[Vwdiesel] coolant flange

[Val Christian]

The sensor o-rings I'm refering to are rubber (buna-N?) type o-rings,
19mm x ~2mm.  They seal the temp sensors in the three-headed monster flange
that attaches to the cyl head.  That flange is plastic and metal, 
but all the surfaces that mate are plastic.  Eventually, the plastic
de-bonds from the internal metal, and they develop very slow leaks.

I've seen the o-rings on my 91NA, and on other late 80's engines. 
Sorry if I've misled anyone.

Val


> 
> Val,
> 
> For the sensor o-ring, do you mean the copper washer? Mine all have those, and 
> they seem to last forever. Or are speaking of the later model plastic sensors? I had 
> those on my WBX Vanagon - I'll take the early style ones anyday! Also, my coolant 
> flange to head doesn't seem to have an o-ring, nor a place for one that I can recall. 
> I'll have to look again, since my TD used a flat gasket from the kit, and it's leaking. 
> 
> On 4 Nov 2005 at 18:53, Val Christian <val at mongobird.com> wrote:
> 
> > I'd suggest just buying a new one.  They all fail after some number of 
> > thermal cycles.  Be sure to get the o-ring to mount it to the block, and
> > the two o-rings for the sensors.  I keep spares of all the o-rings.
> > 
> > I was coming back from a basketball game in Buffalo one time, and the
> > o-ring blew.  The failure is crippling.  It turned out that I had some 
> > athletic tape on hand.  I made an o-ring, and got some water, and limped
> > home, with the pressure cap loose.  Not a good time.  Since then, I keep
> > the o-rings.  The sensor ones are 19mm or 3/4", and once you have one 
> > from VW, you can get a close match at your car parts place.  A cheap 
> > $0.19 spare for the glovebox.
> > 
> > (At home, I keep one spare thermostat o-ring, two flange o-rings, and
> > a bag of five sensor o-rings.  In the car, I keep a sensor o-ring,
> > and larger tiewraps, and athletic tape (learned that one by luck)).
> > 
> > Val
> > 
> > 
> > 
> > > 
> > > I just broke my coolant flange trying to force it off some rusted
> > > studs. This is the one that goes into the head and has two temp sensors
> > > (one for temp gauge, one for glow plug timing). It was an '82 NA
> > > engine. If anyone has one they'd be willing to sell me, I'd really
> > > appreciate it.
> > > 
> > > Thanks
> > > -- 
> > > -johann koenig
> > > _______________________________________________
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> > > Vwdiesel at vwfans.com
> > > http://www.audifans.com/mailman/listinfo/vwdiesel
> > > 
> > 
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> 
> Shawn Wright
> http://zuiko.sls.bc.ca/~swright
> '85 Jetta D 
> '88 Westy 1.6TD 5 speed
>  (see progress at http://members.shaw.ca/vwdiesels)
> '82 Diesel Westy
> 
> 
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