From:Tim Roller>magnum318@bewellnet.com
>I don't have the printed gauge setup in my '95,but from experience on stock
motors the builders generally build oil pumps where there is minimum 10lbs
oil pressure for every 1000 rpm, so if you read at least 25 lbs at idle-you
are safe.All oil pumps also have a limiter spring in them to limit the high
side pressure so as not to blow out gaskets that weren't made for such high
oil pressures unless you swap in a new "high volumn" or "high pressure" oil
pump and also update all the gaskets to high performance type. As to why it
would be so radical all of a sudden it may be your oil sending unit, because
of all the different oils and additives being used,because the sending unit
has at all times been givin a different pressure due to the different oils
and their viscosities. Try running with a good oil and stay with it and its
viscosity whether it be a mineral oil or synthetic and your sending unit
should stabilise. Hope this helps, if it doesn't stabilise within 1-week, I
would change out the unit
> As to my oil pressure it comes up about half way on the gauge when idling
and when road cruising will go to 3/4 way to the high side which for my
truck has been normal since I got it. It does go to the low side when it is
about to change oil at about the 3000mile mark but I don't let it get that
far, I change my oil between 2500 to 2800 miles,after noticing the pressure
drop from what I consider normal
-----Original Message-----
From: STRICKLAND, Tate <tstricklan@shl.com>
To: 'dakota-truck@buffnet.net' <dakota-truck@buffnet.net>
Date: Wednesday, July 15, 1998 12:19 PM
Subject: DML: Oil pressure drop!!
>I have a puzzling and scary situation with my 97 RC 5.2. Since I got
>the truck new, the oil pressure has NEVER read below or above 60-80
>lbs. It went up slightly (1mm perhaps) when I installed synthetic,
>but that's it. When I would rev the motor, the needle would increase
>slightly. Didn't matter if I was idling or flooring it 60-80 lbs (hard
>to guess with these non linear values on the gauges - about 1/4to the
>right of center on that "0"-"40"-"110" crazy thing). No mods except
>for the TB smoothing and plug wires. Check engine light has been
>coming on every few days since the plug wire change - started the
>truck with an electrical connector plugging into a vacuum tree mounted
>near the driver's rear of the intake unplugged (sorry - don't know
>what to call it - paid for my manual, but it's not in yet). Got a
>check engine light - plugged it back in - still got the light (running
>perfectly). Unplugged battery - voila - no light. Two days later -
>light comes on - go to dealership and they reset "upstream o2 sensor
>open to voltage" error - no light - two days later - light. - I unhook
>battery, no light, ect (just waiting for an opening where I can see
>the dealer - they're always busy). Oil changes have been dealer,
>dealer, dealer (10w30 natural I guess), castrol 10w30, syntec 5w50
>with magnetic drain plug, syntec 5w50, and syntec 10w30 (where I'm
>staying) with a dose of Prolong oil treatment. 5,000 mile changes
>with the synthetic and filter changes at each 2500miles with the
>synthetic.
>
>I pull into the barber shop parking lot yesterday afternoon and looked
>down at my oil pressure - 25-30 lbs!!! About an eighth of an inch to
>the left of center!!! Sh!t fire - I thought I was gonna have a
>cardiac! If I shut her down for a while, I can go out and start up
>and the oil pressure goes to 60-80 and stays there till I come to my
>first stop or depress the clutch for any length of time, then I'm back
>down to 25-30. Give it gas and the pressure rises to "normal"
>(60-80). Varies with rpm by a wide margin now.
>
>Any ideas on why this changed all of a sudden???
>
>To anyone who actually reads all of this long winded thing - thanks
>for at least reading it! What do y'alls oil pressures look like???
>
>Tate
>
>
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