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post #1 of 17 (permalink) Old 02-06-2007, 10:23 AM Thread Starter
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cold start noise

Anybody live in the northern US right now with the below zero temps? I am having an issue with my 2.7L SE 2001 Trep. Each morning, I go out to start the car, and it starts up fine, but then it revs up and has a whine that sounds like a horse, then it settles out to a nice purr. Im nervous that the fridgid temps are making the oil thick and heavy and the moving parts are not getting enough lube so they grind? Tell me what you all think. I can't pinpoint the noise.
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post #2 of 17 (permalink) Old 02-06-2007, 11:23 AM
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I'm in the freezing cold here in northern Oh. Started the car yesterday afternoon after sitting out for 2 days without being started. I got the increased throttle then back down to the proper idle. Also heard the whine and ticking. She is just cold and trying to move the oil around.
I noticed my tranny was slower to shift so I drove like a granny down my street until it warmed up a little.
Just make sure your oil is clean and at the full mark for both the tranny and engine oil and you should be ok.

Winter sucks for people and cars! :mad:

Think spring,
GB49
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post #3 of 17 (permalink) Old 02-06-2007, 02:39 PM
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I've got a '98 ES 3.2L and have been having the same noise, usually only when the temperature is around 0 F or below. Yesterday morning it was -20 F outside (warmer than that in my garage, probably 0 F to 5 F) and it made the sound, but not very loud. When I started it to go home from work it was -4 F and the sound was pretty loud.

I've had other cars make similar noises. Since it only happens when it is really cold and goes away quickly, I'm not too concerned about it.
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post #4 of 17 (permalink) Old 02-06-2007, 02:51 PM
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yesterday with the windchill it was - 35C in the morning and my trep started just fine.

The last time it squealed like a piglet was on that day when it was facing into the wind all day and freezing rain had fallen. The icy coating had covered the serp bell and a/c belt and made a fine whine until very warm.

Now she just fires up right smart and takes a LONG time to warm up


oh -40 C is the same as - 40F but the gradiation is diffrent my water freezes at 0C
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post #5 of 17 (permalink) Old 02-06-2007, 03:00 PM
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Wind chill does not effect cars.
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post #6 of 17 (permalink) Old 02-06-2007, 04:42 PM
 
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Quote:
Originally Posted by jloyva
Wind chill does not effect cars.


and that would be why? Wind chill will cause water to freeze, why wouldn't it affect cars?

Anyway, many cold weather whines are usually caused by belts and/or idler/tensioner pulleys. I have 2 new belts and one new idler pulley I did back in July and I have about a 10 second whine when it gets really cold here. I suspect its my alternator idler, since its the one I didn't change yet.
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post #7 of 17 (permalink) Old 02-06-2007, 05:18 PM
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Quote:
Originally Posted by froggy81500


and that would be why? Wind chill will cause water to freeze, why wouldn't it affect cars?
http://en.wikipedia.org/wiki/Wind_chill


Humans produce heat, cars don't (assuming the car is not running).

If both are outside (in the cold), the human will keep a body temperature higher than the ambient air. The car will slowly cool until it is the same temperature as the air surrounding it.

Wind chill makes us "feel" colder than the air around us because of the following thermodynamic principle: The greater the temperature differential between two mediums, the greater the rate of heat flow there is between them.

Let's assume no wind chill factor: We are at ~100 degrees and let's assume the air is at 10. As heat begins to flow out of us, the air immediately around us is warmed...let's say it's now 11 degrees. We can assume our body temperature remains the same as we're always producing heat. Since the air has warmed the temperature differential lessens, and the rate of heat transfer becomes less.

Add wind chill. The wind constantly circulates the surrounding air keeping it at a steady 10 degrees. The rate of heat transfer is allowed to stay at it's maximum given the situation, so more heat out per unit time = we "feel" colder. This is why it's often called the "feels like" temperature. The temperature outside is the same...but there's more heat flowing out of the body per unit time.

Cars are different from humans. As I stated, they don't produce heat. As such, their temperature declines until they match the outside air temperature. At this point, the temperature differential between the car and the air is 0. Heat transfer stops. The car cannot get any colder than the surrounding air.


Conclusion: Wind chill affects rate of heat TRANSFER. It has no bearing on the actual final temperature of any object or system. Wind chill will make it cool down faster, but its final temperature is the same with or without wind.





EDIT: Oh, and wind chill does not cause water to freeze, for reasons stated above.

Last edited by 95LHS; 02-06-2007 at 05:23 PM.
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post #8 of 17 (permalink) Old 02-06-2007, 05:29 PM
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My Intrepid is garage kept. In the morning I have some noises but goes away really fast. My Impala and TrailBlazer make noises, just because they are outside. I recommend Marvel for this time of year to clean out all of the oil system.
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post #9 of 17 (permalink) Old 02-06-2007, 06:02 PM
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the factory service manual says , at temps near or below zero F, it is normal for the power steering pump to make noise, but only for about a minute or less. It could be this is what most of you are hearing.
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post #10 of 17 (permalink) Old 02-06-2007, 06:07 PM
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Its -30 to -40 the past few days with -50 wind chills so HA!...wait, Im the one in the shitty weather Anyhow its most likely your power steering. Mine wails like a banshee till it warms up.
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post #11 of 17 (permalink) Old 02-06-2007, 06:13 PM
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Wind chill will not make a car get any colder than actual air temp. A car out in the wind will cool down to actual air temp much faster than a car kept out of the wind. The evaporation of moisture from your skin is what makes your skin get colder. Without wind your skin with the help of body hair can keep a warm cushion of air around your skin.
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post #12 of 17 (permalink) Old 02-06-2007, 06:22 PM
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A health lesson??? lol
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post #13 of 17 (permalink) Old 02-06-2007, 10:22 PM
 
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If you have a pre-2002 car, one thing that will really quiet a PS pump down in the cold is to replace the conventional fluid with ATF+4. DCX spec'd ATF+4 for the PS system from 2002+ without any changes to the rest of the system. It is thought that it is ok to flush and replace the fluid in older systems to reduce noise, etc, etc.

This takes quite a bit of time and patience and more than a few qts of the ATF+4. Be prepared for a mess in the driveway. It seems that no matter how careful you are with ATF it always spills....
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post #14 of 17 (permalink) Old 02-07-2007, 08:17 AM
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Quote:
Originally Posted by jedgxe
the factory service manual says , at temps near or below zero F, it is normal for the power steering pump to make noise, but only for about a minute or less. It could be this is what most of you are hearing.
Quote:
Originally Posted by LH_Chris
...Anyhow its most likely your power steering. Mine wails like a banshee till it warms up.
I suspected the power steering pump may have been the culprit, so this morning when I started it up I turned the wheel right away and the noise became louder, confirming my suspicion.
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post #15 of 17 (permalink) Old 02-12-2007, 03:14 PM
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I have the same problem

It usually happens when I don't use the car for more than 1 day. And also it has to be cold outside. The sound is similar to grinding metal I think. I'm assuming that the oil sinks to the bottom when the engine is off and takes awhile to circulate upon startup. I know it's terrible to start your engine like this, but what choice do I have? I'm already using Mobil 1 extended 15K performance.


Also, is this an old wives tale:

Before really cold starts, I turn the key halfway (enough for the instrument lights to light up but before starter kicks in). I repeat this 2-3 times before turning it all the way for the start. I heard that this injects oil into the engine right before the engine starts up. Is this true?
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