pressure drop

[s4sT04z]

my se have problem ...please help me
the engine was cold ,pressure of engine oil .. ok
When the thermo working at 90 c the pressure was drop to the red point.
somebody know how can i do.
thank you so much
keng Thailand

[jk1]

s4sT04z said:

my se have problem ...please help me the engine was cold ,pressure of engine oil .. ok When the thermo working at 90 c the pressure was drop to the red point. somebody know how can i do. thank you so much keng Thailand

Keng,

How long have you had the car and how long has it been doing this?

You said the pressure dropped to the red point. At idle or what rpm? What is the pressure when you rev to about 3500 rpms?

The stock gauges are known to be unreliable in a lot of cases and read low at idle which is normal.

If it's in the red when you are revving the motor then you need to confirm if it's the gauge or the pressure is really low. If it is actually low then it could be a number of things.

I think we need some more info at this point.

Cheers,
Jim

[s4sT04z]

I'm so sorry for my english language.
This car I bougth in 1992 , used 16000 km..
ok now.
when the temperature is 90 c
rev at 1000 the pressure dropped close to red point.
rev at 3500 the pressure up to almost 1/3.]
I check gauge compare which analog gauge or another gauge (hks or defi) ,result is same .
check engine oil pump it's don't have any problem

i want to know oil pump it's must have mark? when to assemble
if you need any imformation plese tell me. i will check it..
on tomorrow
thank you
keng

[jk1]

What brand and weight of oil are you running?

Is this a new problem or has it been this way for a while?

I don't have the stock gauges anymore so how about it guys, how do those readings compare with yours?

If I'm not mistaken it's supposed to be ok if the needle approaches the red zone at idle correct? (5 psi.min)

Jim

[JeffYoung]

93.5 SE here.

I agree with jk. In the summertime, ty car starts out just over the half-way line of the oil pressure gauge. When warm, at 3k RPM it is just below the halfway line. At idle, it drops to near the red, but stays above it.

In the winter, or if the oil stays below 70 cel., my pressure at idle is near the last line.

All of this is based on my research normal. The 912 lives just fine with 5-7 lbs at idle.

[s4sT04z]

engine oil is mobil 1 .in Thailand Mobil have risk.. copy( not real)
now i use HKS (top)
i will try to chang to mobil 1 angin.

Now I change many thing but this broblem it's happen before.
exe.
Turbo : HKS T04Z
: Power FC
: water intercooler(bigger...)
: 800cc
: new throtle
: boost 1 bar (low)
1.8 bar (high) (100 octain)
400 hp on dyno at 1.5 bar(95 octain)
I recheck my engine again to night
Do you need some imformation ple tell me..

[JeffYoung]

Just looked back at the manual. Acceptable pressure levels are .3 bar at idel (or IN the red according to my rough estimation of where .3 bar is on the gauge), 2.4 bar at 3500 rpm and 3.5 bar at 6500 rpm. Mine does a littel better than that.

So, given this, I think your pressure is fine. Note also that the guage is notoriously inaccurate.

[s4sT04z]

thank you everybody so much
I will check pressure again..
thank you .

[GoldenGT3]

JeffYoung said:

Just looked back at the manual. Acceptable pressure levels are .3 bar at idel (or IN the red according to my rough estimation of where .3 bar is on the gauge), 2.4 bar at 3500 rpm and 3.5 bar at 6500 rpm. Mine does a littel better than that. So, given this, I think your pressure is fine. Note also that the guage is notoriously inaccurate.

Chaps i have the same simptons with my GT3 i tend to agree that its more likely to be the guage make sure you are using Castrol 10w 60

[red_devil]

Hi Keng,
Believe me, bring your SE and your stock ECU to Sert's garage. You will get your real british horses back at minimum cost.
Cheers

[s4sT04z]

I try to bring my se to Sert but otto shop didn't send my car. I pay a lot then I need guarantee from otto shop that important..

[red_devil]

I'm not sure he is the same Otto I knew. Where is his garage? Otto that I knew used to have garage at Sukapibhal 1. He plays a lot of gambling golf. And had caddy wife. If he is the sameone, I may be able to help you.

[s4sT04z]

otto shop at ladproud 15 open at 6 p.m-3a.m
the onwer is Teai.he make drag car
i think on wenday i will use slide car bring to sert.
thank you so much