Car Running HOT, NOW WHAT?

Last night I pulled the big RAD hose off of the top of the engine and stuck
a hose in both the engine and RAD to make sure everything was full. I also
tested my RAD fan switch and it appears to be working fine. After the top up
I loosened the cap on the bottle so that the system could burp. Anyway the
temp gauge still hit 115 C before I shut it down.. Before I pull the
thermostat back out are there any other suggestions on how to get air out of
the system or anything else to try????




"HotRod" > wrote in message
...
>I purchased a 94 VW Golf Diesel a few months ago and it has been running
>great, except for the fact that it has been running hot. When I first got
>the car the temp gauge did not work so I replaced all of the temp sensors
>in the RAD and water jackets, three in all. This got the RAD fan and temp
>gauge working properly. BUT the car was still running at 110 F when it
>should be running around 90 F so I replaced the thermostat on the weekend
>and took the car out for a trip, it's still running around 100 - 115 F,
>when I had the thermostat out I inspected the water pump and it looks great
>and moves freely. WHAT AM I MISSING?
>

In article >,
HotRod > wrote:
>Last night I pulled the big RAD hose off of the top of the engine and stuck
>a hose in both the engine and RAD to make sure everything was full. I also
>tested my RAD fan switch and it appears to be working fine. After the top up
>I loosened the cap on the bottle so that the system could burp. Anyway the
>temp gauge still hit 115 C before I shut it down.. Before I pull the
>thermostat back out are there any other suggestions on how to get air out of
>the system or anything else to try????
>

warning: dangerous!

-fill up.
-install cap
-start car
-let it warm
-loosen clamp on top hose, let air escape, tighten clamp.
-cool down 2 hours
-repeat until no more air comes out...


--
Eduardo K. | Darwin pone las reglas.
http://www.carfun.cl | Murphy, la oportunidad.
http://e.nn.cl |
| Yo.

I pulled the thermostat last night and filled the car up with water and let
it run. THe car ran nice and cool except for the fact that without the
thermostat in the housing was leaking. I'm going to try a different
thermostat since when I tested this one in the house it wouldn't even open
until 110 C.

HotRod wrote:
> I pulled the thermostat last night and filled the car up with water and let
> it run. THe car ran nice and cool except for the fact that without the
> thermostat in the housing was leaking. I'm going to try a different
> thermostat since when I tested this one in the house it wouldn't even open
> until 110 C.

HUH! that doesnt sound right... should be mid-high 90s

I guess sometimes it is the simple, stupid stuff.

nate

I'm going to install a new thermostat tonight and see if that makes a
difference. Believe it or not I can now drop the power steering and remove
and re-install everything in about 30 minutes. I think it takes longer to
clean up the tools. I love how easy it is to work on this car.

OK I've installed a new thermostat this weekend and made sure to test if
before I put it into the car, it seems to be working fine, BUT the car is
still running hot 110+, I've followed the steps of warming the car to 110
and then loosening the cap to let the air out and then letting the car cool
down and starting over. I've done this about 6 times and it still doesn't
seem to be running any cooler. Any other ways to get the air locks out?

Once again I inspected the water pump and it seems to be fine.

"HotRod" > wrote in message
...
> OK I've installed a new thermostat this weekend and made sure to test if
> before I put it into the car, it seems to be working fine, BUT the car is
> still running hot 110+, I've followed the steps of warming the car to 110
> and then loosening the cap to let the air out and then letting the car
cool
> down and starting over. I've done this about 6 times and it still doesn't
> seem to be running any cooler. Any other ways to get the air locks out?
>
> Once again I inspected the water pump and it seems to be fine.
>

I going to say something that sounds daft, but I`ve done it and it works. I
run a MK2 Golf Gti, quite highly tuned. At one stage it even melted a
series of exhaust manifolds! My water temperature used to get silly high
too. So much so it regularly blew the expansion bottle. One day when I was
in a motor factors I discovered that there are several thermostats with
different opening thresholds.
I chose one that opened very early, 80+, and do you know, from that time on
even stranded on the M25, in a traffic jam, the old engine runs happily just
a shade on the cool side.
Please keep us up to date with your progress.
>

At one point I pulled the thermostat out of the car and ran it for a few
days without the thermostat and it ran nice and cool. Except for the fact
that I had to keep topping up the coolant because the housing wouldn't seal
properly without the thermostat and O Ring. I've considered drilling 90% of
the centre out of the old thermostat and then reinstalling it to see how
that holds up. I just can't figure out why it's running so hot with a new
thermostat.

"HotRod" > wrote in message
...
> At one point I pulled the thermostat out of the car and ran it for a few
> days without the thermostat and it ran nice and cool. Except for the fact
> that I had to keep topping up the coolant because the housing wouldn't
seal
> properly without the thermostat and O Ring. I've considered drilling 90%
of
> the centre out of the old thermostat and then reinstalling it to see how
> that holds up. I just can't figure out why it's running so hot with a new
> thermostat.
>
> A smear of sealing compound will mate the two surfaces of the thermostat
housing together. As to thermostats. There are choices for the retailer. But
to stock multiples of each costs money and in these inlightened days this
represents capital lockup on potentially slow moving items.
I would not advise removing the themostat. As well as regulating temperature
it also regulates flow pressure and might provide the water pump with more
work than it may be happy to handle long term. Also, and I do not know what
your winters are like, but on a cold moning it takes a long time for the
interior to warm up.
Just take a relaxed toddle round to a spare parts dealer, preferably not VW,
and see what the options are. I am almost certain you will be pleased that
you did. If you do`nt have any luck drop me a line and I`ll see if I can get
one to you.

Any recommendations on what temp. I should look at? I'm assuming I'm only
changing the temp that it opens at?




"HotRod" > wrote in message
...
>I purchased a 94 VW Golf Diesel a few months ago and it has been running
>great, except for the fact that it has been running hot. When I first got
>the car the temp gauge did not work so I replaced all of the temp sensors
>in the RAD and water jackets, three in all. This got the RAD fan and temp
>gauge working properly. BUT the car was still running at 110 F when it
>should be running around 90 F so I replaced the thermostat on the weekend
>and took the car out for a trip, it's still running around 100 - 115 F,
>when I had the thermostat out I inspected the water pump and it looks great
>and moves freely. WHAT AM I MISSING?
>