Hi all, I was doing some looking over of the 80 after reinstalling my newly bedlined fender flares,
and noticed this white, chalky build-up on the thermostat housing. Also coming from hose coming down into top of thermostat housing. My guess is gasket leak, hose getting old and leaking, maybe new thermostat while I have it open? Not sure. I can see the top hose runs back along the engine into the firewall for HVAC controls. Not sure where to go from here. I put some pics of what I am seeing, I wiped some of the crud off. First time I have noticed it. It has not run hot or even close to hot, always at just below middle of gauge, even with A/C on.