I think he's wrong too. I have an '87 2.1WBX with (I'm assuming) the original tanks. Both have max fill marks. While maintaining the coolant at those levels the temp gauge needle sits at the center of the led light.

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> On Apr 26, 2016, at 1:48 PM, Dan N <dn92610@GMAIL.COM> wrote:
> 
> hi all,
> 
> Recently I had a discussion with a guy regarding filling the coolant
> reservoir, the main with a blue cap - on 2.1 WBX engine...
> 
> - me: I always fill it as much as to the max and fill the overflow tank to
> max at the cap.
> 
> - him: he fills the main reservoir only half way at the seams of the tank
> fill the overflow tank to max line
> 
> I think he's wrong...
> 
> what do you think?
> 
> thanks
> 
> dan