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HR Low oil pressure? The answer


san marino blue

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Hello,

I am new to the 350z, but thought I'd share my experience of my low oil pressure HR engine.

 

I bought the car an 07 roadster with 82k on the clock in San Marino blue

The car was in above average condition for the mileage, but the oil pressure was reading low.

I was assured by a few threads on forums including this one that the gauge was probably wrong, or an oil change would sort it out.

It sounded great no rumbles, knocks, or squeals and no smoke.

It went well too, in fact had it not been for the gauge, you'd swear it was fine.

My gut feeling was to leave it there

So

I kicked the tyres, said I hated the colour, which I love, sucked air through my teeth and got the dealer to drop it 500quid, sold as seen

A bargain at 6500 for an 07 313 roadster, which just needs an oil change...

WRONG!

 

On the way home CEL came on, but still running well so what the hell, ECU missed a reading, so what?

Under tray came loose so had to tied up with fence wire

But we got home

 

Oil pressure readings were

15psi cold on tick over, 80psi revved

3psi hot tick over, 50psi revved

The next few weeks I changed the oil and flushed it out with Wynnes engine cleaner

No better

Checked the cars gauge using a mechanical one

It was reading right

CEL was P0014, P0024, exhaust VVT, but could also be P0011, P0021inlet VVT

Caused by the low oil pressure

I dropped the sump to see if there was a blockage in the pick up

This was clean, but I found a small piece of paper gasket

I now spent a month on research and found this article

It's quite long but worth the read

http://g35driver.com/forums/g35-sedan-v36-2007-08/436179-cause-dreaded-p0011-p0021-codes-everyone-curious-about.html

If this sounds like your Zed, then this thread explains it all, part nos the lot

If your Zed suddenly lost oil pressure, it can

The new gasket is reinforced so hopefully that's the last time I have to do it

 

Check the gauge and change the oil and filter first

However if you've changed from 6th to 1st at 120mph, your Zed is smoking, rattling, you ran it out of oil or making unnatural noises, I am sorry, it's probably way more serious

 

This is a big job all the ancillaries the rad and the timing cover must come off, but it's an engine in job and I did it on the drive in Dec!!

It's not a hard job, but two days work if you've not done it before

The bits cost bugger all, about 100quid with oil and filter

My crank bolt was a nightmare

 

I now have 28psi hot tick over 100 revved

110psi cold tick over, don't rev it cold

 

No CEL, but this took 100miles of hard driving before it cleared

 

I now love my Zed, it was eventually a bargain and

 

I hope this helps someone else

Don't ignore it these things make big oil pressure for a reason

 

Thrown rods aren't repairable!

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I agree,

Nissan denying there is a problem when clearly there is, seems to be their attitude to most things.

It took me ages to find this, as it's not something you'd normally expect to look for.

God only knows what a main dealer would charge for the job

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