserv.com>
To: <dakota-truck@buffnet.net>
Sent: Wednesday, August 01, 2001 4:26 PM
Subject: Re: DML: High oil pressure

> At 03:03 PM 8/1/01 -0400, you wrote:
> >Well I just installed an Auto Meter mechanical oil pressure gauge a
couple
> >of days ago to help keep an eye on the 360 that was installed a couple of
> >weeks ago. The motor has about 1100 miles and I'm running 5 w 30 dino oil
on
> >it now and the oil pressure has me a little concerned. The stock gauge
has
> >always been erratic so I didn't trust it, but when I installed the Auto
> >Meter it shows 70 PSI at idle and as much as 78 PSI when accelerating
> >normally when cold, after it warms up it's at 15PSI at idle and 40-50
> >PSI(depending on what speed) on the freeway, and up to 60-65 under WOT. I
> >don't have a problem with the readings after it's warmed up, but the
70-78
> >PSI when cold seems to me to be a little high, especially as the outside
> >temps are in the 80-90's, what the hell is going to happen when it's cold
> >out. I can't think of anything other than the oil pump causing this,
isn't
> >there some sort of check valve in the pump. Any idea's or suggestions
would
> >be appreciated. Thanks Sam South
>
> I don't think that you're cold start oil pressure is too high, especially
for
> a freshly rebuilt one.
>
> Generally the only "problem" high oil pressure will have is higher oil
> temperature
> and the oil filter gasket leaking (you'll have to get a lot higher to
> explode the oil filter).
> It could also cause the oil filter by-pass to open when the engine is
cold.
> This would
> let unfiltered oil go through the engine (but this happens anyways from
> time to time).
>
> There is an oil pressure relief spring on the oil pump which can be
> adjusted by adding
> or removing shims. Removing shims decreases pressure.
>
> I would just see if there are oil spots appearing on the driveway or road
> after a period
> of parking, or, from time to time, take a look and see if any oil is
> leaking from the
> gasket along the side the oil filter.
>
> Bob
>



This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:02:21 EDT