NEED HELP: Whining noise on cold start up - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
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post #1 of 33 (permalink) Old 10-29-2008, 01:25 PM Thread Starter
 
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Whining noise on cold start up

I have a 2008 xlt 5.4L 4x4 with <1000kms on it. I've noticed twice now that on cold morning start ups there is a whining noise for the first 30 seconds it is running. The noise appears to be coming from under the truck, under the cab. Im assuming it is drivetrain related but Im not to familiar with 4x4 vehicles and transfer cases and all that stuff.

Im sure that if I take it to Ford the truck will not make the noise. Has anyone else noticed this or knows whether it is normal for these vehicles

2008 F150 XLT 5.4L 4x4 w/XTR Package
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post #2 of 33 (permalink) Old 10-29-2008, 01:33 PM
 
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Chuck:are the wheels slightly turned when this happens?have noticed in colder temps the power steering pump will whine.


a moments silence for the shelbyx,i hope her new owner enjoys as much.
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post #3 of 33 (permalink) Old 10-29-2008, 01:41 PM Thread Starter
 
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Nope the wheels are straight. If/when it happens again I will try to pin point where it is coming from.

2008 F150 XLT 5.4L 4x4 w/XTR Package
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post #4 of 33 (permalink) Old 10-29-2008, 01:55 PM
 
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Could it be that your truck is still very new? Maybe after you get 2K on the odo, it will have solved itself...?

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post #5 of 33 (permalink) Old 10-29-2008, 02:00 PM Thread Starter
 
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Quote:
Originally Posted by truckpilot View Post
Could it be that your truck is still very new? Maybe after you get 2K on the odo, it will have solved itself...?
Hopefully you are right. I will watch it for now, I still have lots of warrenty left if need be down the road lol.

2008 F150 XLT 5.4L 4x4 w/XTR Package
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post #6 of 33 (permalink) Old 10-29-2008, 03:26 PM
 
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I had a similar noise on my 03 150 I changed to a lighter engine oil and it went away. Same thing on the ST.

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post #7 of 33 (permalink) Old 10-29-2008, 05:05 PM
 
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define cold, seeing as your in ottawa, and im in mb, im gonna guess were at about the same temp. and the coldest it's gotten here is like -5ish in the morning. So how about there, is it damp in the morning?

I know on my work van if its really damp in the morning the alt will whine for awhile until it dries up, weird i know. It could also be your idler pulley or something along those lines, and it isn't greased properly. The cold acts as a catalyst until the grease warms up, until you pinpoint it it's pretty much a shot in the dark as to making guesses here.

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post #8 of 33 (permalink) Old 10-29-2008, 05:28 PM Thread Starter
 
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Temp wise it is around 0* in the morning. It really hasnt been damp when I noticed it. The noise sounds like it is more coming from under the truck like the drive shaft but I could easily be wrong.

2008 F150 XLT 5.4L 4x4 w/XTR Package
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post #9 of 33 (permalink) Old 10-29-2008, 05:34 PM
 
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ok, well let's put it this way, you say it's only for about 30 seconds during startup right?

If the truck is in park, the driveshaft is not spinning, so it rules out that, also, a driveshaft with a noise will sound different depending on how fast you are going, so im 99% sure there issue here doesn't have to do with the drive shaft.

I suggest putting on the parking break, crawling under the truck, then have a family member/friend start it while your there, and then as quickly as possible try to find out where it's coming from.

"The Dark Knight"
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post #10 of 33 (permalink) Old 10-29-2008, 06:05 PM
 
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I would consider looking at the Belt maybe a pulley. is it a whine or a squeal


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