[Vwdiesel] VW Diesel engine running too hot

[Shawn Wright]

My 1.6TD oil temps run about the same, except for extreme, long climbs, where I've seen up 
to 275F over Roger's Pass last summer, fully loaded. Last week's trip over the Coqihalla, 
which presents a 17km 8% grade, saw only 250F oil temps, probably due to less weight in 
the van and cooler weather. This is measured from the oil filter flange using a 300F VDO 
sender/gauge. I now have a Volvo 240 cooler, which I plan on installing, as I am not confident 
that a larger oil-water cooler will be enough given the diesel vanagon plumbing setup, which 
either unloads heat from the oil into the head, or reduces the coolant flow to the head, take 
your pick. I did install the stock aux water pump, and it does seem to even out the oil temps 
for a while, but once they go beyond 240F on a long climb, they just seem to spiral, and take 
a long time to come back down. 

I am running a stock (actual VW) coolant t-stat at 87C. Water temp is very steady except for 
long climbs, so it seems to work as designed. I have removed and flushed rad inside and out, 
and believe it to be working well enough, even though it has nearly 500k and 18 years on it. I 
know that I have some cavitation inside my water pump housing, so coolant flow may be 
down somewhat. 

On 6 Oct 2006 at 8:41, 82 Diesel Westy <dieselwesty at yahoo.com> wrote:

> So, from reading some of this is sounds like I should
> be looking at the bigger oil cooler for my 1.9na in
> the Westy.  The one from an 1.9TD AAZ is bigger and I
> have it.
> 
> My OIL temps are running 220F <-> 240F depending on
> the load of the engine cruising or mountain climbing
> Trying to maintain highway speeds.
> 
> Does anyone else have an oil temp guage on 1.6na or
> 1.9na motor.  My NEW VDO pickup is in the oil filter
> flandge, BTW.
> 
> Thanks, Bryan
> 
> --- Rudy <petersenrudy at hotmail.com> wrote:
> 
> > Make sure all the cooling system components are
> > working properly, install an
> > 87 degree Celsius Thermostat and run it.  195 to 200
> > degrees F is not too
> > hot.
> > 
> > Rudy 
> > 
> > -----Original Message-----
> > From: vwdiesel-bounces at vwfans.com
> > [mailto:vwdiesel-bounces at vwfans.com] On
> > Behalf Of Sherwin Goff
> > Sent: Thursday, October 05, 2006 5:44 PM
> > To: vwdiesel at vwfans.com
> > Subject: [Vwdiesel] VW Diesel engine running too hot
> > 
> > Over-heating:
> >   Here are the symptom:
> >    
> >   I have a very nice 83 Westy with the 1900 engine
> > and a 5 speed; however,
> > it runs with the needle straight up or even a little
> > to the right of top
> > center. This is too hot. I do not like for it to run
> > this hot. (My 82 also
> > did this same thing, and I experienced early engine
> > failure because of it.) 
> >    
> >   Over and over again, I have checked this out at
> > cooler times and in cooler
> > climates. At those times the nettle always stays
> > where it belongs--in the
> > LITTLE BOX on the temperature gauge--to the left.
> > This position is where the
> > engine thermostat should normally keep the engine
> > temperature. The
> > temperature must be controlled by the
> > thermostats--not by the radiator fan.
> >    
> >   I believe this is an engineering problem. I have
> > had only one Diesel
> > Rabbit that always ran inside the little box on the
> > heater gauge. All of the
> > rest of them have run much hotter than their
> > thermostat. Overheating these
> > engines is a number one cause for early engine
> > failure. 
> >    
> >   Is there a radiator capacity problem here? Is the
> > radiator too small, or
> > does the radiator have fewer fins than it needs? The
> > problem is not the
> > engine nor the thermostat. It has to do with
> > cooling.
> >    
> >   My experience with all VW diesels (and I have had
> > many) has been that they
> > are IMPROPERLY ENGINEERED to run as cool as they
> > should--else why do they
> > all run hotter than their thermostat would otherwise
> > allow? 
> >    
> >   (Do ya'll understand what I'm trying to explain
> > here?)
> >    
> >   So now here is my question: 
> >    
> >   What has been your experience for SOLVING this
> > problem.
> >    
> >   Thanks to all of you,
> >    
> >   Sherwin
> >    
> > _______________________________________________
> > Vwdiesel mailing list
> > Vwdiesel at vwfans.com
> > http://www.audifans.com/mailman/listinfo/vwdiesel
> > 
> > _______________________________________________
> > Vwdiesel mailing list
> > Vwdiesel at vwfans.com
> > http://www.audifans.com/mailman/listinfo/vwdiesel
> > 
> 
> 
> Bryan Belman, Pt Pleasant, NJ
> 04 Jetta Wagon TDI PD, 100hp, 5sp   -- running :)
> 82 Diesel Westy 1.9NA               -- running :)
> 92 Jetta Eco-Turbo Diesel           -- not running yet <:>
> 90 Audi 200, 2.2L Turbo FWD         -- runs some times, need to sell :(
> 70 Type 1 stock Beetle              -- Not running well :(
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Shawn Wright
http://members.shaw.ca/vwdiesels
'88 Westy 1.6TD 5 speed
'85 Jetta Diesel 1.6NA