GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: thebassman on 01 October 2014, 13:27
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HI
I noticed a few days ago my oil light started flashing, on my GTI mk3 8 V, ADY engine code.
It seemed to be coming from the oil pressure switch high up on the engine block. It's the brown one.
I bought a replacement from GSF, fitted last night, topped up oil, still got the flashing light.
The switch I bought from GSF says it is 0.1-0.35 bar, the VW one I took off was marked 0.1-0.45 bar.
http://www.gsfcarparts.com/931vg0030 (http://www.gsfcarparts.com/931vg0030)
Could this be my problem, or should I be looking for something else.
It may just be a coincidence the switch was leaking and the light started flashing, I'm a bit lost as to where to start.
cheers
thebassman
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your engine has two switches for oil pressure
when does the light come on? does it beep as well?
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It comes on pretty much straight away and stays on. No buzzing or beeping though.
Cheers
Thebassman
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that's the low pressure switch then.... as you replaced it faulty wiring maybe?
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Are you losing oil?
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It definitely was leaking oil from the switch, i have now replaced. I will keep an eye on it.
Cheers
Thebassman
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is your iriginal switch brown? if so the replacement gsf ones will not work...vw dealer will not have them either....scrapyard or specialty parts store only hope for a like to like
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is your iriginal switch brown? if so the replacement gsf ones will not work...vw dealer will not have them either....scrapyard or specialty parts store only hope for a like to like
Hi
yes, the original leaking switch was a brown one.
Any idea why the new GSF or ECP switch will not work? Is it the wrong pressure rating or is the normally open/ closed function incorrect?
cheers
thebassman
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You have two oil switches, one is for low pressure one for high.
Depending on which engine you have one of them is NC the other is NO. Do you have the part number of the one you put in now?
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You have two oil switches, one is for low pressure one for high.
Depending on which engine you have one of them is NC the other is NO. Do you have the part number of the one you put in now?
Hi
Yeah, it's the low pressure switch, high up on the engine block.
VW part number: 056919081C.
The vw one is stamped 0.1-0.45bar, the GSF switch is stamped: 0.1-0.35bar.
I went on the GSF website, entered my registration, and this was the one it recommended. I did also give them a call to verify before I ordered it.
cheers
thebassman
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just to be sure, the replacement one is 056919081C?
ETKA lists 028919081D for the ADY
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no one makes a switch like that now, even vw...only hope.to go.to.scrap yard and try to find one...i got lucky and found one...but only one..otherwise oil light will flash and mot man will note it....or not as i told one tester about it and he ignored it after seeing what good shape the car is in..
.. just think if vw cars all lasted 25 years...company would go bankrupt....sad but.true
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Sure you can buy the senders.... and they are still being made (VW never made them themselves).
They are fairly simple, even if not you could easily use one from another car using an adapter. Just takes a bit of research, though you can still buy all the ones used on mk3s....
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Any idea why the ones from GSF don't work? I wonder if they realise.
Cheers
Thebassman
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Do you own a multimeter?
The low pressure switch on ADY should be NC (i.e. with engine NOT running should have continuity with GND).
High pressure switch is NO, so should be open loop with engine NOT running.
Vice versa with engine running and oil pressure being OK (the high pressure switch may only trigger at higher rpm when oil pressure is higher than in idle).
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Do you own a multimeter?
The low pressure switch on ADY should be NC (i.e. with engine NOT running should have continuity with GND).
High pressure switch is NO, so should be open loop with engine NOT running.
Vice versa with engine running and oil pressure being OK (the high pressure switch may only trigger at higher rpm when oil pressure is higher than in idle).
Sorry, i have been a complete dic*head.
I have been out today with a multimeter and checked the continuity of the pressure switches, with engine off and then running.
All seemed ok.
I noticed, however, that the coolant expansion tank level looked very low, so i topped it up.
When i re-started the car, i noticed the light that had been flashing was the coolant level light, not the oil can.
So oil pressure is ok, with no leaky oil pressure switch. :whistle:
Just need to keep an eye on why i had lost most of my coolant.
cheers for the help guys.
thebassman
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Haha, happens to us all :D