Toddster

Can some one give me a 101 on the oil pressure gauge in these air cooled 911s.
Where should the needle reside when cold, hot, where on the indicator should i be concerned? To be honest i always focused on the oil temp and never really understood the gauge well enough to use it as a tool to read how my car is performing.

Ivan J

My pressure gauge is pegged at 5 bars for practically anything except for idling.

At idle, it shows about 3 bars, give or take a little depending on temperature.

I suspect that if anything catastrophic happens that causes a significant loss of pressure, the damage will probably already be done before you notice the gauge.

Toddster

That is exactly how mine behaves
I did not see any movement from when i started it today and after 45 minutes of driving
I would have thought as the engine oil heats up the pressure would drop

gavonder

Cold, it should be at 5 bar. Warmed up at idle, it should be between 2 & 3. Then while driving, any thing over 2000rpm, it should back around 5.

Gbos1

+1

pp000830

At idle:

• Cold 5 bar
• Warm 2-3 bar, this is when you can measure your oil level with the dip stick.
• Very hot, after say an auto cross run in hot weather just at 2 or slightly below.

The gauge is an indicator of both oil pressure and working temperature / viscosity of the oil.

It works a lot like the oil level gauge that indicates oil level when hot and relative temperature/viscosity of oil.