Warranty almost up... please help...
Thread Starter
Newbie
Joined: Apr 2019
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2002 c240
Warranty almost up... please help...
I have a 2010 E350 with approx 68k miles. I am getting a ticking/knocking noise is how I can beat explain it after I start it up and the rpm's kick down. My ext Warranty is very close to being up and I just got the call back from the dealer that they are not finding a problem and are not hearing the noise.
Super Member
Joined: May 2018
Posts: 505
Likes: 288
From: Sammamish, WA
2011 E350 Wagon, 2010 GL450
Is it the same sound as in these videos?
I have it coming from the passenger side cylinder closest to the front of the car and it only happens at idle. From what I've deduced, it's an oiling issue with one of the lifters there, but I don't know what the fix is short of an engine/head teardown. I came across numerous reports but no resolution. The good news is I also didn't see a report of any failures caused by this, though I have to assume it'll be an issue at some point.
Regardless, when you bring it to the dealer, ask to talk to a mechanic. Have him stand next to you, put your ear under the hood and say "that noise". A number of times I've brought my car into the shop for some noise or another and they come back and say they can't find it. Stand with them in front of the open hood, and bingo: "oh that noise". Most are not bad guys, they're probably just used to listening for far more egregious sounds.
Edit: this was a good resource on the sound from the videos:
https://mbworld.org/forums/e-class-w...-knocking.html
I have it coming from the passenger side cylinder closest to the front of the car and it only happens at idle. From what I've deduced, it's an oiling issue with one of the lifters there, but I don't know what the fix is short of an engine/head teardown. I came across numerous reports but no resolution. The good news is I also didn't see a report of any failures caused by this, though I have to assume it'll be an issue at some point.
Regardless, when you bring it to the dealer, ask to talk to a mechanic. Have him stand next to you, put your ear under the hood and say "that noise". A number of times I've brought my car into the shop for some noise or another and they come back and say they can't find it. Stand with them in front of the open hood, and bingo: "oh that noise". Most are not bad guys, they're probably just used to listening for far more egregious sounds.
Edit: this was a good resource on the sound from the videos:
https://mbworld.org/forums/e-class-w...-knocking.html
Last edited by atraudes; Sep 13, 2019 at 06:06 PM.
Super Member
Joined: May 2018
Posts: 505
Likes: 288
From: Sammamish, WA
2011 E350 Wagon, 2010 GL450
See if you can pinpoint where the noise is coming from. The purge valve on our engines makes a loud tick too, but is "normal"
https://mbworld.org/forums/e-class-w...m-up-idle.html
https://mbworld.org/forums/e-class-w...m-up-idle.html
Thread Starter
Newbie
Joined: Apr 2019
Posts: 8
Likes: 0
2002 c240
Is it the same sound as in these videos?
https://www.youtube.com/watch?v=iekf8109w1E
https://www.youtube.com/watch?v=9zqXhxud53s
I have it coming from the passenger side cylinder closest to the front of the car and it only happens at idle. From what I've deduced, it's an oiling issue with one of the lifters there, but I don't know what the fix is short of an engine/head teardown. I came across numerous reports but no resolution. The good news is I also didn't see a report of any failures caused by this, though I have to assume it'll be an issue at some point.
Regardless, when you bring it to the dealer, ask to talk to a mechanic. Have him stand next to you, put your ear under the hood and say "that noise". A number of times I've brought my car into the shop for some noise or another and they come back and say they can't find it. Stand with them in front of the open hood, and bingo: "oh that noise". Most are not bad guys, they're probably just used to listening for far more egregious sounds.
Edit: this was a good resource on the sound from the videos:
https://mbworld.org/forums/e-class-w...-knocking.html
https://www.youtube.com/watch?v=iekf8109w1E
https://www.youtube.com/watch?v=9zqXhxud53s
I have it coming from the passenger side cylinder closest to the front of the car and it only happens at idle. From what I've deduced, it's an oiling issue with one of the lifters there, but I don't know what the fix is short of an engine/head teardown. I came across numerous reports but no resolution. The good news is I also didn't see a report of any failures caused by this, though I have to assume it'll be an issue at some point.
Regardless, when you bring it to the dealer, ask to talk to a mechanic. Have him stand next to you, put your ear under the hood and say "that noise". A number of times I've brought my car into the shop for some noise or another and they come back and say they can't find it. Stand with them in front of the open hood, and bingo: "oh that noise". Most are not bad guys, they're probably just used to listening for far more egregious sounds.
Edit: this was a good resource on the sound from the videos:
https://mbworld.org/forums/e-class-w...-knocking.html
Thread Starter
Newbie
Joined: Apr 2019
Posts: 8
Likes: 0
2002 c240
Ok so the dealership is saying that it's "most likely the carbon build up that they found and that a "Pressurized Fuel System Cleaning" and me doing an Additive treatment for 4-5 tanks of gas after that they do that "should clear it up". Which they are quoting me $655 to do. And of course they found my motor mounts and trans mount are worn and need to be replaced... which is another $1300. Also they are saying that the initial diagnostic is extra even ifI get the work done there...? Does this all sound legit?
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Thread Starter
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Joined: Apr 2019
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2002 c240
k so the dealership is saying that it's "most likely the carbon build up that they found and that a "Pressurized Fuel System Cleaning" and me doing an Additive treatment for 4-5 tanks of gas after that they do that "should clear it up". Which they are quoting me $655 to do. And of course they found my motor mounts and trans mount are worn and need to be replaced... which is another $1300. Also they are saying that the initial diagnostic is extra even ifI get the work done there...? Does this all sound legit?
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Super Member
Joined: May 2018
Posts: 505
Likes: 288
From: Sammamish, WA
2011 E350 Wagon, 2010 GL450
Sorry I didn't respond earlier! Somehow I missed your reply. I was just checking in to see what the outcome was.
According to a couple of sources I found on Google it's possible the knock is because of the carbon buildup, but I have to admit, I don't completely understand why. It has, however, inspired me to run Seafoam through a vacuum hose tomorrow. It worked well on the car I had before last so I'm fairly convinced that while it may not fix the issue, it'll be a good thing to do anyway. I'll report back on how it goes.
If you haven't already acted, I would see how confident they are that carbon buildup is the culprit. Did they run a borescope down the spark plug hole and observe excessive carbon buildup in that cylinder, or is it an assertion based on what they heard? If they laid their eyes on it, I'd say give the cleaning a try. Getting a second or third opinion at another dealer or indy would be an excellent idea, regardless.
According to a couple of sources I found on Google it's possible the knock is because of the carbon buildup, but I have to admit, I don't completely understand why. It has, however, inspired me to run Seafoam through a vacuum hose tomorrow. It worked well on the car I had before last so I'm fairly convinced that while it may not fix the issue, it'll be a good thing to do anyway. I'll report back on how it goes.
If you haven't already acted, I would see how confident they are that carbon buildup is the culprit. Did they run a borescope down the spark plug hole and observe excessive carbon buildup in that cylinder, or is it an assertion based on what they heard? If they laid their eyes on it, I'd say give the cleaning a try. Getting a second or third opinion at another dealer or indy would be an excellent idea, regardless.
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1922 Ford Model T / no OBD
If I understand latest update, the stealer wants to milk the warranty for $2000 and still pulls diagnostic cost in cash from the owner?
First get the diagnosis in writing as "most likely" is not going to cut if they screw up.
I would have longer talk with SA or manager.
First get the diagnosis in writing as "most likely" is not going to cut if they screw up.
I would have longer talk with SA or manager.
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From: Cincinnati
2010 E350 4Matic
Not clear why you say the dealer is milking the warranty. They are totally doing him a favor if they replace the mounts under warranty.
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From: Cincinnati
2010 E350 4Matic
