The last three FC's I've had had dead oil pressure gauges, one of which worked fine and just stopped after a while, is it the gauge cluster itself or a sensor or some sort? Is this a common issue?

 

it's the temperature sendor. This was discussed last week, so do a search for "gauge" or "temperature" and you should see it

 

I would if the search worked.

 

DOH!!!!

I'm not sure what page it's on right now.

 

I have seen It many times to be the Oil Sender Unit but Icemark suggests It to be the Thermo Valve within the Oil Cooler. Take you pic.

 

No, the only time it is thermo valve is when there is low pressure, rather than no pressure.

No pressure I would be saying bad sender.

Low pressure, I would be saying E-shaft thermo valve

Normal or a little low pressure, dropping with RPM, I would say leaking front o-ring

 

Just a gauge that shows nothing, and points below 0, still sender?

 

Mine does this too (but my car has a blown motor), not sure if its just not building oil pressure because of that or what. Another thing to tackle when the new motor gets here.

 

After confirming a clean connection at the Sender Unit, yea likely It. Unless the contacts at the back of the Cluster need attention.

 

Just turn on the igntion. Put a friend in the drivers seat. Then ground the connector that runs to the pressure sending unit. Ground breifly. your friends should notice the gauge peg. If it pegs your cluster.....is not....clustered

It would probally be the sending unit.

James

 

JUMPING IN Talking of oil-pressure senders, what size thread do they have, i have an s4 n/a and cant seem to find anything to guide in the right direction.

 

Do you mean you are having a hard time getting the pressure sensor back in the block?

James

 

No what i mean (excuse my english) is what size thread is it B/C ive bought an aftermarket gauge that have 1/8 inch thread, and i cant search the forum for info on wheter ill need an adapter...Kim

 

What if the oil pressure gauge goes all the way to the top at idle? Bad gauge? Bad sending unit?

 

Well, if your gauge pegs it would lead me to believe your sensor wire is grounding out somewhere. That sounds like fun. If you cant find the short might just need to run a new wire.

James

 

Thanks. I'll look for a bad wire coming from the sender. Maybe the sender wire is messed up.

 

ANYBODY!!! What is the thread-size for the OPG sender. PLEASE

 

BUMP