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My rav4 sounds like a jet engine. a constant whine
My 1998 rav4 sounds like a jet engine. a constant whine that goes up in pitch as you accelerate. GOES LOWER IN PITCH AS YOU DECELERATE. What can it be ?
oh actually forgot to put it on ,if the belt is tighten ,use wd 40 squirt on fan belt and usaully goes quiet if that the case ,u need a replacement fan belt oh actually forgot to put it on ,if the belt is tighten ,use wd 40 squirt on fan belt and usaully goes quiet if that the case ,u need a replacement fan belt
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remove the belt and start the engine ..IF THE NOISE disappear it might be idler bearings that driven by belt but if the noise still there check the pcv valve..
Check the power steering fluid if its low it could cause this. Also could be alternator, water pump, ac compressor, or idler pulley. My bet would be on the idler pulley, its the one that keeps the belt tension constant. Remove the belt and check this pulley for slack also spin it by hand.
Good luck, dont forget to rate.
You may have a bad idler pulley. Locate it, spray a lubricant (WD-40) behind it. You don't want to get it on the belt surface. If the noise goes away, you have found the problem.
Sounds like a dry/failing bearing or power steering pump noise. You first need to try to track down where the noise is originating, and the most likely place is at the front of the engine.
I would start by listening with the hood up while parked with the engine running and the noise present, and seeing if it is coming from there. If so, the most likely cause is something connected to the belt - e.g. AC compressor clutch, tensioner, power steering pump, or generator. Can also be caused by the belt just slipping (warn out belt, tensioner not working properly).
Have you crawled under the vehicle and personally inspected your exhaust line from manifold to tail pipe? The roaring sound usually occur when there is a hole in the exhaust line. I had it happen to my forester before. A hole half the size of a dime made my subaru sound like my old 74 chevy pickup.
only on acceleration
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