My husband and I have a small trucking company, older pre egr trucks. We do most of the mechanical work ourselves but came here because we get stumped with this Mack CH 613 we have.
Have an 01 Mack with an E7, was overheating, changed the thermostat and the fan switch. Now it is still overheating and the fan switch still never kicks on but leaks air as soon as the truck is shut off, air is leaking from the fan. What should I look for?
