[Vwdiesel] head gasket done but temp gauge still creeping up.

Will Taygan william at taygan.com
Fri Jan 30 00:19:20 PST 2009


Thanks for pointing out the boiling point.  It makes sense that it's
boiling, not necessarily leaking, but on my other 2 running 1.6 VWs I
can sit there all day without the coolant boiling out.  In fact, I run
the 91 eco with the cap loose all the time (leak around the water pump
when pressurized - replaced all hoses and it's still there, I haven't
been able to pinpoint it), and THIS one came with a drilled out cap
(since replaced).  After the new gasket this one is getting hot enough
that it's boiling..  It doesn't seem to be pressurizing too much, it's
just getting hot enough to boil out which is unusual.

Heck, if it's just the thermostat I'll be VERY happy.

Will in Alaska.

On Thu, 2009-01-29 at 19:5 6 -0800, Dave Cook wrote:
> Are you saying coolant is boiling out when the car is sitting there running?
> 
> That seems normal.  The boiling point increases under pressure, so without the pressure being held in by the cap, it'll boil at the normal point, and bubble out of the reservoir.
> 
> What if the cap is off?  On most of my VWs, I'd have to fill the system, drive around until it burped (sometimes took awhile) and pull over and top it off.  After that, no problems.
> 
> Dave Cook
> 

-snip-



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