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Date:         Mon, 29 Sep 1997 08:14:53 CDT
Reply-To:     Joel Walker <JWALKER@UA1VM.UA.EDU>
Sender:       Vanagon mailing list <Vanagon@Gerry.SDSC.EDU>
From:         Joel Walker <JWALKER@UA1VM.UA.EDU>
Subject:      Re: Rear Heater core leaking (help)!
Comments: To: Jamie Smith <james_f_smith@GROTON.PFIZER.COM>
In-Reply-To:  <9708298755.AA875549562@groton.pfizer.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII

IF it is the core, yeah, it'll have to be replaced to stop the leak ... unless you do like i do and just don't use the rear heater. ;)

but for bleeding, there is a little screw-thingie on top of the heater valve (core?) that is a bleed screw. this is what usually starts leaking ... the original ones were plastic. vw dealers are supposed to be able to get a new bleed screw as a replacement part.

here's some tech info ...

from Service Bulletins, Model Year 1987 ........................................................................ VW Technical Information Group 80, Number 87-01 Date: July 31, 1987 Model(s): Water-cooled Vanagons, 1983-1985 Subject: Carpet wet by rear seat - heat exchanger bleeder screw broken

The plastic bleeder screw for the rear heat exchanger may be broken due to seal swelling. * Replace with an improved metal bleeder screw, Part number N 902 061 01. and new gasket, Part number 861 819 037.

Production Change: Metal bleeder screw installed as of: December 1984, VIN: 25 FM 050 887 ------------------------------------ <jwalker@ua1vm.ua.edu> as of 1995.04.04, this part number N 902 061 01 was invalid. the newer part number for the Bleeder Screw, as seen on the 1993 Microfiche for Vanagons 1983-1985 and Vanagons 1986-1991 is 861-819-039. the gasket number is still the same. BUT the new Bleeder Screw seems to be plastic again, not metal. in fact, two reliable parts people have said that there were never any "metal" bleeder screws ... only plastic. so apparently this tech info is wrong. but a new bleeder screw might solve the leaking. ......................................................................... VW Technical Information Group 19, Number 87-03 Date: December 21, 1987 Model(s): Vanagon, Water-cooled, model years 1983-1985 Subject: Carpet wet by rear seat - heat exchanger T-piece leaking

A coolant leak in the rear heat exchanger area may be due to poor hose fit at the metal T-piece which connects the fee hose to the main coolant hose. An imporved, white plastic T-piece with slightly larger diameter is available to correct this condition: * Replace metal T-piece with white plastic version, Part number 253-265-543A * Remove flow restrictor from inlet fitting of heater valve.

Production Change: Improved T-piece installed as of Nov. 1984, VIN 25 FH 037 898.


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