Re: Stop my head gasket from blowing!
I'm thinking about similar matters.
My 1989 EA head seems fine, done 233,000km.
Like others, it just touches the "normal" zone. Reasonably steady there - dips a little, but you'd have to be looking for it. NEVER goes more than a mm into the normal zone.
Problem is during the cold weather, you turn on the heater and get a lukewarm blast of air.
I want HOT air, dammit!
Now, i thought about replacing the thermostat with one that will make the engine a little hotter, but am worried about that. I figured it would be better running cooler because of the 'overheating head' problems that EA's can suffer.
I now figure that I can replace the thermostat, and run another (cooler - like my current) one when the weather gets warmer.
I am a little worried that it's running so cool - could account for poor economy.
So what's the advice?
Stick with current one (because it's getting towards summer)?
Change as required, putting current one back later, in a couple of months?