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RH77 · 11-21-2009, 01:27 AM

Here's a fun and not necessarily urgent puzzle...

Teggy's pushing 150K miles with over 11 years of operation so it's understandable that things tend to wear...

When the weather first turned cold this Fall, there was a continuous whine/growl after startup until normal operating temps -- then it went away. It seemed to be coming from the driver's side of the engine compartment.

So, necessity mandated re-installation of power steering after an injury (it's no big deal, but I need PS for a while).

Now, despite the temps -- 35F to 65F ambient, there's a whine between 2200 and 2700 RPM. It's transmission independent (happens in Neutral and while stopped and/or in Park).

The sound can be best described as a distant jet engine at low speeds, similar to when a plane is taxiing (low turbine speed, but still that whine).

It sounds like a classic worn transmission sound. Any RPM outside of the range -- there's no sound. It's louder when the engine compartment is cold.

First Guess: Water Pump. Last replaced with the timing belt, accessory belts, and idler pulley at 80K miles. It's getting close to scheduled replacement, but not quite a concern.

Any other guess is with the pulleys, belts, and pumps.

It could be nothing, but it's interesting to diagnose. I suppose EcoModders get to know their cars a bit too well

RH77

11-21-2009, 01:27 AM	#1 (permalink)
RH77 Depends on the Day Join Date: Nov 2007 Location: Kansas City Area Posts: 1,761 Teggy - '98 Acura Integra LS Sports Cars 90 day: 32.74 mpg (US) IMA - '10 Honda Insight EX Team Honda 90 day: 34.76 mpg (US) Tessie - '06 Acura TSX Base 90 day: 28.2 mpg (US) Thanks: 31 Thanked 41 Times in 35 Posts	Name That Sound Here's a fun and not necessarily urgent puzzle... Teggy's pushing 150K miles with over 11 years of operation so it's understandable that things tend to wear... When the weather first turned cold this Fall, there was a continuous whine/growl after startup until normal operating temps -- then it went away. It seemed to be coming from the driver's side of the engine compartment. So, necessity mandated re-installation of power steering after an injury (it's no big deal, but I need PS for a while). Now, despite the temps -- 35F to 65F ambient, there's a whine between 2200 and 2700 RPM. It's transmission independent (happens in Neutral and while stopped and/or in Park). The sound can be best described as a distant jet engine at low speeds, similar to when a plane is taxiing (low turbine speed, but still that whine). It sounds like a classic worn transmission sound. Any RPM outside of the range -- there's no sound. It's louder when the engine compartment is cold. First Guess: Water Pump. Last replaced with the timing belt, accessory belts, and idler pulley at 80K miles. It's getting close to scheduled replacement, but not quite a concern. Any other guess is with the pulleys, belts, and pumps. It could be nothing, but it's interesting to diagnose. I suppose EcoModders get to know their cars a bit too well RH77 __________________ *“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein* _ _