AAN What is this?

John Larson john at westcoastgarage.net
Sun Sep 5 15:37:15 PDT 2010


  On 11:59 AM, Jay M wrote:
> Question #1
> Talk about perfect timing Chris. Today, I just removed this leaking PITA hose from my 1995 S6. This hose connects the hard water line routed around timing cover and connects to the top of the turbo. It runs directly underneath the water collector and you need the hands of a midget to remove this hose working from the top of the engine. Is this the same hose you are talking about Chris? My hose has that exact same part number written on it and it appears to be the original hose but who knows, I just bought the car????. I just measured the old hose and it measures exactly 6 3/8" long with an inside diameter of 3/8". My concern is a guy (Dave?) who I was talking to at S-Fest who also has an Audi repair shop near Coventry Motors said he has replaced several of these hoses recently and the correct replacement hose should have an inside diameter of 8mm which is 5/16". This hose is in such a tight spot it would be a lot easier installing the larger 3/8" hose instead of the 8mm as suggested. Maybe this guy at S-fest was mistaken??? Does anybody know for sure what is the correct inside diameter for this hose?
> Question #2
> After noticing the small leak in the hose mentioned above, I think most of my cooling system's rubber hoses are original and should be replaced. My car has 151,000 miles on it. I am going to be replacing all of them this fall. The previous owner has replaced the recommended blue coolant with what looks to be the standard Prestone yellow/green coolant. I have heard several different arguments regarding going back with the G001 100 non phosphate coolant or the pink G12 coolant. After I properly drain and flush my entire cooling system with distilled water would it be better for me to refill with fresh yellow Prestone antifreeze or would it be OK and advantageous to use the Pentosin G001 100?
> Question #3
> I have a brand new Wahler 80 degree thermostat. Previous owner installed a standard 87 degree thermostat about 30,000 miles ago. I live in the Northeast U.S. Is it recommended to go with a cooler thermostat or am I just asking for trouble? I have never experienced any overheating with the current thermostat. Thanks.
>> Date: Sat, 4 Sep 2010 18:48:18 -0400
>> From: kentmclean at comcast.net
>> To: quattro at audifans.com
>> Subject: Re: AAN What is this?
>>
>> On 09/04/2010 06:20 PM, Chris Talley wrote:
>>> The hose is 034 121 471 APxo 10015 but I
>>> cannot find any correlation with that number.
>>> I cannot find any reference in the Bentley either.
>> The F.A. says it has been replaced by part number "N 020 262 1".
>> If you're searching, I understand you should look for "N 0202621"
>> with 2 spaces after the N. It gives you the same description and
>> remarks:
>>
>> Description: hose in coils of 5m.
>> Remarks: + 16.0 MwSt
>>
>> -- 
>> Kent McLean
>> 1990 200 Avant with V8
>> 1999 A4 Avant, V6 Tiptronic
>> gone - 1990 V8 w/5-speed and other mods
>> gone - 1991 200 TQA #3, with mods
>> gone: '91 200 TQA x2, '94 100 S Avant, '89 200 TQ "Bad Puppy"
>>
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>   		 	   		
Phosphate free green coolant has been pretty much gone from the 
marketplace for 2 or 3 years.  VW has dropped the blue coolant, as well 
as the common orange/pink, and dealers are now ordering the latest 
be-all-end-all version.  However, they are being rationed, or so I've 
been told by my local parts weenie, and it may still be a little hard to 
come by.  I would use it, given a choice.  As for the thermostat, you 
want to run the stock version, whatever that might be, because the 
entire engine management system is built around engine running at the 
correct temperature.  A cooler thermostat can, and usually does, kill 
your fuel mileage, besides making the car think it's still warming up.  
The hose:  There are NO hoses on a VAG product that are 3/8" ID.  
They're 3mm, 3.5mm, 5mm, 7 or 7.5mm, 9mm, 11mm, 12 mm, 14mm, and 
assorted other, larger, sizes.  There may even be a 4mm, I can't 
remember.  Using a hose that's larger than spec means you have to 
over-crimp it with the hose clamps, leading to deterioration, cuts, and 
leaks.  Get the right stuff.  With a few exceptions, you want hose rated 
for the fluid it carries.  Water hose for water, oil hose for oil and 
vent tubing, and fuel hose for fuel.  I've found you can pretty safely 
run modern FI hose in place of the smaller ID coolant hoses if water 
hose isn't readily available.

John



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