SWIFTY

whats your oil pressure on idle???
mine is about 15 is that right? when i rev it, it goes up so that means my oil pump is working dont it??






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SWIFTY

just got this IDLE SPEED 1.8 BAR (26 PSI)
2000 RPM 2.4 BAR (35 PSI)


off
http://www.grahamgoode.com/cosworth/tip.htm

so why would mine be down??
should i be worried?
could it be down to rong oil???
what oil should i use?? its a 2wd stage 3


thanks

ickey818

Oil pressure on my saph is normally between 25-30psi on hot idle depending on how hard i've driven it, at normal cruising speed pressure sits between 60-65psi. I use Silkolene Pro-S 10W50 oil.

Danster76

iTrader: (2)

Would incorrect oil affect pressure. Say Mob1 0-30 for example, would this cause lower pressure? Have been thinking about this...

GUZZLER

iTrader: (3)

yes it can make a difference, Ickey has a good choice of oil, Silkolene Pro-s 10-50, oilman is doing a deal on silkolene at the moment.

Danster76

iTrader: (2)

what kinda deal, delivered and in what quantity?

COLEYST200

iTrader: (3)

When my car had 11 psi on tick over this is wot was doing it on my motor









SO GET SOME GOOD OIL IN IT MATE AND KEEP THEM CROST

MARCOSWORTH

iTrader: (24)

Mine on idle (hot) is 25 psi and on normal driving around 60 also with Silkolene Pro S 10w50 like ickey818

tabetha

A 0-30 would be like dishwater to an engine like this, as said go for 50/60 weight.
tabetha

WongRS

iTrader: (11)

thin oil definatly makes the pressure drop, i ran my 309 on something pretty thin, and on very hot idle, pressure was so low it was off the gauge, put 20/50 in and it was always nice and high.

SWIFTY

i have put 10w 40 in it at the mo as i will be changing it again soon.
i just started it and it shot up to 120psi and started to drop as it warmed up.

SWIFTY

didnt your oil light come on????

SWIFTY

Any more ideas why it would drop so low on idle its fine when drivin and when first start it.


Im worryed now that its doin damage as it gets lower on idle it dont get more tappaty or anything. Could it be a fault gauge.





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TurboShed

Well, the reason it's fine when it's cold is the oil is nice and thick, and when you're driving the oil pump is running a lot faster. So, your engine is either fubar or your oil needs to be thicker.

10-40 is too thin for a Cossie. Drive it nice and gentle until you put some thicker oil in it.

dojj

iTrader: (3)

35psi i would say is too low for the engine
then again, 120psi is way to high as well

you want the oil to be at between 45 and 65 psi hot when you are driving

the oil gets thinner as it warms up so the pressure drops, but only at idle, the rse of the time it should be nice and consistant

tabetha

The oil gets thinner as it acts as a coolant, probably more so than the water in the cooling system, putting a oil cooler on it would increase pressure by keeping it cooler, but use a stated one as it must not be too cool or it loses it's effectiveness.
There is no set point with wear on an engine, it would no doubt be a bit tired, but the big question is when is a rebuild needed varies from person to person and use.
I have had mini's in the past where you had to gently over a 30 second period coax the engine into stop clanking and build oil pressure, too fast rpm and it got worse so had to find a happy medium, was on 0 oil pressure for 30 secs at a time, admittedly they needed rebuilds!!
tabetha

COLEYST200

iTrader: (3)

NO MATE IT DID NOT COME ON . and it dose work so never trust them

tabetha

The oil lights are set so ridiculously low, if you see it it is almost guaranteed to be goosed.
tabetha

SWIFTY

10-40 is too thin for a Cossie. Drive it nice and gentle until you put some thicker oil in it.[/QUOTE]




is 10w50 thick enough if not what should i go for.

SWIFTY

only went up to 120psi when i first started it then it droped again.

SWIFTY

i read today that it could be a sticking oil pressure valve in the oil pump.
does anyone now where about on the pump it is and how to take it apart.

thanks



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big mac

iTrader: (7)

its a sump off job fella you sure its not a faulty gauge i would have it checked firsts with a direct fit oil pressure tester is the gauge electric or mechanical??? i run 5/50 in my 4x4 after a good thrash it sits at 26psi and under driving conditions 50psi

tabetha

All the valve is is a spring pushing on a ball or valve seat, under a round indented cover of about 1/2" diametre, they are pressed in when made.
tabetha

SWIFTY

does that mean i carnt take it apart and clean it up???
i read that it could be sticking due to rubbish its sucked up and needs striping an cleaning.

LHD220Turbo

iTrader: (4)

you can take the pick up pipe off and give it a clean; but in my experience it never normally that that causes the problem

its a long old job as well; you have to drop the sump

first thing i would do is get a mechanic pressure gauge fitted, then go from there; do the cheap things first

if you engine is worn, try changing to a 60 weight oil and see if it improves

no point taking your motor apart unless you know for certain it needs a build

what mileage has the motor down?

SWIFTY

since its had a freshen up (new shells and gaskits) about 4mile the pump has done about 1000

LHD220Turbo

iTrader: (4)

ummm sounds ominous i'm afraid; new shells and new pump and low oil pressure already?

what did you do with the crank?

SWIFTY

had it checked by a engine place to make sure it was ok and the measured for my shells.

hope its a easy fix like faulty gage or sender.

SWIFTY

just spoke to my mate and he said if it was anything to do with the crank it wouldnt have oil pressure all the way across the rev range not just on idle is that true????

LHD220Turbo

iTrader: (4)

not always; look at coleyst200 above ; his car had oil pressure and look at his shells.

SWIFTY

coleyst200 WHAT CAUSED YOU LOW OIL PRESSURE ON IDLE???