Mr.Alex

That is a different problem entirely. My oil cooler has a slow drip, but its not from the sensor or the lines. The entire bottom half of the oil cooler is just wet. So I assume it would stick debris a bit more in its current condition. However, I would think these temps are somewhat normal for a city driven, stoplight to stoplight car no?

I was watching some youtube vids today, and It seems most people have their gauge behave like mine; a little above zero on ignition only. But I always assumed I hit five bar until I saw what five bar looks like, it seems my gauge never shows above ~4.5. I'm still 50-50 on what to do, I want to get a manual gauge for peace of mind on it, but I have also never removed any part of the manifold, so it will def. be a learning day for me.

Mr.Alex

For those who have a similar issue, it was indeed the sender that was faulty. I was starting to suspect it more and more as it would slowly give me the oil pressure light when the temp gauge was not very high.


But this is also what my oil cooler looked like, replaced it along with a new resistor.

joshw

Hi everyone,
Rather than starting another post on oil pressure sender units, I thought I would just add to this one.

I've had my 964 for a little over a year and have noticed the oil pressure gauge bounce around a lot while driving (never noticed the oil light come on). It wasn't something I concerned myself with at first but lately, the car seems to be idling poorly when at a stop sign or red light so I began searching for answers. The car has never actually stalled. With regards to the oil pressure gauge, it seems to hold idle above 1 bar and will shoot up while under throttle, and drop when I engage the clutch to shift, and then jump back up under throttle. I don't know if this is normal behaviour or if the two issues are related but it seemed like a good place to start. Should I be looking to replace the sending unit to resolve this issue, and could it be related to the idling issue as well?

I also slightly overfilled the oil during my last oil change, would this impact the car's behaviour?

Thanks, everyone.

Rocket Rob

Your oil pressure should be 1 bar for every 1000 rpm of engine speed. The oil pressure will vary as your engine speed varies. If you hold the engine speed steady, does the oil pressure vary? If so, you may have a pressure sender problem.

joshw

Hi Rob,

Thanks for the reply, it appears perhaps my concern is more related to inexperience with these air-cooled cars. I would say my car maintains its oil pressure (1 bar for every 1000 RPM), it's only when I come off the accelerator that it drops. That said I have watched a few driving videos of other 964s and really focused on the oil pressure gauge and they don't seem to fluctuate while shifting gears?

Rocket Rob

If you are changing gears, you may or may not notice a change in oil pressure. There is a slight lag to the engine RPM.

joshw

Thanks for the advice and responses, but it appears it'll be a while before I'm able to take the car out for another test ride. We received our first major snowfall overnight and I'm now looking at a foot of snow and it's still coming down. April may be the soonest she comes out of the garage but I've got a few projects, replacing some worn outer mouldings, and a few other odds and ends.

See you in the spring.