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My engine makes a high noise on starting at the fan belt area, though the noise stops after two minuts, whats making the noise.
I have a toyota camry 1996 model. when ever i start the car, a noice is generated at the fan belt area which stops at about two minites. whats making the noice.
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start with premium gas or injector cleaner, could be a low octane ping. this may be hard to diagnose with out hearing the noise so the other thing i would have you do is remove the belts and run the engine. sometimes when a bearing in an alternator, idler pulley, a/c compressor or belt tensioner goes bad they can make a clicking noise. try to listen if the noise is coming from the belt area, the transmission area or some other spot. spin all the pulleys with the engine off and wiggle them to see if any are bad
have it checked either at a local shop or dealer my scan tool reads in minutes and depending on problem how long to repair. i scan a lot of cars for free at our dealership.
I do think that loose key and keyway could cause the knock. It would also explain the loss of power, due to the engine timing not being spot on.
A knocking big end or main bearing would not improve at higher revs, it would get worse.
Act soon before the keyway in the crankshaft itself is too badly damaged, by removing the crankshaft pulley, lower timing belt cover, and belt guide. You can then get a precise idea of what exactly is worn. This may assist
You may actually have to find an oversize key, for a neat fit in the crankshaft. It may be necessary to file or grind it to fit. Engineering supply houses stock them, eg
Either coolant temperature sensor isn't keeping the fan on long enough ( has a resistance problem) relay is opening the circuit too soon because its worn,water pump is defective( remove it belt and check for looseness at the pulley),coolant and thermostat need replacement.
Yes if it hydraulically operated it could be because the pump for the fan is bad. If I am not mistaken the fan is run off of the power steering pump correct. check and make sure the pump is working correctly. I have not seen a hydraulic motor on a car I know they put them on a lot of diesel trucks like humvees and some Chevy diesels but not on a car. Most are usually electrical. I know on humvees with a hydraulic fan they have a fan controller check this and make sure it is working right you can unplug the controller and the fan should stay ingaged and turn faster.
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