cooling issue

[mkbruin]

So, my temp guage is wandering back and forth. At highway speed, temp drops to 1/4, in stop and go it can raise up to the red, but while in that same stop and go it will bounce around between the red and the 210 marker.

 

Perhaps bounce isn't the best descriptor. Moreso it moves/slides, but its always on the move either up or down.

'88, 4.0, closed system.

 

 

Might do a radiator swap. Am seriously considering new hoses. How about a replacement reservoir? I remember something about a volvo cannister working...

 

Whats the best way (read: cheap) to effectively refresh the cooling system?

[Red 1989 MJ]

The temp sensor is not very accurate. :dunce:

 

You could check your ground or buy a new one frome autopart.