Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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MHPAUTOS
CAR REPAIR CONTRIBUTOR
31,937 POSTS
Have the cooling system pressure tested for leaks, the heater often loose coolant and gets an air lock, start here.
mark (mhpautos)
Feb 10, 2011 at 10:18 AM
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RASMATAZ
CAR REPAIR CONTRIBUTOR
75,992 POSTS
If the thermostat is shut closed it will cause the engine to overheat and no heat-could also be airlock if you're replenishing the coolant and not bleeding it