Loud fan noise from engine
#1
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Loud fan noise from engine
My engine makes a loud fan noise, that gets really loud when the RPM's increase. How do I know if the fan clutch is good? Should the fan rotate freely when the engine is off? or is this a normal noise for 3.4 4Runners?
#2
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Totally normal on a cold start. The fan clutch uses a silicone fluid. When you first start it up its settled and engages the fan. After about 5-10 seconds the fan should quiet down. It will also get loud when the temperature is high outside.
With a cold motor you should feel a lot of resistance on the fan. With a normal operating temperature motor there should be less resistance.
With a cold motor you should feel a lot of resistance on the fan. With a normal operating temperature motor there should be less resistance.
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