RS2 - High oil pressure?

[afen]

I'm having an issue with my oil pressure gauge. At idle it's okay, stays right at 2 bar, but when I give the car some throttle the needle goes up quickly, before maxing the gauge at around 3000rpm. If I keep the throttle at around 2000rpm the needle in the gauge vibrates up and down around 5 bar.

Could it be the sender that's on it's way out? The engine is newly rebuilt, so there should'nt be any issues there, but the oil pressure sender is used.

[UrS4boy]

I'm having an issue with my oil pressure gauge. At idle it's okay, stays right at 2 bar, but when I give the car some throttle the needle goes up quickly, before maxing the gauge at around 3000rpm. If I keep the throttle at around 2000rpm the needle in the gauge vibrates up and down around 5 bar. .

5 Bar off idle at 2000 RPM sounds good to me. Since the oil pressure gauge sender is based on a rheostat inside the sender can, I suspect that the vibration is more likely be sourced at the oil pump. Sorry.

REFERENCE:

1. Oil pressure sender and switches:http://forums.quattroworld.com/s4s6/msgs/96161.phtml
2.Oil pump info: http://forums.quattroworld.com/s4s6/msgs/93029.phtml

[afen]

5 Bar off idle at 2000 RPM sounds good to me. Since the oil pressure gauge sender is based on a rheostat inside the sender can, I suspect that the vibration is more likely be sourced at the oil pump. Sorry.

REFERENCE:

1. Oil pressure sender and switches:http://forums.quattroworld.com/s4s6/msgs/96161.phtml
2.Oil pump info: http://forums.quattroworld.com/s4s6/msgs/93029.phtml

Could it be something wrong with the pressure release piston or spring? The oil pump was disassembled and cleaned when I rebuilt the engine, and everything looked alright.

[UrS4boy]

Could it be something wrong with the pressure release piston or spring?

Certainly a possibility. Did you get the piston installed correctly? There is only one correct way.

[afen]

Found the fault! The crimp connector on the oil pressure sender wire packed it in after 20 years. Crimped on a new one, and now the pressures are A-OK! Took the car for a spin, I now got around 2 bar at idle, 3,5 bar at 1500 rpm and 5 bar right above 2000 rpm.

If someone else is going to fiddle with their oil pressure sender, remove the dipstick tube and top radiator hose for easier access.

[UrS4boy]

Found the fault! The crimp connector on the oil pressure sender wire packed it in after 20 years. Crimped on a new one, and now the pressures are A-OK!.

There you go!! The best solutions are the simplest.

[steve briance]

Nice when it works out to be something simple!

I'm inspired to go check my oil temperature gauge as that flaps about between 90/100 and zero when it gets hot. The wire virtally dangling in free air that connects to the oil temp sender always struck me as being a bit vulnerable...