 Very high Oil Pressure when cold ..., how much is too much? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| SirAndy |
  Apr 11 2008, 10:51 PM
Post
#1
|
|
Resident German  Group: Admin Posts: 41,640 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California  |
so now that my new engine harness is in and all the gauges work as they should, i see that my oil pressure is way high when the car is cold.
i have the 1 - 5 bar(?) gauge for the oil pressure with the matching sending unit. when i start up the car cold, the needle pegs out at the top, slightly above the 5. it will stay there until the thermostat opens, which seems to be right around 200 F ... once the TStat is open, the pressure will drop to ~2 at idle and goes up to 5 under load/throttle. the real issue here is that on a rather cool day/night, like this morning for example, i drove for about 1 hour and the temp never got to 200 and the thermostat never opened. how long can i run the motor with that much oil pressure? what damage could i be looking at? any suggestions? ignore it? (IMG:style_emoticons/default/confused24.gif) Andy |
   |
 
|
  |
Replies(1 - 6)
| SLITS |
Apr 11 2008, 11:47 PM
Post
#2
|
|
"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
My 2.4 & 2.7 throw 10 bar on startup ... If they don't suffer from bearing pitting / surface sloughing from 150 psi, then I would hazzard a guess that it wouldn't hurt yours.
But I ain't no Porscheee expert. |
 |
|
| charliew |
Apr 12 2008, 09:10 AM
Post
#3
|
|
Advanced Member Group: Members Posts: 2,363 Joined: 31-July 07 From: Crawford, TX. Member No.: 7,958 |
I would think the main concern would be the filter exploding or the filter gasket blowing out. You should try a thinner oil because the thicker oil moves much slower and startup wear is the most wear a motor gets. The thinnest oil you can run and keep reliable pressure when hot is the best thing you can do for the motor. Also the more the oil pump has to recirculate the oil in itself the more it aireates (bubbles) the oil. Ask Jake.
Charliew |
|
|
|
| ConeDodger |
Apr 12 2008, 10:57 AM
Post
#4
|
|
Apex killer! Group: Members Posts: 23,588 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California 
|
My 3.2 does that as well... I would think it isn't a problem as long as the filter has a pressure relief system...
|
|
|
|
| r_towle |
Apr 12 2008, 12:02 PM
Post
#5
|
|
Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
|
both the 944 and 928 peg the stock gauges at start up.
It may just be a porsche thing. Rich |
|
|
|
| thesey914 |
Apr 12 2008, 03:21 PM
Post
#6
|
|
Senior Member Group: Benefactors Posts: 1,155 Joined: 1-January 03 From: Staffordshire -England Member No.: 66 |
Mine does the same. I was worried to start with but I checked the relief pistons thinking they were stuck and they were fine.
From what I've read the pistons open around 90psi (my gauge is 140 psi version) My gauge was pegging and I've worked out my sender is wrong -it's reading 140 ohms which is the max it should read. Mechanical oil gauge proves i'm running 90psi rather than the 150 the gauge is showing. 10/50 oil in 2.4 |
|
|
|
| SirAndy |
Apr 14 2008, 06:52 PM
Post
#7
|
|
Resident German Group: Admin Posts: 41,640 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Spoke to Rich @ Jerry Woods ...
Nothing to worry about, all is good ... (IMG:style_emoticons/default/shades.gif) Andy |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 02:25 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.