Oil pressure?

alancordeiro at att.net alancordeiro at att.net
Tue Jan 22 14:47:59 PST 2008


It sounds like you had a bad oil pressure sender unit, which somehow 'fixed 
itself" and is now working normally. Earlier it may just have been stuck at 
5.0 bar all the time internally....if your oil level warning keeps going 
off, it could be one of the two pressure switches is bad. If the warning 
comes at idle, its the low pressure switch, if it only occurs when the 
engine is above 2000 rpm, its the high pressure switch.

The oil consumption is slightly higher what I run......not sure what 
"normal" really is.....keep looking for external oil leaks and fixing them 
if they seem excessive.

Good luck,


----- Original Message ----- 
From: "Matthew Barrett" <avenger0017 at gmail.com>
To: "Brandon Rogers" <brogers at terrix.com>
Cc: <200q20v at audifans.com>
Sent: Tuesday, January 22, 2008 5:30 PM
Subject: Re: Oil pressure?

> That is the same way my car behaves once it has been started, 5 bar at
> start, 5 bar when I'm on the gas and 2 bar at idle once its warmed up.
> Even after this weirdness the last few days. Just seems odd that all of
> a sudden its behavior changes, not to mention the oil warning keeps
> going off despite having a full oil level.
> I agree with Ed as well, I don't really think the needle's initial
> position means all that much. It's more that I'm curious why it would
> randomly change from showing 5 bar, to showing 1 bar and telling me the
> oil is low when, in reality, it has a full crankcase of oil.
> As for the the oil consumption, yes it is high. If you search the
> archives for posts from 'Derek Pulvino' you will see he has asked about
> this issue before. Turbo seals among other things were suggested,
> although I noticed a coating of oil on the back of the engine and the
> bottom part of the distributor which garnered a raised eyebrow from me.
> -Matt
> 1991 Pearl White 200q20v
> Brandon Rogers wrote:
>> I would think you are fine - if the engine isn't running the pump isn't
>> circulating the oil - and hence no real pressure.  As long as it jumps
>> to ~5Bar once it starts.  My 3B is at about 5Bar when I start it - stays
>> there with any revs greater than about 2000, and drops to about 2 Bar at
>> idle once warm.  I don't know why the gauge would jump to 5Bar with the
>> key just at "on" but not started - that seems weird to me...but then I
>> don't have a 200 - just have the motor...
>> But that oil consumption sure seems high to me....
>> If anybody disagrees jump right in!
>> Brandon
>> '84 urquattro w/ 3B
>> -----Original Message-----
>> From: 200q20v-bounces at audifans.com [mailto:200q20v-bounces at audifans.com]
>> On Behalf Of Matthew Barrett
>> Sent: Tuesday, January 22, 2008 1:40 PM
>> To: 200q20v at audifans.com
>> Subject: Oil pressure?
>> Before I present my problem to the list, I feel a quick introduction is
>> appropriate as this is my first post.
>> My name is Matthew Barret and I live in Tacoma, WA. I am 18 years of age
>> and currently taking classes at a local community college. I recently
>> purchased Derek Pulvino's 200q20v in November, and have inherited all of
>> the problems and "character" that the car has. (I'm sure Derek is glad
>> to have the A4 and less problems to deal with.) I am sure I will
>> resurrect some of the posts he has already made, (oil burning, rear
>> caliper rebuild, etc.) but for now I have a new problem that has come up
>> in the last few days.
>> For the last two months, when I have turned the key to the "on"
>> position, the oil pressure gauge would jump up to 5 bar, which as far as
>> my understanding takes me is normal. Yesterday, the oil check light came
>> on and being that I hadn't checked it for a week or two, (school and
>> work schedule sucks) I added about half a quart. (It burns a quart every
>> 500 miles) Now the oil pressure gauge barely moves when I turn the key
>> to the "on" position. As soon as I start her up, oil pressure jumps up
>> to 5 bar and it runs the same as it has since I bought it from Mr.
>> Pulvino.
>> Obviously, this problem worries me. Curious if anyone has any BTDT
>> experience.
>> TIA
>> -Matt
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