cayman evo

Need a little help please, would all evo 9 owners with oil pressure guage installed on cars with no mods that would change oil psessure please let me know what their pressure is at idle after car has been driven for at least 20 min. Trying to determine if i have a problem as mine is between 8-10 psi ideling at 850-900 rpm. Workshop manual says 29 kilo pascals ( 4.2 psi ) or higher is standard value, seems a little low to me. What does everyone think about this ?.

EiEVO

iTrader: (9)

what you have read from the manual is correct. as for my VIII i idle when warm at roughly 18-20 psi... When cold it idles at 50 psi.

f-dub

iTrader: (5)

My car idles at 90 psi when I first start it and goes down in about 5 psi increments as it warms up. Finally it will settle at 15-20 psi when warm.

EVO<VR4

iTrader: (2)

Stop driving the car NOW!!! Oil pressure that low will cause detrimental damage to your bearings and crank.
Change your oil and send a sample to http://www.blackstone-labs.com/ What weight oil are you using? Switch to a thicker oil 15w50 mobil 1. Report back.

cayman evo

Do i have anything to worry about, should jap model be any different from US model in terms of oil pressure, temp here is about the same as florida. EVO owners in the UK say they are getting 29 psi at idle can it vary so much from car to car ?.

cayman evo

This pressure is only at idle, car has 60 psi at 2300 rpm and under boost over 90 psi.

cayman evo

Is this reading taken with car just idleing from a cold start up or is it taken after car has been driven under boost for 20 min or more.

lbcevo

iTrader: (12)

Dude, relax and re-read his post. He said 10 psi at idle when warm. That's totally normal. Do a search, report back.

f-dub

iTrader: (5)

After being driven or after being idled for a long time. It takes forever for the car to get to operating temperature when it is just idling, but it will eventually. Where did you tap your oil pressure sending unit at?

cayman evo

Oil pressure taken from bung just above oil filter.

Skiploder

Same readings - tapped at the head so I kind of expected it to be a bit lower than down by the filter..

Neighbor has a IX with light mods - he's pulling between 6 and 10 at idle with the car warm...........

3SgteGuru

iTrader: (3)

Ok here is a Brain Teaser, do you have an aftermarket oil filter, or is it OEM?

Try putting an OEM oil filter on see if that makes a difference, 3000GTs had this low or high oil pressure alot from the wrong filter be on, believe it or not.

cayman evo

Car came with MD356000 at first oil change could only get MZ690116 at second oil change got another number but they are all oem filters.

cayman evo

Below is reply from dealer in Japan.
----- Original Message -----
From: "Toshiaki Endo" <endo@plaza-auto.com>
To: "David Khouri" <cserrant@candw.ky>
Sent: Wednesday, May 17, 2006 1:36 AM
Subject: Oil press.


> Dear Mr. Khuori,
>
> Still I can not hear about this problem from our Mitsubishi car dealer
> engineer yet. But answer from other racing mechanics are as follows.
>
> 1. Test and Service (Mitsubishi endurance race car maintenance work-shop)
> says, 4 lbs (1.8kgs/cm3) at idling is enough high. Usually oil
> pressure is
> less than 1.5kgs/cm3 (about 3.3 lbs.) If accellate around 4000 to
> 5000rpm,
> oil pressure will go up to 8 to 9kgs/cm3.
> Your car oil pressure sensor will be too sensitive. So, recomend you
> to
> use Evo. 8 MR sensor. This MR sensor lighting on warning little
> higher
> pressure than Evo.9
>
> 2. Our engine builder named G/Force, they said that idling oil pressure
> is
> between 1 to 1.5kgs/cm3. So, your pressure is normal.
> Evolution 8 or 8MR oil pressure is usually 7 to 8kg at 4000 to
> 5000rpm.
> but Evo. 9 is about 8 to 9kgs/cm3. The reason is MIVEC system.
>
> 3. Mitsubishi car dealer answer will advise you later.
>
> Regards Endo
>
>

barneyb

A few years ago the DSM fad was light oil for more horsepower. So, people were running 0W-30 or 5W-30 synthetic. I had one guy write me saying he had zero oil pressure at idle with this oil so he considered this normal. Hey, if it is synthetic oil you don't need oil pressure - right? Many of those cars survived a long time on this oil diet. So, I'm guessing 4.2 psi at idle will do okay.