My wife has a 2009 Toyota Corolla and it is making a purring noise?

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Old 31 Mar 2014, 11:39 pm   #1 (permalink)
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Default My wife has a 2009 Toyota Corolla and it is making a purring noise?

It sounds like a cat purring. It does it when at an idle and while driving down the road. It is the same speed and pitch no matter what speed the engine is running at. It sounds like it is coming from the engine compartment. The dealer wont do anything because it isn't hurting anything(so they say). its been doing it for along time but its really starting to bug me.
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Old 31 Mar 2014, 11:54 pm   #2 (permalink)
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cause its gonna explode
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Old 01 Apr 2014, 12:09 am   #3 (permalink)
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I would get the transmission checked.
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Old 01 Apr 2014, 12:24 am   #4 (permalink)
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While at the dealer did they take care of the recalls on this model & year of car ?















Did they check your belts,pulley or belt tensioner ? Try using belt dressing to see if that helps.Any auto parts store carries it.















www.carproblemzoo.com















www.motortrend.com
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Old 01 Apr 2014, 12:54 am   #5 (permalink)
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"It does it when at an idle and while driving down the road. It is the same speed and pitch no matter what speed the engine is running at."































so ti's not ratating mass, not a belt/pulley/engine/exhaust/drive train/running gear or any associated parts issue.















not effected by wind.































get a section of hose to listen through. i've used garden, vacuum, even oxy. start engine, careful of ratating mass (which is why one uses a hose). start probing around.































my thoughts,















could be electrical.















check relays in the engine bay. in the black boxes. corroded or weak power supply can cause them to chatter. heard them buzz b4. might sound like a purr.















if it is a relay, and since it only does it when engine is running, you'll have to take stock in the relays you have. buy 'em one at a time, start engine and see what happens. can't go removing some of those relays while the engine is running, so....















simple removal of relays one at a time and spraying the contects with WD-40 and re-installing them might yield some results.































another thought,















does it change when you change speeds on the heater? debris in the heater-a/c basket fan.































all i can think of.















-------















FYI, (not the issue anyway-as the sound does not change with rpms)















belt dressing is a band aide fix. emergency use only. can cause the issue again down the road so to speak. should adjust belt/idler pulley, and or change effected belts. to do it right.















reespect to other replies.
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Old 01 Apr 2014, 01:10 am   #6 (permalink)
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its realizing that it is a pussy car
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