overheating 4.7 wj
ok my girlfriends 4.7 keeps on overheating. Replaced the thermostat, though it was fixed but started doing it again. Then I found a massive air lock in the upper coolant hose, so I bled it.... Good for a few weeks then the air lock came back.... Bled it, replaced radiator cap, sealed the bleeder screw up good, good for a month or so and now it just did it again. Anyone have any idea where the air lock is coming from or where the coolant could be going??? Help!