[V6-12v] Temp. gage reading low, trouble code 2312

[Lino M. Valadas]

I just replaced my thermostat on a 1993 90 Quattro Sport. I used these
instructions as a guideline (thank you to the author), but I feel it can be
improved a bit:

First of all I'm not sure for which car the original BTDT was written but
for a 93 90q you must remove the fans and shroud as one piece off the
radiator in order to do any work to the front of the engine.  So do this
first.  Not too difficult, just three bolts on top and don't forget to
disconnect the wires below, of course the belly pan has to be removed
first..

The other additional step I would add to the procedure would be to loosen
the timing belt adjustment.  This allows the timing belt to be moved out of
the way and the thermostat housing comes out very easily.  Don't forget to
re-adjust the timing belt tension when your done.

Apart from the above this procedure was spot on.  The whole job should take
no more than a couple of hours with no interruptions.  This is assuming you
have worked on these cars before.

Cheers

Lino




----- Original Message -----
From: "Peter" <subscriptions at globalape.com>
To: "Tom Christiansen" <tomchr at ee.washington.edu>
Cc: "Audi list" <v6-12v at audifans.com>
Sent: Thursday, January 15, 2004 10:39 AM
Subject: Re: [V6-12v] Temp. gage reading low, trouble code 2312


> I just replaced my thermostat  2weeks a go and wrote this procedure up
> for another person enquiering  about it.
>
> You do not need to remove the timing belt but it is very tight squize.
>
> here is what I did:
>
> remove the cover from the engine, and the right side (passenger side) of
> the timing belt
> loosen the tensioner for the regular belt
> remove the regular belt
> remove the tensioner for the regular belt
> remove the shroud from under the engine
> drain coolant (red plug on rad ->bottom left side, driver side)
> the thermostat housing has 2 screws
> you will need to wiggle the thermostat housing out from under the timing
> belt (it's hard)
>
> At this point you will see the thermostat, you can just pull it out (my
> was actually broken into 2 separate pieces !)
>
> to put things back together, just reverse the procedure
>
> Side note: after you fill up the coolant you might need to bleed the
> ventilation system.  The bleeder valve in on a rubber house near the
> middle and top of the engine compartment.
>
> good luck
>
> --
>
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>
>
> Tom Christiansen wrote:
>
> >Clive,
> >
> >
> >
> >>When I did my pump and stat I changed to the new pink coolant ( I think
it
> >>is called G12 or something, cost me 48.00 CAD from the stealer for two
jugs
> >>but it is suppose to last the service life of the engine. A real pain
> >>getting the old stuff out though, flushed it many times and drained it
> >>through the block drain at the rear of the engine. May not be worth
doing
> >>but thought I would mention it . I could have put one of those prestone
> >>flush kits on the heater hose but I am a bit of a purist that way.I do
not
> >>like cutting into lines and adding stuff.
> >>
> >>
> >
> >Ouch!! C$48 for coolant is pricey stuff. Not terrible, but definitely
> >twice the price of regular Prestone...
> >
> >The timing belt is due in 10k miles or so. That should last me six
> >months to a year. I am thinking to do it "now that I'm in there anyway"
> >but I dunno... I would be sorta surprised if the thermostat runs much
> >more than $10. Then I can worry about the T-belt later. When I do the
> >T-belt, I'll replace the water pump and thermostat as well - even though
> >the T-stat will only have 10k miles on it by then. At that point I'll
> >probably switch to the Audi coolant.
> >
> >Tom
> >
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> >
> >
> >
>
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