Hello All,

I have done a few searches on the subject but have not found a whole and complete answer.

Some months ago, i added water to my reservoir because i noticed it was low.

Just recently, 3 weeks or so, I started to notice some Boil over and out at the reservoir cap. It would boil out, and I'd add more water. It never over heated and the gauge in the cab never moved out of Normal Range- right on the "N"

Just recently, it had got considerably worse- it gauge beagan to reach the very bottom of the red on the thermostat gauge. But never reached the "RED" zone.

This weekend I replaced the thermostat and it still pegs up under the red of the gauge, but now it Falls a bit and stays hot it the upper rankings of "Normal Range" and still tends to boil over at the Cap.

I feel like replaceing the Thermostat has helped... but it doesn't actually seem to have done much.

The Volvo Mech i spoke with said that it was less likely the Fan or waterpump - because they either work or dont, and the fan works, and the water pump seems to be pumping- it certianly isn't leaking or making any noise.

So my question to you all is-

How would you diagnose the issue on the most limited of funds. I cant afford to take it to a shop. I need a viable way to rule things out so I can get to work- its my daily driver.

thank you all so much.

Gaz.
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1979 245 DL