Weird sound during cold starts, very concerned.

[ObscureGlock]

Hey guys! Hoping I can get some help on this...my truck out of nowhere started making this horrifying noise on startup, primarily during cold starts. I’m very concerned.

 

 

[Loco-diablo]

There was a thread on this a few weeks back. I have the same sound in extreme cold.

 

 

 

 

[jrob56]

Odd noise but sounds tinny and external to me(Disclaimer videos online are really hard to tell). Id get under the truck and have some else start it and track it down(Another disclaimer, parking brake and someone you trust)

[lapoolboy]

Sounds like heat shield rattle/resonance to me.  Mine does the exact same thing.

[ObscureGlock]

14 hours ago, lapoolboy said:

Sounds like heat shield rattle/resonance to me.  Mine does the exact same thing.

It only does it on cold starts though, I'd think a heat shield would rattle every start.

[juscuzram]

I was trying to be like the cool people the other day and make a cold start video, and mine made that same noise. Never heard it before, although I'm usually in the truck when I start it. My starter sounds a little squeaky too I noticed. (not sure why the video uploaded upside down) https://i.imgur.com/Bfra5nv.mp4

[Obscenejesster]

It's the bendix drive not disengaging quick enough. It shouldn't cause any issues. All of them do this to some extent.

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[ObscureGlock]

On 1/11/2018 at 11:33 AM, Obscenejesster said:

It's the bendix drive not disengaging quick enough. It shouldn't cause any issues. All of them do this to some extent.

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Now, why does this happen only on cold starts? And is there any fix to it?

[Obscenejesster]

Now, why does this happen only on cold starts? And is there any fix to it?

It only happens on cold starts when the outside temp is below 50° or so.

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[ObscureGlock]

Just now, Obscenejesster said:

It only happens on cold starts when the outside temp is below 50° or so.

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Hm that’s weird. Over here, it happened between 45 and 75 degrees, as I found out this morning. The temp was 75 and it made the noise. I’m getting frustrated, this noise is concerning and embarrassing.

[Obscenejesster]

Hm that’s weird. Over here, it happened between 45 and 75 degrees, as I found out this morning. The temp was 75 and it made the noise. I’m getting frustrated, this noise is concerning and embarrassing.

Hmm. That's odd. Listening to your video again, it does sound louder and higher pitched than it normally does.

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[ObscureGlock]

1 hour ago, Obscenejesster said:

Hmm. That's odd. Listening to your video again, it does sound louder and higher pitched than it normally does.

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Yeah, that’s why I’m really trying to find out more about this and see if it’s an isolated problem, or others have it. I have recorded 2 videos from this morning. If you’d like me to upload them to YouTube and share the links, let me know, I’d me more than willing to do so.