Strange grind, timing chain?

[ninnyGTP]

Trying to figure out this grind I have had ever since yesterday when I overtook some slow car on the highway. It's only during high RMPs as with normal cruising everything is fine. Idle is fine, motor seems to accellerate like normal.



Ignore the SES light in the video, it's due to a bad MAF


I'll be checking my flexplate in the morning to see if it's cracked

 

[rocafella2032]

surpentine belt? sounds like what happened to me.

 

[ninnyGTP]

Nope, belts are perfect. Only about 5k miles on both

 

[rocafella2032]

hmm..mine sounded like that. i had to replace waterpump and surpentine belt

 

[ninnyGTP]

Worth a shot. I can only hope it's something simple like a water pump. Have a spare in my garage haha

 

[rocafella2032]

well good luck..hopefully its not the timing chain

 

[ninnyGTP]

Alright, just ruled out both the pump and the flexplate. Any other ideas? Might have it checked out tomorrow

 

[TorqueAutoMotiv]

well if it is the chain i have one for sale;-)

 

[97gtsc]

Is there a constant noise at xxx rpm or is it brief?
Also try and listen to it under the car when it happens?

 

[blueguy]

Have you removed the supercharger belt and started it to see if it is actually engine related and not the blower?

 

[ninnyGTP]

I'll give the blower a shot in the AM. As far as it being constant, no it's not. It's only around thr 4K range. I haven't seen if it stays all the way to the shift just due to trying not to cause any serious damage, if it so happens to be a big problem

 

[silverstreak]

Harmonic dampener maybe?

 

[ninnyGTP]

That's what i'm thinking it might be. Just confused on why it's not a constant thing?

Anyhow, went ahead and got another vid of it with the supercharger belt off

 

[silverstreak]

That's what i'm thinking it might be. Just confused on why it's not a constant thing?

Anyhow, went ahead and got another vid of it with the supercharger belt off

If the rubber in the dampener goes to crap sometimes it can only be heard at the higher rpm's. I would pull the belts off and run it and see if the noise is still there. Maybe even a bad tensioner pulley. Just guesses?

 

[ninnyGTP]

I'll try anything at this point haha

 

[ninnyGTP]

Nevermind, new plan. Just going to pull the motor and stick in an L32

 

[matt5112]

Thats an expensive alternative...

 

[ninnyGTP]

haha not even. After selling my L67 i'll only be biting about $200 plus another $100 or so for the L32-L67 TB adapter

In my mind, that's an AWESOME alternative.

 

[matt5112]

Also a plus if its been well taken care of and/or low mileage.

 

[Boostd1]

L32 ftw