high oil pressure showing on gauge?

[plastermaster]

Hi guys,finally got my mk2 storm running & mot'd.I bought it a couple of months ago as a non runner (blown head gasket & been stood many years).Anyway oil pressure goes off gauge (10 bar) when cold and even when warm shows about 6 bar on tickover.Could this be just oil pressure sender on the head or something more sinister? Any ideas welcome.

[ianaudia4]

Is this an aftermarket gauge as the MK2 Storm never came with one?

[plastermaster]

no, previous owner had it fitted from new by vw dealers.

[bensspares]

lol, someone who is worried that their oil pressure is too high, as long as the light stays off and the buzzer is quite i would be well chuffed that my engine is so well loobed.

to be negative, pressure releif valve on oil pump or incorrect grade of oil (too thick)....unless oil is pumping out of the rocker cover or the oil filter gasket id be well chuffed lmfao.

[PeteGLi]

.......to be negative, pressure releif valve on oil pump ..........

Pressure should never be that high. I don't think it is supposed to go above 5 or 6 bar max at cold.
The 'check' pressure is a minimum of 2 bar at 80 degrees c.
Should normally be about 4 bar max at temp.

I had similar high pressure a few years ago on my 1.6 GLi - which did blow oil out the rocker cover.

I changed the oil pump - the pressure relief valve on the old pump had seized and it took a great deal of force by hand to eventually get it to move.

You may find that when you fit a new pump, your gauge will not read quite accurately as the sender may have been damaged by the high pressure. My gauge needle no longer sits on zero with the iginition on and the engine not running.

[go-for-it1]

I'm with Pete on the oil pressure relief valve being stuck shut, very likely after standing for a long time. Change it, it's there for a reason.

[bensspares]

just incase iv been miss understood.....its more than likley the pressure releif valve on the oil pump.........i am celebrating my freedom from an ex who has been bleeding me dry for 19 years....my income is mine way hay......

[plastermaster]

Thanks for the replies guys, wasn't certain there was pressure relief valve on the pump but now i know there is it looks like the sump is coming off this weekend. Can the valve be freed off as car has only done 35,000 miles?

[bensspares]

buy a new pump.that way if you fail to sort the releif valve you wont have to remove the sump again and when you have removed and refitted the 3 bolts round the gearbox housing you will be reluctant to have to do them again.if you fit a new pump you shouldnt have any issues for many 000's of miles.

ben

[ianaudia4]

A new pump from GSF is about £38, less if you are a paid up member of the register.

[plastermaster]

Ok new pump it is then.
Thanks fellas will let you know how i get on.

[Nate]

have you dione an oil and filter change? have you fitted a genuine vag filter? certain cheap brands are prone to causing this problem

[plastermaster]

Right guys,new oil pump fitted this weekend and oil pressure is still off gauge (10 bar).
New genuine filter and 10w/40 oil only 15 miles ago.
Could it be oil pressure sender or even gauge? Gauge zero's ok when switched off.

[bensspares]

is there mayo in r/cover etc,no oil leaks.......do you have aa or rac recovery etc.........i wouldnt worry about it myself,high oil pressure is good....you do have the correct grade of oil fitted ?????

[plastermaster]

Hi Ben, r/cover clean as a whistle and no oil leaks at all. Just joined AA so should be ok if disaster strikes,am going to try and get a manual pressure gauge to test pressure at cylinder head sender point,this should tell me if its something inside engine block.
Cheers Steve.