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whistling under load

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Old 10-11-12, 03:20 PM   #1
jcat_350
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Default whistling under load

I've been noticing this and was curious if anyone else has the same thing.

When accelerating usually from a stop and more noticeable when cold, I hear a whistling that seems to correspond to engine speed. If the engine isn't under load, i.e. idling or cruising, I don't hear it. It seems to be coming from the front driver's side somewhere, I haven't had a chance to get under the hood and see if there's a leaky coupler in the airbox or something to that effect.

Doesn't affect driveability, just kinda odd.
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Old 10-11-12, 09:08 PM   #2
chefchoy
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Not an expert, but I would be thinking a pulley on something.........That would be my first guess. I wouldn't imagine that you would be hearing intake noise to the tune of a whistle on a naturally aspirated car......especially on the ES being as quiet of a cabin as it has a reputation of having.......but again, not an expert.
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Old 10-12-12, 07:50 AM   #3
jcat_350
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Quote:
Originally Posted by chefchoy View Post
Not an expert, but I would be thinking a pulley on something.........That would be my first guess. I wouldn't imagine that you would be hearing intake noise to the tune of a whistle on a naturally aspirated car......especially on the ES being as quiet of a cabin as it has a reputation of having.......but again, not an expert.
nah pulleys wouldn't whistle I don't think. It's got a quiet cabin, but I can still hear engine noise pretty good for the most part. It's either air related or electronic...seems to only come in around 2k-2500rpms.
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Old 10-15-12, 10:37 PM   #4
LEXUS951
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I noticed this also in my 08 only when engine is cold once it's to its operating temp the noise goes away? I want to know what it is also


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Old 11-16-12, 11:27 AM   #5
jcat_350
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My car went in for a coil and 6 plugs, which required removing the intake manifold. I noticed that now, after that was done, I don't have the whistle anymore. I'd say that since it goes away at temp, that's the metal and plastic expanding and sealing a leak at the base of the intake manifold. Pull it and either get a new gasket or seal it with silicone gasket maker. Also check your intake pipes from the airbox back to make sure they're not leaking.
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07, 200, 2007, accelarate, cold, front, is250, lexus, loud, rx350, wheel, whistle, whistles, whistling

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