Another Oil Pressure Question

[BCMiller]

Hi all,

My S1 R33GTS-T may be having some oil pressure issues. On start up the gauge reads 6kg/cm2, and when the car warms up it generally reads about 4kg/cm2 at 3000rpm. This all seems reasonably healthy for 4100 turbolite oil AFAIK.

The problem is that sometimes (randomly) the gauge will start reading 2kg/cm2 at 3000rpm, and will drop to 0.5kg/cm2 at idle. Then later it will return to normal.The engine doesn't seem to get any noisier, and if the gauge wasn't there, I wouldn't know there was an issue.

The oil pressure light doesn't come on (although it does work on engine turn-over).

I have ordered a sandwich-plate and OP gauge from JustJap, to check the gauge and sender. I was hoping someone else may have better insight on what might be going on. Should I be preparing for a new oil-pump?

If so what's a new standard pump worth? :-)

TIA

PS- I searched, but no other threads were quite the same problem.

[Cubes]

If you find the stock guage is reading correctly then you won't be up for just an oil pump. Rebuild time.

[BCMiller]

If you find the stock guage is reading correctly then you won't be up for just an oil pump. Rebuild time.

Do you mean that the oil pressure problems is due to a stuffed engine... or that I've stuffed the engine by driving around with low pressure?

What do you think the problem might be?

[Boss-zilla]

From my experiance with a r32, r33 and r34 this is about normal.

The stock guages are not the best but as long as the light does not come on you should be fine (light uses a different sender)

[Green_s13]

my stock guage does this however my aftermarket reads steady so i would say it is the stock sender but for peice of mind i woul get it tested most mechanics should have the equipment to test this

[Duncan]

yeah faulty sender can look like this. but since motor will die if the guage is right, its worth taking to a mechanic to put another guage on to check

[BCMiller]

Thanks all.

Yeah, I've got it booked in. And AVIS now love me. JustJap gauge should arrive today so I'll try that out tonight.