[Vwdiesel] coolant flange

[Johann Koenig]

On Saturday November  5 at 06:29am
Val Christian <val at mongobird.com> wrote:

> 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.

Hmmm. My mk2 has o-rings, but the mk1 had paper gaskets. The flange is
all metal and only has 2 tapped spots, for coolant temp gauge and glow
plug timer. The mk2 one only had 1 tapped spot. At least, I think its
all metal.

> > 
> > 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
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> > > > 
> > > 
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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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> > 
> 
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-- 
-johann koenig
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