Quote:
Originally Posted by CaptSlow
It went all the way up to 250 degrees, the extreme right side of the gauge. 
After I put in the new expansion tank, I'll do the tests blue62 recommended and see what happens. |
Also do as Gabe says.
Pressure test the coolant system, after replacing the coolant tank.
A coolant system pressure test kit can be had from Harbour Freight for around $90.00.
The kit has adapters so you can test most any coolant system out there.
Also allows you to test the coolant cap.
If you need pointers on correct procedure for compression testing and vacuum testing let me know.