starlet oil pressure,what should it be ?

[craigyboi]

Took the sump off and got the oil pressure relief valve off so going to take it to Toyota and get a new one so here's hoping this is the problem

[Ollieh17]

I'd be dropping the main and rod caps and checking the bearings

[patman]

Definitely what Ollie said, that's your first call 👍🏻

[craigyboi]

Does anyone know what the bolts on the bottom of the rods need tightened too. I've been told I'll need a torque wrench

[patman]

main bearings: 29nm then 58nm

big end bearings: 20nm then 40 nm

But please could someone else confirm this too 👍🏻

[Ollieh17]

If it's forged it will probably have are bolts so will be a different Torque

Edited August 5, 2017 by Ollieh17

[craigyboi]

Changed the pressure relief valve and that's made a huge difference. Now on start up I'm getting 4 bar but after 15 minutes it's dropping to 7psi at 800rpm. But 3000rpm I'm getting 42 psi . Is this good ? I'm thinking it could be better ?

[clubman s]

mines read as foll

20psi at 950rpm on a hot engine

over 2000- 2500rpm it goes up to 60-65psi

using semi sinth oil 10w40Motul

Edited August 12, 2017 by clubman s

[K2NXY]

whip your sump off, and take the oil pressure relief valve off.. strip it and clean it. I have even put a 1mm washer in to umph the pressure a little. I take mine on track and suffer from low oil pressure on idle when really warm. They can get clogged up after a period of time and become sticky. For anyone that has the same issue and thinks the worst give this a go first 👍

[patman]

Changed the pressure relief valve and that's made a huge difference. Now on start up I'm getting 4 bar but after 15 minutes it's dropping to 7psi at 800rpm. But 3000rpm I'm getting 42 psi . Is this good ? I'm thinking it could be better ?

You should of checked the bearings too while the sump was off 👍🏻

[craigyboi]

It's not the bearings

[patman]

Have a good read through this:

http://www.aa1car.com/library/us1097.htm

[Ollieh17]

Not the bearings...havent even looked at them. Wether they are the cause or not, Any period of low oil pressure has the chance to damage the bearings

[AdamB]

Does the oil pressure light come on when at hot idle?

Dismissing the bearings is ludacrous without checking them.

Forged engines are far from indestructable.

[craigyboi]

Yeah checked while I had it all off. The car is off the road I'm not driving it until I fix the problem. had Lots of people telling me about this 1mm washer. It's on 5-40 fully. would a 10-40 semi be better ?

[craigyboi]

No the light stays off. It was coming on before though

[Ollieh17]

5/40 or 10/40 would be no different. You could try a 50. The thing is there is something causing the low oil pressure. And spacing the valve is just masking the issue as is thicker oil really. Oil pressure is greatly affected by the clearance on bearings, cams etc

[K2NXY]

I run 5w 50 now and havent had a problem, prior i was running 10w 60 but that is just too thick for those engines 👍

[craigyboi]

I think I may have found the problem just drained the oil and took the sump off and it was staring me in the face I went a bit crazy with the gasket sealer so it's spewed into the sump and the pick up has sucked it all up so I've cleaned it all off and put it back together not going mental with the gasket sealer. So fingers crossed for tomorrow.

[craigyboi]

So never worked. Put it up for sale now. How much ball park for a bottom end rebuild