If a rumbling noise is heard from the engine, along with a possible loss in power, it may be caused by a collapsed hydraulic timing belt tensioner creating excessive cam backlash. Our technicians recommend replacing the timing belt and water pump at the same time, if they have not been recently replaced.Google+
Car Problem Reports
Mazda MPV Rumbling Noise, Possible Loss of Power
Mazda MPV Problem
Engine Affected: 3.0L V6
Visitor, 1991 Mazda MPV, 3.0L V6, 217,485 mi
The timming belt makes a tractor sound while engine is running. Can even hear the noise bouncing off cars and buildings while in motion.