[s-cars] UrS4 Heater Core replacement

Tom Green trgreen at comcast.net
Sat Jul 30 09:38:37 PDT 2011

I didn't find the invoice from the dealer to verify, but I ordered  
this part from the dealer twice and
received one only half as long as the original part.  The parts guys  
were perplexed as well when
I showed them the original part and where it went, but could only  
offer, "buy two".  They were
about $20 each so I rejected that idea.  The part # appears correct  
and shows to be 1360mm long.

The importance of a good seal cannot be over-emphasized.  Any part  
without a perfect seal will
leak into the cabin since the opening is at the bottom of the plenum.   
The foam seal is impregnated
with a tar-like sealant that provides the proper water-tight seal when  
compressed.  Ordinary foam
seal will not provide the watertight seal necessary.


On Saturday July 30, 2011, at 2:55 PM,  Duncan Thomson <thomson.duncan at gmail.com 
 >  wrote:

> Hi guys,
> quick favour... have my heater core out, and the procedure I'm  
> following
> lists an airbox seal:
> "For re-assembly, purchase a new airbox seal, part number 431 819  
> 225."
> I assume this is the foam seal that seals the entire heater box into  
> the
> firewall, does anyone have the etka pic handy so I can confirm?
> Cheers
> Duncan

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