Chirp
Thread Starter
Super Member
Joined: Jan 2009
Posts: 566
Likes: 261
From: In The Woods
2019 W222 S560 4Matic/2025 Yukon Denali
Chirp
My 2019 S560 4 Matty is at 90k miles.
At 47k miles I did all the underside fluids, plugs, etc, pulleys.
Now I get a chirp sound on start up, and then it its quiet when the car is warm.
Sounds like a water pump.
My question is, do the water pumps on these cars make the chirp sound?
Im not getting any overheats, etc. just the sound.
The plan is to open her back up at 100k, do the plugs, trans/ diffs/ transfer case/ water pump/ aux water pump, coolant flush as well (might as well) and the idler pulley tensioner.
Is 90k a good life for the water pumps in these cars?
Anything else you would look for at 100k to help make this car go to 200K?
At 47k miles I did all the underside fluids, plugs, etc, pulleys.
Now I get a chirp sound on start up, and then it its quiet when the car is warm.
Sounds like a water pump.
My question is, do the water pumps on these cars make the chirp sound?
Im not getting any overheats, etc. just the sound.
The plan is to open her back up at 100k, do the plugs, trans/ diffs/ transfer case/ water pump/ aux water pump, coolant flush as well (might as well) and the idler pulley tensioner.
Is 90k a good life for the water pumps in these cars?
Anything else you would look for at 100k to help make this car go to 200K?
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,641
Likes: 1,224
From: Phoenix
222 S-65
The water pump bearing has to be nearing the end of it’s life. If any of the idlers/SERP belt tensioner have not been done it is time.
Usually a chirp is a belt slipping. My 275 powered S-65 made a chirp that ended up being the front main bearing spinning in its bore. Sounded just like a belt and was intermittent.... until it spat a bearing shell into the chains. To the driver this was not amusing.
Usually a chirp is a belt slipping. My 275 powered S-65 made a chirp that ended up being the front main bearing spinning in its bore. Sounded just like a belt and was intermittent.... until it spat a bearing shell into the chains. To the driver this was not amusing.
Last edited by JohnLane; Dec 16, 2024 at 12:24 AM.
Thread Starter
Super Member
Joined: Jan 2009
Posts: 566
Likes: 261
From: In The Woods
2019 W222 S560 4Matic/2025 Yukon Denali
The water pump bearing has to be nearing the end of it’s life. If any of the idlers/SERP belt tensioner have not been done it is time.
Usually a chirp is a belt slipping. My 275 powered S-65 made a chirp that ended up being the front main bearing spinning in its bore. Sounded just like a belt and was intermittent.... until it spat a bearing shell into the chains. To the driver this was not amusing.
Usually a chirp is a belt slipping. My 275 powered S-65 made a chirp that ended up being the front main bearing spinning in its bore. Sounded just like a belt and was intermittent.... until it spat a bearing shell into the chains. To the driver this was not amusing.
So on this car the main bearing for crankshaft is discontinued for this car.
I do see a few different bearings for the car, mainly the one that I am thinking is the idler gear bearing, looks to be 2 of them.
I did pulleys and new belt at 50k, but not tensioner.
Also, are the oil seperators 'cleanable' or do I have to replace them as well? Was wondering if I can just clean them out.
Last edited by vinflouen; Dec 16, 2024 at 12:51 AM.
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,641
Likes: 1,224
From: Phoenix
222 S-65
Likelihood of your engine having a main bearing failure as I had in my 275 is akin to a lottery win.
Plan on doing the tensioner. Listen to the water pump at idle with a long screwdriver applied next to it. You will hear a bearing that is failing.
40,000 miles on the idler bearings is long enough to replace them. Better 10,000 miles early than on the side of the road.
I would replace the water pump as preventative maintenance.
Get new oil separators. Not expensive and good practice.
Plan on doing the tensioner. Listen to the water pump at idle with a long screwdriver applied next to it. You will hear a bearing that is failing.
40,000 miles on the idler bearings is long enough to replace them. Better 10,000 miles early than on the side of the road.
I would replace the water pump as preventative maintenance.
Get new oil separators. Not expensive and good practice.
Thread Starter
Super Member
Joined: Jan 2009
Posts: 566
Likes: 261
From: In The Woods
2019 W222 S560 4Matic/2025 Yukon Denali
Likelihood of your engine having a main bearing failure as I had in my 275 is akin to a lottery win.
Plan on doing the tensioner. Listen to the water pump at idle with a long screwdriver applied next to it. You will hear a bearing that is failing.
40,000 miles on the idler bearings is long enough to replace them. Better 10,000 miles early than on the side of the road.
I would replace the water pump as preventative maintenance.
Get new oil separators. Not expensive and good practice.
Plan on doing the tensioner. Listen to the water pump at idle with a long screwdriver applied next to it. You will hear a bearing that is failing.
40,000 miles on the idler bearings is long enough to replace them. Better 10,000 miles early than on the side of the road.
I would replace the water pump as preventative maintenance.
Get new oil separators. Not expensive and good practice.
