One way valve

[Rikki Kitto]

Help please, saw a thread on here a while ago that had some advice about a little one way oil valve that stops oil from dropping back down into the sump when you switch engine off. Can't find it but need advice on how to fit it maybe a part number if poss, cheers, think it might have been Tonks not sure.

[Error404]

you mean the little check valve behind the oil pressure sender?
I think its 077 103 175 B

[Rikki Kitto]

Cheers how hard is it to fit?

[Jamo]

If that valve was faulty you'd have no oil pressure at all showing on the gauge

[UrS4boy]

AAN/ABY/ADY Oil Pressure Sender, Switches and Check Valves

Help please, saw a thread on here a while ago that had some advice about a little one way oil valve that stops oil from dropping back down into the sump when you switch engine off.

Not sure why you would need one. They rarely fail if the oil is keep clean. Anyway, here is a photo of what you are looking for and a link to AAN/ABY/ADU Oil Pressure Sender, Switches and Check Valve info:

http://forums.quattroworld.com/s4s6/msgs/96161.phtml

[driftin jo]

If that valve was faulty you'd have no oil pressure at all showing on the gauge

Why ? The check valve is there to stop oil draining back from the head so you get oil
pressure there quick, if it sticks open you will just take longer to get oil to the head on start up, you WILL still have oil pressure, just won't build up as quick as it should.

[Rikki Kitto]

Why ? The check valve is there to stop oil draining back from the head so you get oil
pressure there quick, if it sticks open you will just take longer to get oil to the head on start up, you WILL still have oil pressure, just won't build up as quick as it should.

No oil pressure on start up unless I give her a boot to 4,5000 revs which I hate doing but to wait for it to build can take up to 1 or 2 minutes not good either hopefully this will sort it out

[driftin jo]

No oil pressure on start up unless I give her a boot to 4,5000 revs which I hate doing but to wait for it to build can take up to 1 or 2 minutes not good either hopefully this will sort it out

I think that's more than than a check valve problem you have there, even without it it should make pressure in a few seconds.

[driftin jo]

Of course it could just be you have waxy gunk at the back of the sender so it does not see the pressure until the oil melts the waxy **** that forms when it cools.
How is it when its warm ? Have you removed the sender ? I think it is most likely that it is gunked up.

[Rikki Kitto]

Got a few issues defo, cold I have 5 bar then drops to 1 or just under on hot idle soon as I put my foot down I have 5 bar fluctuates from around 2 to 5 whilst driving, which is of course normal. Just the lazy start that's worrying me.

[Rikki Kitto]

Not just a sender issue you can hear the top end until you get pressure reading it sounds nasty.

[driftin jo]

Not just a sender issue you can hear the top end until you get pressure reading it sounds nasty.

not good, how long has this been going on ? how is your oil ?

[Rikki Kitto]

Just changed the oil but has been doing this a few months on and off

[UrS4boy]

Cheers how hard is it to fit?

You need an 8 mm triple square (aka "serrated") bit to remove and replace the oil pressure check valve.



Any chance you are running a "built" engine with ARP main bearing studs? I don't understand this but apparently it is possible to crush the oil check valve in the block when running these studs:

http://forums.quattroworld.com/s4s6/msgs/144645.phtml

[Rikki Kitto]

Engine is standard as far as I know