Right ive just picked my new cossie up and when it is ticking over the oil light comes on so i checked the oil level and it is just under the max so its not that but i noticed when it was ticking over the oil pressure gauge is only reading 15psi and go's upto 40-50 psi when driving.............
Is this ok or should it be higher the car is a 2wd saff and the oil was hot

 

I think it needs to be at least 25psi on tickover, even when hot

Steve.

 

anyone?

 

I thought it seemed a bit low

 

yeah is low.


the light onthe dash is set to come on at 15.

what are you ticking over at?

mine is around 30 psi on hot idle..

 

i thought it was set to 20 psi?

 

the tickover is spot on .........what sort of pressure do you get when driving????

 

First things first - try changing the oil and filter - i reccomend a genuine motorcraft filter, and Silkoline Pro-S 10W/50 - this shoiuld give you a hot idle of between 20 and 30psi at approximately 70 celcius oil temp.


At the moment, i'm using Pro-S 5/40 as the weather has been freezing, but the hot idle never goes below 20psi at 850rpm, and fast running (above 2500rpm) is always between 55 and 60psi when hot

 

mean what rpm are you idleing at?

my idle is 1k that why mines is quite high.

sure i get around 50-60 psi at 3k when hot

 

ticks over about 850-900rpm i still get 50psi when driving never took any notice what it was from cold i was to busy looking around the car.....hope i do not have to pull the engine out already only done 20miles in it ill change the oil and filter tomorow and try that first

 

what is the idle pressure when you start it stone cold?

 

mine is 25 psi on tickover when hot and at about 3000 rpm its about 55-60 psi

 

are you using a cheap mineral oil for running in purposes ?

 

not sure what oil is in it but i know it has just had a 200 block with low comp put in it as the old engine put a rod through the block so it may be on cheap oil.....would this make a differance????not sure it the low comp bit is true though could i check with my comp tester?????

ALL HELP IS MUCH APPRECRATED..

 

your supposed to run a fresh engine on a cheap mineral oil to bed the piston rings in. So the oil could be the cause of a lower oil pressure. I would get the run in period / mileage done then put a decent oil in (not Castrol RS LOL) and see what the pressure is then.

 

Glad this has been posted as im about to plum my oil pressure gauge in at the weekend

 

paul,your car doesnt go BELOW 3000 rpm

 

book say 1.8 bar at idle 2.4 bar at 2.500rpm hth

 

Thats 26.5 psi and 35.3 psi

Steve.

 

cheers...... cossie4i...... i was just working that out but mine is no were near that hope it dose not need a new oil pump not when i just bought it i need to have some fun first

 

was the oil pump not changed when the rebuild was done?


the pump only provides the flow, not the pressure

 

mmmmmm so were do you get the pressure from.....just tryed it from cold and it was exactly 50psi on tickover from cold

 

IMO 50 psi on stone cold isnt enough mate..

the pressure comes form the oil being forced into small places like, bearings cooling channels etc..

as these wear and increase in size it becomes easier for the oil to get in and hence reduces the oil pressure..

i see almost 80 psi on idle if its been lying over nite.

 

Mine is just over 50 on idle. Goes down to 35ish on hot idle.

Steve.

 

As said above,start with the basics,good oil/filter etc

Could be a dodgy/cheap gauge

Get pressure tested at a garage with a proper pressure tester if your really worried

If the worst comes to the worst an oil pump is a lot cheaper than a re-build m8,not worth giving it any grief if you suspect the pump