200tdi oil pressure high?

flat · Nov 17, 2015

Guys

I fitted one of these (cheap) electronic oil pressure gauges and matched sender
http://m.ebay.co.uk/orderDetails?itemId=290947927681&txnId=1233551851019

Via a T piece on the end of a 500mm length of braided steel pipe.

On tickover the oil pressure says 40psi and when driving around 80psi.

Now, the gauge doesn't sit on 'zero' when off but a bit above.

So my question to you is are those figures high? Or is it a naff gauge over reading? Or is the prv in the oil pump lazy?

My money is on naff gauge but thought I would ask. Anyone know how to zero an electronic gauge?

Or shall I ignore the figures and just use it as an early indicator of oil pressure failure?

I use 15w40 oil and the engine pulls strongly, runs clean and has zero oil leaks (recent rebuild).

Cheers

Ed

Kwakerman · Nov 17, 2015

If its reading about 18psi without the engine running you can probably subtract 18 from all readings which would make it read in the right region. Alternatively if it is new send it back for a replacement.

wammers · Nov 17, 2015

Should be around 25 PSI at idle and 55 PSI at 3000 RPM.

flat · Nov 17, 2015

Cheers guys.

I reckon gauge is duff - have emailed the seller. Will take the sender off and make sure it's clean with a good earth to.

Presumably if the oil pressure was actually that high it would be weeping out of gaskets etc?

lynall · Nov 17, 2015

Was the gauge at zero before you fitted it?

flat · Nov 17, 2015

lynall said:
Was the gauge at zero before you fitted it?

To be honest I can't remember, I would like to think it was and that I would have noticed if not.

Tomorrow I will make doubly sure all the terminals are clean and that the sender is earthed properly just in case it's some weird current feedback or something.

jamesmartin · Nov 17, 2015

flat said:
Cheers guys.

I reckon gauge is duff - have emailed the seller. Will take the sender off and make sure it's clean with a good earth to.

Presumably if the oil pressure was actually that high it would be weeping out of gaskets etc?

no it wouldnt ,but yours isnt

flat · Nov 18, 2015

jamesmartin said:
no it wouldnt ,but yours isnt

Is there like a maximum pressure?

flat · Nov 18, 2015

The engine can tolerate I mean

flat · Nov 18, 2015

okay 'zero'd' the gauge by dismantling it and setting the pointer on '0'

now follows what i would expect the gauge to say.

200tdi oil pressure high?

flat

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