Mechanics

99 ENGINE NOISE

1999 Ford Cougar • 2WD Manual • 80,000 miles

My 99 2.0l ford cougar is making strange noises. Firstly there is an intermittent knocking noises from the area around the fan belt but the belt does not feel loose. Secondly once the engine is warmed up there is also the sound of a blast of air escaping intermittently and it seems to affect the idle speed, any ideas?
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Pete2507
January 25, 2011.



Knocking noise might be harmonic balancer(the main crankshaft pulley).

Tiny
Fixitmr
Jan 25, 2011.