[s-cars] Multi Function Temp Sensor or Thermostat?

[Joe Pizzimenti]

Don't forget to remove the transmission


On Thu, 16 Dec 2004 11:47:36 -0500, Tom Green <trgreen at comcast.net> wrote:
> Only a masochist would claim this is an easy fix, since "you could
> drain the
> radiator", means you could also remove the engine pan so you can get to
> the
> drain cock and place a drain pan as any good American would.  Probably a
> good time to flush and refill with that "cheap" antifreeze also since
> you will
> most likely lose most of the coolant anyway or you will realize how old
> it is. ;-)
> 
> Did I mention that it's cold outside.  Hopefully you have a nice inside
> place to do all this.
> It is no coincidence that the thermostat failure gets to the "fix it
> now" stage just as the polar
> air gets firmly established in Canada.
> 
> The timing belt r&r procedure on urs4.com has a photo of the thermostat
> installation,
> however everything in the way normally has been removed and you can't
> see much of
> the o-ring underneath.
> The 10 mm bolts on the plastic housing require 7 ft-lbs torque.
> 
> Tom '95 S6
> 
> Previously written:
> > Date: Wed, 15 Dec 2004 20:59:08 -0700
> > From: Brian Powell <powellb at gmail.com>
> > Subject: Re: [s-cars] Multi Function Temp Sensor or Thermostat?
> > To: Rich Beebe <rich at beebecomm.com>
> > Cc: manuelsanchez at starpower.net, s-car-list at audifans.com
> > Message-ID: <910ae2660412151959b1cb590 at mail.gmail.com>
> > Content-Type: text/plain; charset=US-ASCII
> >
> > Well, the first mark is 60C, then, the next labelled mark is straight
> > up at 130C I think (I am going from memory). In between is an unmarked
> > tick which is normal operating temp, 100C. You should be at or above
> > that mark after a few minutes of driving. Under hard driving in 100+F
> > ambient, it can get up towards vertical (though, I've personally never
> > seen one get vertical).
> >
> > If you oil temps are not getting much above 60C, that is not a good
> > thing. It sounds like your thermostat is stuck open. It is cheap and
> > easy to fix. You'll need a new thermostat(should come with a seal) and
> > some coolant. I find it easier to remove the intake boot, then, use
> > some "wobbly" extensions with a 10mm socket to remove the two screws
> > in the thermostat housing. Pull it back--coolant will pour out
> > everywhere (you could drain the radiator first if you like). Get
> > something to pry out the old thermostat (they stick in there nicely).
> > Put the new thermostat in the same orientation as the old one (brass
> > strip should be vertical), put the thermostat housing back on (IIRC,
> > 12 ft-lbs torque--anyone?) and refill the coolant. I like to make sure
> > the coolant is properly filled, so, I remove the bleeder valve from
> > behind the firewall (under the plastic cover) and fill the expansion
> > tank. It will slowly cylce into the whole system with gravity (it
> > takes about 10-20 minutes) and once it starts coming out of the
> > bleeder valve, close up the valve, top off the expansion tank to the
> > mark, and you are done.
> >
> >
> > On Wed, 15 Dec 2004 22:40:16 -0500, Rich Beebe <rich at beebecomm.com>
> > wrote:
> >> brian et al,
> >>
> >> i noticed my water temps staying very low today (around the 2nd thin
> >> mark), until i stopped at a red light (about 8 miles from the house),
> >> at which point it rose to roughly to the first thick mark, iirc. what
> >> you mentioned below about oil temps is what has me thinking, though.
> >> my oil temp gauge never moves from the far left of the gauge. i
> >> noticed this upon buying the car and was told that they all read
> >> low and it's normal. 2 questions - where 'should' my oil gauge 'read'
> >> and could i have a similar thermostat problem? tia.
> >>
> >> rich <-- feeling bad for asking so many questions, but i'm new to
> >> audis.
> >>
> >> From: Brian Powell <powellb at gmail.com>
> >>
> >>> The easiest way to check is to see what your oil temps are doing. If
> >>> the thermostat is stuck open, it will be hard for the oil to get to
> >>> operating temp. If your oil is at or past the thick mark and the
> >>> coolant temp reads quite low, then it is the MFTS. If the oil temp
> >>> isn't getting up to operating temp, then it is definitely your
> >>> thermostat.
> >>>
> >>> The thermostat is pretty easy to do on this car. Just makes a
> >>> mess... :)
> >>
> >>
> >
> >
> > --
> > Cheers,
> > Brian
> >
> >
> > ------------------------------
> >
> > Message: 8
> > Date: Wed, 15 Dec 2004 23:10:04 -0500
> > From: Rich Beebe <rich at beebecomm.com>
> > Subject: Re: [s-cars] Multi Function Temp Sensor or Thermostat?
> > To: Brian Powell <powellb at gmail.com>
> > Cc: manuelsanchez at starpower.net, s-car-list at audifans.com
> > Message-ID: <BDE674CC.65511%rich at beebecomm.com>
> > Content-Type: text/plain; charset=US-ASCII
> >
> > well, since my oil temp gauge never seems to move at all, i'd
> > say a new t-stat is in order. i'm glad this post came up, as i
> > was never comfortable with the idea that the gauge should read
> > (normally) where it was. thanks very much for the insight.
> >
> > rich
> >
> >> From: Brian Powell <powellb at gmail.com>
> >> Reply-To: Brian Powell <powellb at gmail.com>
> >> Date: Wed, 15 Dec 2004 20:59:08 -0700
> >> To: Rich Beebe <rich at beebecomm.com>
> >> Cc: manuelsanchez at starpower.net, s-car-list at audifans.com
> >> Subject: Re: [s-cars] Multi Function Temp Sensor or Thermostat?
> >>
> >> Well, the first mark is 60C, then, the next labelled mark is straight
> >> up at 130C I think (I am going from memory). In between is an unmarked
> >> tick which is normal operating temp, 100C. You should be at or above
> >> that mark after a few minutes of driving. Under hard driving in 100+F
> >> ambient, it can get up towards vertical (though, I've personally never
> >> seen one get vertical).
> >>
> >> If you oil temps are not getting much above 60C, that is not a good
> >> thing. It sounds like your thermostat is stuck open. It is cheap and
> >> easy to fix. You'll need a new thermostat(should come with a seal) and
> >> some coolant. I find it easier to remove the intake boot, then, use
> >> some "wobbly" extensions with a 10mm socket to remove the two screws
> >> in the thermostat housing. Pull it back--coolant will pour out
> >> everywhere (you could drain the radiator first if you like). Get
> >> something to pry out the old thermostat (they stick in there nicely).
> >> Put the new thermostat in the same orientation as the old one (brass
> >> strip should be vertical), put the thermostat housing back on (IIRC,
> >> 12 ft-lbs torque--anyone?) and refill the coolant. I like to make sure
> >> the coolant is properly filled, so, I remove the bleeder valve from
> >> behind the firewall (under the plastic cover) and fill the expansion
> >> tank. It will slowly cylce into the whole system with gravity (it
> >> takes about 10-20 minutes) and once it starts coming out of the
> >> bleeder valve, close up the valve, top off the expansion tank to the
> >> mark, and you are done.
> >>
> >>
> >> On Wed, 15 Dec 2004 22:40:16 -0500, Rich Beebe <rich at beebecomm.com>
> >> wrote:
> >>> brian et al,
> >>>
> >>> i noticed my water temps staying very low today (around the 2nd thin
> >>> mark), until i stopped at a red light (about 8 miles from the house),
> >>> at which point it rose to roughly to the first thick mark, iirc. what
> >>> you mentioned below about oil temps is what has me thinking, though.
> >>> my oil temp gauge never moves from the far left of the gauge. i
> >>> noticed this upon buying the car and was told that they all read
> >>> low and it's normal. 2 questions - where 'should' my oil gauge 'read'
> >>> and could i have a similar thermostat problem? tia.
> >>>
> >>> rich <-- feeling bad for asking so many questions, but i'm new to
> >>> audis.
> >>>
> >>> From: Brian Powell <powellb at gmail.com>
> >>>
> >>>> The easiest way to check is to see what your oil temps are doing. If
> >>>> the thermostat is stuck open, it will be hard for the oil to get to
> >>>> operating temp. If your oil is at or past the thick mark and the
> >>>> coolant temp reads quite low, then it is the MFTS. If the oil temp
> >>>> isn't getting up to operating temp, then it is definitely your
> >>>> thermostat.
> >>>>
> >>>> The thermostat is pretty easy to do on this car. Just makes a
> >>>> mess... :)
> >>>
> >>>
> >>
> >>
> >> --
> >> Cheers,
> >> Brian
> >>
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
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> > S-CAR-List at audifans.com
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> >
> >
> > End of S-CAR-List Digest, Vol 14, Issue 72
> > ******************************************
> >
> 
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