[Vwdiesel] low temps

[brian gochnauer]

With the outside air temps in the 15-20 F nights and upper 20's days my '98
Jetta is running way too cool, although the heater seems to be working
pretty good, but the temp gauge just doesn't seem to want to leave the
bottom of the guage.
On slightly warmer days I've gotten it to almost mid gauge (normal).
I'm put some cardboard in front of the radiator, but wonder if someone has
already figured out just how much cover it needs and at what temps to do
this.

Thanks,
Brian