Oil pressure relief.....exploded view

[Chuggaboom]

Hi All

Anyone got one ?

Or indeed is it part of the engine manual available on here somewhere ???

Reason I ask is last time out with the 4.2 in the racer at Llandow, had several low pressure warnings.

Have undone the big nut and removed it plus spring behind, but other than that, stuck as what is there does not want to come out !!!

G.

[scotty_d]

I would start by fitting a brand new spring, Mine was going a little low on the pressure side as well. Compared the old to new and it was a good 5mm shorter than the brand new spring.

New spring and my pressure has been strong for the last few years.

[Gray_101]

I once saw a TVR memo to the dealerships.... Saying if customers of early 4.2 cars complain of poor oil pressure while on track days. They should remove the 1/2 internal bore oil pipes and replace them with 5/8s as fitted as standard to the 4.5 s.

I've recently done this upgrade on mine.. I also put a bigger oil cooler in and changed the union connector on the bottom of the oil pump... It made a very noticeable difference in oil pressure at high revs.

Edited by Gray_101 on Monday 9th September 11:02

[Clarky9506]

Hi,

Where is the relief valve located? I think my oil pressure is a little low compared to the values some people get so should probably try changing the spring.

Not long had my cerbera so still trying to find my way round it. So far I've only managed to find the accelerator peddle and the fuel filler cap.

Matt

[C3BER]

Matt what engine do you have?

What are your pressures hot and cold and under load.

http://www.pistonheads.com/gassing/topic.asp?t=123...

Should help.


Welcome

Edited by C3BER on Monday 9th September 16:22

[C3BER]

Matt what engine do you have?

What are your pressures hot and cold and under load.

http://www.pistonheads.com/gassing/topic.asp?t=123...

Should help.


Welcome

Edited by C3BER on Monday 9th September 17:35

[Clarky9506]

Thanks Ive wanted one for years and finally took the plunge a couple of months ago.

It's the 4.2.

Cold it jumps up to just over 40 at idle. Doesn't move when it's under load. Once warmed up it still about 40 under load but drops into the 20s at idle. I guess the gauge could be at faulty as it doesn't seem to operate smoothly. It sort of jumps up and down as if the dial is sticking. I thought I'd try changing the spring to see if it would go any higher as its only a few quid.

[C3BER]

Does seem low and you should have variance between load and idle when hot.

New spring could be your answer.

[anonymous-user]

Clarky9506 said:

Hi,

Where is the relief valve located? I think my oil pressure is a little low compared to the values some people get so should probably try changing the spring.

Not long had my cerbera so still trying to find my way round it. So far I've only managed to find the accelerator peddle and the fuel filler cap.

Matt

[C3BER]

Is that the new engine moving device I see from ASDA?

[anonymous-user]

C3BER said:

Is that the new engine moving device I see from ASDA?

Well if you ain't got a pallet truck.....

[Tanguero]

djstevec said:

C3BER said:

Is that the new engine moving device I see from ASDA?

Well if you ain't got a pallet truck.....

Have you not got it back in yet Steve?

[anonymous-user]

Tanguero said:

djstevec said:

C3BER said:

Is that the new engine moving device I see from ASDA?

Well if you ain't got a pallet truck.....

Have you not got it back in yet Steve?

I wish...close to having the moolah for the respray and other bits, so engine still with APM. Need another knee op, hopefully before Xmas, so will see how that pans out.

[dswiscrazy]

locations of the OIL PRESSURE RELIEF SPRING on a ajp 4.2
os (driver side wheel )