Squeaking noise when starting engine

[jpmiami]

Hey fellas, 

I have a 2014 with the 5.3 engine with around 80k miles and every time i start the engine it makes a squeaking noise either Hot or Cold. Sounds like belts but changed them all, lube them and still there?

Anyone with this issue?

 

Thanks. 

[Sierra Dan]

4 minutes ago, jpmiami said:

Hey fellas, 

I have a 2014 with the 5.3 engine with around 80k miles and every time i start the engine it makes a squeaking noise either Hot or Cold. Sounds like belts but changed them all, lube them and still there?

Anyone with this issue?

 

Thanks. 

I had this issue with my '14 Sierra.

Thought it was the starter, but I found the flapper valve in the exhaust was the culprit.

It was worse and louder when warm.  Tried lubricating but no luck, so I just clamped it open.

Try clamping your exhaust flapper valve open, start up and see if that works.

Aside from that could be your starter or a belt etc, but my gut says you have same issue I had.

[jpmiami]

Just clamped it open, engine start squeaking still there but v4 to v8 squeaking gone.. Belts got checked so guess look at starter. 

[Sierra Dan]

Yeah, my clamping also eliminated the V4 to V8 squeak.

Darn, I was hoping to save you money!  LOL

[Supreme Pizza]

Defective belt tensioner? 

[Darmichar]

2 hours ago, starman8tdc said:

Defective belt tensioner? 

Came here to say that.  Pretty sure if you take the tension off and spin it by hand it will feel pretty 'rough' or tight.

[Supreme Pizza]

What? 

 

    I'm not talking about the pulley bearings on the tensioner, i'm talking about a loose or worn out tensioner spring, which would reduce the tension on the belt, resulting in a squeal. But yes, it could be the pulley bearing too I guess. 

[Sierra Dan]

Could also be the Vacuum Pump or belt.

[jpmiami]

4 hours ago, Sierra Dan said:

Yeah, my clamping also eliminated the V4 to V8 squeak.

Darn, I was hoping to save you money!  LOL

That never happens but thats for the tip!

[jpmiami]

26 minutes ago, starman8tdc said:

What? 

 

    I'm not talking about the pulley bearings on the tensioner, i'm talking about a loose or worn out tensioner spring, which would reduce the tension on the belt, resulting in a squeal. But yes, it could be the pulley bearing too I guess. 

I will look at that tomorrow.

[Sierra Dan]

Can you take a vid or post a soundclip and we might further be able to help?

[jpmiami]

1 minute ago, Sierra Dan said:

Can you take a vid or post a soundclip and we might further be able to help?

For sure, ill post one up tomorrow.

[Sierra Dan]

Sounds good.

[jpmiami]

13 hours ago, Sierra Dan said:

Sounds good.

GM, Here you go. Does it every time it starts, new serpentine belt and belt lube on the other two and nothing. 

IMG_8250.mov

[Sierra Dan]

Well, to me it sounds like your battery is weak....  seems like a slight hesitation on start like it is not getting the CC Amps it needs.

This could be causing stress on your belt? Sounds like the belt to me.

Definitely from the engine/front engine area.

Do you have a warranty?