[Biturbos4] Biturbos4 Digest, Vol 101, Issue 1

charles cmcnally5 at nycap.rr.com
Thu Dec 26 12:36:24 PST 2013 

Had the same problem. We flushed just the core (gently) with just garden 
hose water pressure and captured what came out. There was about 1/2 cup of 
silt. Ended up doing it twice but it did work eventually.
----- Original Message ----- 
From: <biturbos4-request at www.audifans.com>
To: <biturbos4 at www.audifans.com>
Sent: Thursday, December 26, 2013 3:00 PM
Subject: Biturbos4 Digest, Vol 101, Issue 1


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> Today's Topics:
>
>   1. B5 S4 heater core clogged (Ti Kan)
>   2. Re: B5 S4 heater core clogged (Brandon Rogers)
>   3. Re: B5 S4 heater core clogged (Ti Kan)
>   4. Re: B5 S4 heater core clogged (cH3Wy)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 26 Dec 2013 09:03:15 -0800
> From: Ti Kan <ti at amb.org>
> To: quattro at audifans.com, biturbos4 at audifans.com
> Subject: [Biturbos4] B5 S4 heater core clogged
> Message-ID: <20131226170315.GA31534 at bazooka.amb.org>
> Content-Type: text/plain; charset=us-ascii
>
> Hi all,
>
> The heater core on my 2001 S4 appears to be clogged, there is
> very little heat out of any vent even with the engine fully hot
> and the climate control temp set to HI.  The blower is working
> properly, all air flaps seem to work too.
>
> Replacing the heater core is a BIG job on this car, involving
> the removal of the center console, entire dashboard, and many
> things beneath it.  I don't have the time or the confidence
> that I could do this myself, and paying a shop to do it will
> be serious $$$.
>
> I read that a heater core can often be un-clogged by backflushing
> with either compressed air or water.  My mechanic is reserved
> about this method, saying that there is high chance that it
> would cause the heater core to spring a leak into the cabin,
> which would _force_ a replacement of the heater core.
>
> What is your opinion about this?  Should I try to backflush it?
> If so which is better, compressed air or water?  Just how sturdy
> are these heater cores?  According to the family album the same
> heater core is used on all B3, B4 and B5 Audis as well as the
> B5 Passat.
>
> -Ti
>
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 26 Dec 2013 17:27:29 +0000
> From: Brandon Rogers <brogers at terrix.com>
> To: Ti Kan <ti at amb.org>
> Cc: "biturbos4 at audifans.com" <biturbos4 at audifans.com>,
> "quattro at audifans.com" <quattro at audifans.com>
> Subject: Re: [Biturbos4] B5 S4 heater core clogged
> Message-ID: <CBAE25FC-FBA9-4D7E-8C2C-94142F544E63 at terrix.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hey Ti-
> My mechanic - who works on a lot of B5 S4s does the flush.  They highly 
> prefer it over heater core removal. I've not heard of them leaking.  That 
> said personally I'd skip pressurized air and stick with flowing water. 
> They did it to mine this summer.  My car has similar symptoms - the heat 
> is not hot - I get decent heat out of the center dash vents - especially 
> if I hit the recirc button.  Side dash cents are not as good. All others 
> are cold. Wondering/thinking i have issues besides the HC....
>
> Good luck
>
> Brandon
>
> Sent from my iPhone
>
> On Dec 26, 2013, at 10:13 AM, "Ti Kan" <ti at amb.org> wrote:
>
>> Hi all,
>>
>> The heater core on my 2001 S4 appears to be clogged, there is
>> very little heat out of any vent even with the engine fully hot
>> and the climate control temp set to HI.  The blower is working
>> properly, all air flaps seem to work too.
>>
>> Replacing the heater core is a BIG job on this car, involving
>> the removal of the center console, entire dashboard, and many
>> things beneath it.  I don't have the time or the confidence
>> that I could do this myself, and paying a shop to do it will
>> be serious $$$.
>>
>> I read that a heater core can often be un-clogged by backflushing
>> with either compressed air or water.  My mechanic is reserved
>> about this method, saying that there is high chance that it
>> would cause the heater core to spring a leak into the cabin,
>> which would _force_ a replacement of the heater core.
>>
>> What is your opinion about this?  Should I try to backflush it?
>> If so which is better, compressed air or water?  Just how sturdy
>> are these heater cores?  According to the family album the same
>> heater core is used on all B3, B4 and B5 Audis as well as the
>> B5 Passat.
>>
>> -Ti
>>
>>
>>
>>
>> _______________________________________________
>> Biturbos4 mailing list
>> Biturbos4 at www.audifans.com
>> http://www.audifans.com/mailman/listinfo/biturbos4
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 26 Dec 2013 09:48:30 -0800
> From: Ti Kan <ti at amb.org>
> To: Greg Amy <gregamy99 at gmail.com>
> Cc: "biturbos4 at audifans.com" <biturbos4 at audifans.com>,
> "quattro at audifans.com" <quattro at audifans.com>
> Subject: Re: [Biturbos4] B5 S4 heater core clogged
> Message-ID: <20131226174830.GA2039 at bazooka.amb.org>
> Content-Type: text/plain; charset=us-ascii
>
> The thermostat was defective and replaced within the past week,
> along with a full timing belt job (water pump, tensioners, etc).
> The coolant temp gauge now reads normal, and it rises to operating
> temperature quickly, but still no heat from the vents.
>
> -Ti
>
> On Thu, Dec 26, 2013 at 12:36:18PM -0500, Greg Amy wrote:
>> Are you SURE it's a blocked heater core? I had a heat issue with my B5-S4 
>> and it was the thermostat. Secondary symptom was the water temp gauge* 
>> reading oh-so-slightly lower than in did in summer.
>>
>> Block off half the radiator with cardboard and see what happens.
>>
>> -GA
>>
>> * Modern cars' temp "gauges" are nothing more than pretty idiot lights. 
>> Most take a lot of change in value to show a slight change in gauge 
>> position.
>>
>> > On Dec 26, 2013, at 12:03, Ti Kan <ti at amb.org> wrote:
>> >
>> > Hi all,
>> >
>> > The heater core on my 2001 S4 appears to be clogged, there is
>> > very little heat out of any vent even with the engine fully hot
>> > and the climate control temp set to HI.  The blower is working
>> > properly, all air flaps seem to work too.
>> >
>> > Replacing the heater core is a BIG job on this car, involving
>> > the removal of the center console, entire dashboard, and many
>> > things beneath it.  I don't have the time or the confidence
>> > that I could do this myself, and paying a shop to do it will
>> > be serious $$$.
>> >
>> > I read that a heater core can often be un-clogged by backflushing
>> > with either compressed air or water.  My mechanic is reserved
>> > about this method, saying that there is high chance that it
>> > would cause the heater core to spring a leak into the cabin,
>> > which would _force_ a replacement of the heater core.
>> >
>> > What is your opinion about this?  Should I try to backflush it?
>> > If so which is better, compressed air or water?  Just how sturdy
>> > are these heater cores?  According to the family album the same
>> > heater core is used on all B3, B4 and B5 Audis as well as the
>> > B5 Passat.
>> >
>> > -Ti
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > Biturbos4 mailing list
>> > Biturbos4 at www.audifans.com
>> > http://www.audifans.com/mailman/listinfo/biturbos4
>
> -- 
> Sent from Main Mission
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 26 Dec 2013 12:07:11 -0600
> From: cH3Wy <geraldo009 at yahoo.com>
> To: Ti Kan <ti at amb.org>
> Cc: "biturbos4 at audifans.com" <biturbos4 at audifans.com>,
> "quattro at audifans.com" <quattro at audifans.com>
> Subject: Re: [Biturbos4] B5 S4 heater core clogged
> Message-ID: <A86E74E1-8003-42B0-88F3-239AFEC20FBB at yahoo.com>
> Content-Type: text/plain; charset=us-ascii
>
> Heya man
>
> Ok first I would recommend you try flushing with water bc it very well 
> could fix your problem. Worse case scenario it clogs more or you get a 
> leak. Either way if those 2 happen then you have a bad heater core you'll 
> have to change it anyhow. Right next to your battery is a black loom. 
> Remove loom and it exposes the heater core hoses for supply and return. Go 
> to hardware store and buy some feet of I think 3/8 hose(don't trust me on 
> that but measure the ones on there). Also buy a fireman nozzle for your 
> water hose like this http://www.ecvv.com/product/766405.html
>
> Disconnect the heater core hoses. Coolant should come out. Connect that 
> hose you bought to one of the pipes and put that hose into a bucket. Then 
> put your fireman hose in the other pipe and first start water slow then 
> gradually increase(do not go full blast because you can damage heater 
> core). Once water runs clear swap and do the same thing to other side 
> going the other way.
>
> Hope it fixes your issue.
>
> Sent from my iPhone5S
>
>> On Dec 26, 2013, at 11:03 AM, Ti Kan <ti at amb.org> wrote:
>>
>> Hi all,
>>
>> The heater core on my 2001 S4 appears to be clogged, there is
>> very little heat out of any vent even with the engine fully hot
>> and the climate control temp set to HI.  The blower is working
>> properly, all air flaps seem to work too.
>>
>> Replacing the heater core is a BIG job on this car, involving
>> the removal of the center console, entire dashboard, and many
>> things beneath it.  I don't have the time or the confidence
>> that I could do this myself, and paying a shop to do it will
>> be serious $$$.
>>
>> I read that a heater core can often be un-clogged by backflushing
>> with either compressed air or water.  My mechanic is reserved
>> about this method, saying that there is high chance that it
>> would cause the heater core to spring a leak into the cabin,
>> which would _force_ a replacement of the heater core.
>>
>> What is your opinion about this?  Should I try to backflush it?
>> If so which is better, compressed air or water?  Just how sturdy
>> are these heater cores?  According to the family album the same
>> heater core is used on all B3, B4 and B5 Audis as well as the
>> B5 Passat.
>>
>> -Ti
>>
>>
>>
>>
>> _______________________________________________
>> Biturbos4 mailing list
>> Biturbos4 at www.audifans.com
>> http://www.audifans.com/mailman/listinfo/biturbos4
>
>
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>
> End of Biturbos4 Digest, Vol 101, Issue 1
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