Burning plastic smell and muted whine sound under the hood

[404NotFound]

Ex father in law thinks serpentine belt and dad thinks alternator is going. Any other ideas? Lol

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[Warwicke36]

Probably belt related... does the sound change with RPMs? It could b the belt itself, or any of the pulleys not spinning freely as well (that includes the alterantor, I have had a few lock up on my fleet vehicles, however that will smoke a belt off in a matter of seconds)

Make sure yhou tensioner is still tensioning properly and isn't stuck.

The belt isn't too bad to replace. Pull the skid plate/splash guard and do it from the botttom. With the belt off spin everything by hand and make sure it spins freely.

Another cluprit can be the clutch on the A/C compressor starting to go. As it wears out it cant fully enagage so it will slip and make noise and could potentially cause a smell as well. This would only happen with the AC engaged.

 

[404NotFound]

Probably belt related... does the sound change with RPMs? It could b the belt itself, or any of the pulleys not spinning freely as well (that includes the alterantor, I have had a few lock up on my fleet vehicles, however that will smoke a belt off in a matter of seconds)

Make sure yhou tensioner is still tensioning properly and isn't stuck.

The belt isn't too bad to replace. Pull the skid plate/splash guard and do it from the botttom. With the belt off spin everything by hand and make sure it spins freely.

Another cluprit can be the clutch on the A/C compressor starting to go. As it wears out it cant fully enagage so it will slip and make noise and could potentially cause a smell as well. This would only happen with the AC engaged.

I think it's a belt or alternator. Still happens with AC off and I noticed just now it was more difficult to turn over, which makes me think my battery isn't getting a great charge.

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[prybar]

I think it's a belt or alternator. Still happens with AC off and I noticed just now it was more difficult to turn over, which makes me think my battery isn't getting a great charge.

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Hey, did you ever figure this out? I'm getting the exact same symptoms this morning.

 

[elshep]

uh oh! my first thought is tat something has been spilt or splashed on the exhaust manifold...

 

[prybar]

Man, people need to close out their threads when they figure out the issue!

In my case it ended up being the alternator. Hope this helps someone in the future.