Most cars have two to four motor mounts. A bad motor mount will cause vibration or knocking from the engine. You can test for a bad motor mount visually or by rocking it by hand. Replacing motor ...
Motoring Chronicle on MSN
How to fix AC in a car blowing hot air
When your car air conditioning blows hot air, the system is failing at one of three jobs: moving refrigerant, shedding h ...
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