[fuddy]

Hopefully the video can help... engine at idle.

08 SC, 130k miles on the clock... I'm hoping it's the waterpump because that's where the noise seems to come from, although if it was the waterpump wouldn't it be leaking?

From what I can tell with the service history, waterpump is original, timing chain guides have never been done.

TIA!

 

[RRToadHall]

Don't discount the idler pulley bearing right next to it. use a dowel or long screw driver as a stethoscope and narrow it down. As far as the water pump leaking... only if the front bearing were shot and it were oscillating and breaking the seal.

 

[fuddy]

Don't discount the idler pulley bearing right next to it. use a dowel or long screw driver as a stethoscope and narrow it down. As far as the water pump leaking... only if the front bearing were shot and it were oscillating and breaking the seal.

I plan on replacing all the pulleys when I do the belts, which is sooner rather than later now. Hopefully that'll be it.

 

[MI2VA]

Not sure of the 4.2 is same as 4.4, bit my 4.4 was involved to swap out the serpentine belt with it running through the fan pulley tower. But now is the the best time to do the serp belt while you are doing the pulleys.

 

[Rovercharged]

That is one deep on-its-way-out bearing sound. You can also remove both belts and turn each pulley by hand even the supercharger pulley to rule things out before spending any $$$. Very crunchy bearing sound - Best of luck!

 

[fuddy]

Had time to take things apart today, it is the waterpump, same noise when turned by hand. Luckily it didn't start leaking or fail. I already received all the belts, tensioners, and pulleys, now to order a thermostat and pump.

 

[fuddy]

For those wondering how to do this:

https://megashare.megahd.com.br/d653372a49ffbf11bdc7ee2435af0eea

https://megashare.megahd.com.br/13999d896569c54e2ece81663c755aa6

https://megashare.megahd.com.br/4baf130a66311bb6d27c45857b2065e7

https://megashare.megahd.com.br/c61f4a131f81859167a5b7368dad352d

 

[fuddy]

Finally done, Parts bill: $353.89 Replaced every single pulley, both belts, water pump and thermostat. She should be good to go for another 100k She sounds so quiet now

 

[lrrystringer80]

Hopefully the video can help... engine at idle.

08 SC, 130k miles on the clock... I'm hoping it's the waterpump because that's where the noise seems to come from, although if it was the waterpump wouldn't it be leaking?

From what I can tell with the service history, waterpump is original, timing chain guides have never been done.

TIA!

Water pump!!

 

[Googs]

Water pump!!

He has a new motor now 'ol mate the last one blew! old thread.

 

[lrrystringer80]

He has a new motor now 'ol mate the last one blew! old thread.

😆😆 Ok

 

[fuddy]

He has a new motor now 'ol mate the last one blew! old thread.

nah, the l320 I sold to my brother and is still going strong. The motor blew on my L494 😬