Normal oil pressures.

**UrS4boy** · 27 October 2011, 13:30

Oil Pressures

Originally posted by QuattroFever

Couldn't find anything definitive in a search.
What should warm oil pressures be on a healthy s2?

Should be 2 Bar at idle, but still close to 5 Bar while under way. Cold start should be close to 5 Bar.

**johne** · 27 October 2011, 14:10

Depends a lot on your oil.

If you're on a "thin" oil like 0-40 then hot idle after a thrash can get down close to 1 bar.

John

**FabS6** · 27 October 2011, 14:50

This might help you mate...

http://www.youtube.com/watch?v=pUADzKo_Z4c

150K miles, 10W-40 Greenstar oil, AAN engine 100% stock, warm oil temperature.

**QuattroFever** · 27 October 2011, 15:50

Hot idle 1.5 and 2000rpm 4.1bar

Cold idle 4.8bar

All read from stock gauge so not sure how accurate that is.

**UrS4boy** · 27 October 2011, 16:08

Oil pressure switch and sender info

Originally posted by johne

Depends a lot on your oil. If you're on a "thin" oil like 0-40 then hot idle after a thrash can get down close to 1 bar. John

Hmm....Aren't the oil pressure switches likely to trigger a low pressure warning at that low level? (The switches are 1.8 Bar for the UrS4 AAN, ABY and ADU, and 1.4 Bar for the UrS6 AAN):

quattroworld.com Forums: 20VT Oil Pressure Sender, Switches, Wiring and Check Valves (with UPDATES)

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

The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums

**prj** · 27 October 2011, 16:19

Uh, no, it DEFINITELY does not trigger anything until you get well below 1 bar. BTDT.

1.5 bar sounds fine to me if it is on normal and not stupid thick oil.

**mcandmar** · 27 October 2011, 16:23

2nd that, gauge sensor went faulty on my CQ and the low pressure alarm kicked in just below 1bar. I wonder if the 1.8bar and 1.4 bar are absolute pressures, as in .8 and .4 bar positive pressure.

**johne** · 27 October 2011, 16:35

Originally posted by UrS4boy

Hmm....Aren't the oil pressure switches likely to trigger a low pressure warning at that low level? (The switches are 1.8 Bar for the UrS4 AAN, ABY and ADU, and 1.4 Bar for the UrS6 AAN):

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

Don't forget the 1.8 bar sensor (switch) is only "read" at and above 2000 rpm by the dashboard alarm

John

**QuattroFever** · 29 October 2011, 11:14

Rattle turned out to be pas pump.

and

Only 10k miles on it. Genuine oem part before vag parts went down. Around £600 iirc.

Oh well...

**johne** · 29 October 2011, 17:09

PAS pumps do rattle, mine's got 150,000 miles of rattling on it

John

Normal oil pressures.

Normal oil pressures.

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