Ian S

"Jim Elbrecht" <elbrecht@email.com> wrote in message
news:gad4f1567gtoi5l7fir3p01045lunesue3@4ax.com...
> First off-- Thanks to Tony, Ronny, Pete, Mike & Daytripper for your
> thoughts and comments.
>
> My mechanic has had a bad couple weeks-- and I made the mistake of
> saying-- "We're in no rush." Well, I wasn't-- but I forgot this my
> son's toy & I was just dropping it off while he was working to pay for
> it.<g>
>
> Changed oil, filter & sensor. It delayed the light for a bit the
> first day, but then it responded just as before. [light on when engine
> reaches temp-- then on and off randomly, no change regardless of
> rpms.]
>
> So last night he put his digital oil pressure guage on it [in the same
> hole where the sensor was] and told us to take it for a ride.
>
> While sitting at the garage, cold idle was 30+ psi, pressure at
> 2000rpm was about 40.
>
> Once warm, the pressure at idle drops to 6psi, sitting at 2000rpm it
> hovers in the low 20s.
>
> Out on the highway, holding steady at 2000rpm the pressure went from
> 20-27 for the first 5-6 miles, then evened off a bit to 22-25. It
> stayed there for 20 minutes or so-- and went back to 6psi at idle on
> the offramp.
>
> My mechanic [not an Audi man, but a guy I've trusted for 20 years with
> my cars] can't find anything but the 29psi at 2000rpm for oil
> pressure specs.

Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at 2000
RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.

Jim Elbrecht

"Ian S" <iws51remove@***.net> wrote:

-snip-
>Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at 2000
>RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.

Thanks Ian. I wonder why they ignore idle pressure on this engine?

And I guess my question for the dealer who will be topping off the
transmission fluid next week will be "Is 25psi cause for concern?"

Jim

Jim Elbrecht

"Ian S" <iws51remove@***.net> wrote:

-snip-
>Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at 2000
>RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.

Thanks Ian. I wonder why they ignore idle pressure on this engine?

And I guess my question for the dealer who will be topping off the
transmission fluid next week will be "Is 25psi cause for concern?"

Jim

Jim Elbrecht

"Ian S" <iws51remove@***.net> wrote:

-snip-
>Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at 2000
>RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.

Thanks Ian. I wonder why they ignore idle pressure on this engine?

And I guess my question for the dealer who will be topping off the
transmission fluid next week will be "Is 25psi cause for concern?"

Jim

Ian S

"Jim Elbrecht" <elbrecht@email.com> wrote in message
news:4o9hf1penmsclsc51554dfrj2imdimen9o@4ax.com...
> "Ian S" <iws51remove@***.net> wrote:
>
> -snip-
> >Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at
2000
> >RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.
>
> Thanks Ian. I wonder why they ignore idle pressure on this engine?

Not sure but they give idle specs in the Bentley manual for the 1.8 turbo
four of 14.5 to 50.75 for types AEB and ATW and 19 psi for type AWM. This
may be because of the turbo. Haynes lists an idle pressure for the older
SOHC V6 of between 15 and 36 psi and pressure of between 44 and 73 psi at
3000 rpm but no spec for 2000 rpm for that engine.
>
> And I guess my question for the dealer who will be topping off the
> transmission fluid next week will be "Is 25psi cause for concern?"

The pressure sounds marginal. I'd be inclined to try an xW-50 synthetic oil
to see if that brings up the pressure enough to meet spec or at least keep
the light from coming on. A new oil pump might be an option but if the wear
is more generalized, then it might not help enough. Good luck!
> Jim

Ian S

"Jim Elbrecht" <elbrecht@email.com> wrote in message
news:4o9hf1penmsclsc51554dfrj2imdimen9o@4ax.com...
> "Ian S" <iws51remove@***.net> wrote:
>
> -snip-
> >Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at
2000
> >RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.
>
> Thanks Ian. I wonder why they ignore idle pressure on this engine?

Not sure but they give idle specs in the Bentley manual for the 1.8 turbo
four of 14.5 to 50.75 for types AEB and ATW and 19 psi for type AWM. This
may be because of the turbo. Haynes lists an idle pressure for the older
SOHC V6 of between 15 and 36 psi and pressure of between 44 and 73 psi at
3000 rpm but no spec for 2000 rpm for that engine.
>
> And I guess my question for the dealer who will be topping off the
> transmission fluid next week will be "Is 25psi cause for concern?"

The pressure sounds marginal. I'd be inclined to try an xW-50 synthetic oil
to see if that brings up the pressure enough to meet spec or at least keep
the light from coming on. A new oil pump might be an option but if the wear
is more generalized, then it might not help enough. Good luck!
> Jim

Ian S

"Jim Elbrecht" <elbrecht@email.com> wrote in message
news:4o9hf1penmsclsc51554dfrj2imdimen9o@4ax.com...
> "Ian S" <iws51remove@***.net> wrote:
>
> -snip-
> >Both the Bentley manual and Haynes give only the 29 psi (or 2 bar) at
2000
> >RPM minimum spec for oil pressure when oil is at 80C on the 30V 2.8.
>
> Thanks Ian. I wonder why they ignore idle pressure on this engine?

Not sure but they give idle specs in the Bentley manual for the 1.8 turbo
four of 14.5 to 50.75 for types AEB and ATW and 19 psi for type AWM. This
may be because of the turbo. Haynes lists an idle pressure for the older
SOHC V6 of between 15 and 36 psi and pressure of between 44 and 73 psi at
3000 rpm but no spec for 2000 rpm for that engine.
>
> And I guess my question for the dealer who will be topping off the
> transmission fluid next week will be "Is 25psi cause for concern?"

The pressure sounds marginal. I'd be inclined to try an xW-50 synthetic oil
to see if that brings up the pressure enough to meet spec or at least keep
the light from coming on. A new oil pump might be an option but if the wear
is more generalized, then it might not help enough. Good luck!
> Jim