High Oil Pressure

[RA Dunk]

on a cold start my oil pressure seems to be through the roof, its ideling at 90lb and sitting at over 100 through town 20 30 MHP took it for a run to get it fully up to temp, when fully warmed up its sitting at about 60 when ideling and 80/85 when on the move depending on revs etc

stopped to go into shop came out fired it up and was ideling at 40 then going up to 90 odd LB

any suggestions, im hoping its just a fooked guage or sender cable but im not very techie minded

[JohnSt]

Right, what you need to do here is get the engine out, remove the oil pump and get someone to x-ray it for hairline cracks. Next step is a full strip down and ....

Seems fine to me, the only problem I see there is you are not working it hard enough to get oil temps up at hot idle to cause the pressure to drop to Circa 30-40 psi. ECU must have a Poofy Driver compensation table enabled !! I didn't spec that !!!!!!!!!!

[RA Dunk]

Right, what you need to do here is get the engine out, remove the oil pump and get someone to x-ray it for hairline cracks. Next step is a full strip down and ....

Seems fine to me, the only problem I see there is you are not working it hard enough to get oil temps up at hot idle to cause the pressure to drop to Circa 30-40 psi. ECU must have a Poofy Driver compensation table enabled !! I didn't spec that !!!!!!!!!!

double lolol ya cheeky Bast!!!!

never seen the pressure anywhere near 100LB up to today though John, almost sh@t myself when i first saw it, ok might i add that my guage only goes up to 100 and it was past that although only just maybe 110 max

so should i be worried?

[RA Dunk]

what running pressures should i normally be sitting at

A ) from a cold start

B ) when warm

Edited August 15, 2008 by Ac!D

[JohnSt]

I think I'd check sender and gauge first. I wouldn't worry to greatly about pressure being to high, you might have an issue, most likely instumentation put possible pump, but 100xbetter that than to low

Edited August 15, 2008 by JohnSt

[RA Dunk]

oky doky cheers John, just got a bit worried when i seen it go off the guage thats all

[JohnSt]

Cold idle usually around 6 bar (90psi)

Hot idle usually around 2-4 bar (depends how hot )

Anything off idle > 6bar

[fai17]

Mine cold idle at nearly 7 bar but its going nowhere the now

[RA Dunk]

Cold idle usually around 6 bar (90psi)

Hot idle usually around 2-4 bar (depends how hot )

Anything off idle > 6bar

oky doky, im gonna be keeping an eye on it none the less

[emoe]

oky doky, im gonna be keeping an eye on it none the less

Acid when did you last change the oil? what oil did you put in there?

Also is the breather from the crankcase blocked up a bit? When it gets hot it will become more supple and the vent can work properly.

Just some suggestions!

[RA Dunk]

oil was changed about 6 month ago, its due for an oil change now, come to think of it the car hasnt really done much miles since the last change TBH

[emoe]

oil was changed about 6 month ago, its due for an oil change now, come to think of it the car hasnt really done much miles since the last change TBH

Id check any breathers mate, if its been sitting you never know. With short journeys, condensation builds up in them and they start to clog.

They dont normally clear until the engine is really hot, and the gunk melts a bit. But as soon as it cools again, youll end up with a clogged breather and high presure at the crank again.

Have you tried starting the car from cold, then undo-ing the oil filler cap or pulling the dipstick? see how much pressure is there, its a quick way to check if the problem is serious,

[RA Dunk]

Id check any breathers mate, if its been sitting you never know. With short journeys, condensation builds up in them and they start to clog.

They dont normally clear until the engine is really hot, and the gunk melts a bit. But as soon as it cools again, youll end up with a clogged breather and high presure at the crank again.

Have you tried starting the car from cold, then undo-ing the oil filler cap or pulling the dipstick? see how much pressure is there, its a quick way to check if the problem is serious,

ahh good thinking bat man, i hadnt thought of that, will try that as soon as the car cools down a bit, so what do i do just let car cool, start car, check pressure, remove oil cap then re check pressure to see how much it falls?

[emoe]

ahh good thinking bat man, i hadnt thought of that, will try that as soon as the car cools down a bit, so what do i do just let car cool, start car, check pressure, remove oil cap then re check pressure to see how much it falls?

Actually, i was talking about starting the car when cold. then while its idling, remove the oil cap and you will feel the pressure venting from there if its high.

Of course it may well lower the guage too. If thats the case then i woulc say you have crank pressure due to a blocked breather.

[pmacFTO]

Sorry to bring this back from the dead but I have just been to get some oil from Extreme in Whitburn and they warned me not to take my car to Holland (leaving in 2 hrs ) The oil pressure gauge (Racetech one) is reading 60lb on idle and going up to 100lb when driving normally. I've organised breakdown cover and extra travel insurance etc for the car now and I'm gonna have to take our other car which currently has a binding brake at the rear

Is that pressure too high - I'm sure it always sits at about 80...temp is fine. The car did take 3L of oil tho! So something must not be right.

Edited November 10, 2008 by pmacFTO

[RA Dunk]

is it doing it from cold start or when fully warmed? mine goes up to about 100 when cold but drops back to 80 on idle when fully warmed

[pmacFTO]

It's about 60 on idle warm and going up to 80-100 when driving. Called Duncan for some advice so just seeing what the consensus is. Just checked the oil but it's at F on the stick and not overfilled which Hypertech said to make sure of. I'm sure it's always about 80 but it may just be a faulty sender?

[RA Dunk]

hmm dosent seem to be too far away from mine, like John ST says its 100 times better to have to high a pressure than too low, i would take it to a garage for piece of mind before you set off on your trek though

[RS Grant]

Cold start and cold idle on the SpecG can see 7.5 bar... under normal conditions, fully warmed up, it peaks around 6.5 bar tops.

Once warm, it will sit around 2-2.5 bar at idle.

Cheers,

Grant

Edited November 10, 2008 by RS Grant

[thewelsho]

Right, what you need to do here is get the engine out, remove the oil pump and get someone to x-ray it for hairline cracks. Next step is a full strip down and ....

Seems fine to me, the only problem I see there is you are not working it hard enough to get oil temps up at hot idle to cause the pressure to drop to Circa 30-40 psi. ECU must have a Poofy Driver compensation table enabled !! I didn't spec that !!!!!!!!!!

LOL!

[pmacFTO]

Well after a nervous drive to Newcastle, a toddle round Holland, and a much less nervous drive back today I can say the car is fine so far! I have it booked in to get looked at so we'll see what happens