I think my engine is dying... Rattle Tapping noise.
Thread Starter
Senior Member
Joined: Dec 2014
Posts: 448
Likes: 3
From: CALIFORNIA, UNITED STATES
2003 S430, 2014 E350
I think my engine is dying... Rattle Tapping noise.
Help,
I have here a S430 that is rattling quite loudly. The rattle or tapping noise is coming from the bottom rear of the engine. When you pop the hood and stand at the cooling fan, you barely hear it. Rattles the most when at 1350 rpm. It doesn't matter if it's hot or cold. What could this be? Car has 146k miles.
BTW, real sorry for the vertical video...
https://www.youtube.com/watch?v=KeB4...ature=youtu.be
I have here a S430 that is rattling quite loudly. The rattle or tapping noise is coming from the bottom rear of the engine. When you pop the hood and stand at the cooling fan, you barely hear it. Rattles the most when at 1350 rpm. It doesn't matter if it's hot or cold. What could this be? Car has 146k miles.
BTW, real sorry for the vertical video...
https://www.youtube.com/watch?v=KeB4...ature=youtu.be
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,012
From: Miami, FL
2003 CL 600
Could be engine, could be transmission front pump noise. No real good way of testing the difference without having the car on a lift running and checking for the location.
It does have good oil in it and the correct amount, right?
It does have good oil in it and the correct amount, right?
Thread Starter
Senior Member
Joined: Dec 2014
Posts: 448
Likes: 3
From: CALIFORNIA, UNITED STATES
2003 S430, 2014 E350
Transmission front pump? I had a shifter module go bad a couple month back. Caused me to drive the car in 2nd gear and neutral for quite a bit of miles. The 2nd gear clutch plates must have some wear on them, but would that cause the problem?
I've taken good care of the engine. 5-6k mile oil changes with Formula M. (Mobil Dealer Oil, basically 5w-40) Yes the level is correct. It is right up to the MAX line. Which isn't ideal, but it's not overfilled.
EDIT: Also, I haven't lost power either. The pull feels the same as a year ago.
I've taken good care of the engine. 5-6k mile oil changes with Formula M. (Mobil Dealer Oil, basically 5w-40) Yes the level is correct. It is right up to the MAX line. Which isn't ideal, but it's not overfilled.
EDIT: Also, I haven't lost power either. The pull feels the same as a year ago.
Last edited by cybertronicify; Apr 7, 2017 at 11:16 PM.
Super Member
Joined: Oct 2012
Posts: 538
Likes: 89
From: Hollywood, CA
W209, W124
"Caused me to drive the car in 2nd gear and neutral for quite a bit of miles."
It's called "limp home mode" for a reason. Not meant to be used until you get around to pulling into an AAMCO.
No more delays, get a mechanic to listen. Sounds pretty awful to me.
Or just drive around and wait for a rod to come poking out the side of the block.
It's called "limp home mode" for a reason. Not meant to be used until you get around to pulling into an AAMCO.
No more delays, get a mechanic to listen. Sounds pretty awful to me.
Or just drive around and wait for a rod to come poking out the side of the block.
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Super Member
Joined: Oct 2011
Posts: 933
Likes: 25
2004 CLK 500
My 08 S550 did that exact same noise was the exhaust hanger.. doubt very much that's the engine but I agree you need to get these things checked out right away. It's stupid to drive with issues like this or in limp mode.. especially with a car like this..
Super Member
Joined: Oct 2011
Posts: 933
Likes: 25
2004 CLK 500
Member
Joined: Aug 2015
Posts: 87
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From: Norton, Massachusetts
Mine 2005 S430 4Matic * Wife's 2005 S430 4Matic *
Through time, if left unchecked (not repaired) the catalyst honeycomb will eventually restrict the air flow through the exhaust and when completely plugged, it will create too much back-pressure and then cause misfires on that bank of cylinders along with the error codes to go along with it.
