Mack help

[kracer58]

I have a 98 mack with a 427. When I let it idle anti freeze shoots out the over flow. But when I drive the truck it stops. I just can't let it idle. If anybody can help it would be awesome.

 

[zero3nine]

Try replacing the thermostat with a lower temperature unit. 180 degrees perhaps.

fired at you from my Droideka