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2006 E350 engine noises
Hello all this is my first post in the gasoline section of Peach parts. I now have, or have had for about three years an 06 E350 with about 90K miles on it. Been driving MB diesels for years and been in that forum. We bought it as a CPO from the MB dealer with around 49K miles. It has had awhat was a slight knock, sounds like a main brg, at start up usually after sitting for at least 20 minutes. Now it has progressed to doing it at cold start up from time to time. I have an appt at MB Monday, I just wanted to hear from the gas side of the forum if there has been any history of this in the W211 series with the 3.5L V6? Thanks for any responses.
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Keith Schuster 2006 E350 98K miles 2013 Ford Explorer 15K miles |
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Have you been running synthetic engine oil like Mobil 1? If you have what kind of oil change interval have you been following? I am of the opinion that these are pretty robust engines.
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Jim |
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Other than the "soft" balance shaft gears, they are a good engine.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
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Sure it's not just a valve tappet that bleeds down while the engine sits? I'm not as familiar with this engine, but every m112 I've ever heard has tappet noise like crazy after sitting overnight. It's really no big deal.
The other thought - again based on m112 experience - is carbon build up from too much gentle city driving. A good italian tuneup is the solution for this particular problem. |
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I would be very interested in hearing what your dealer has to say about the noise you are experiencing, as my wife's E350 wagon makes the same noise. I notice it more on cold starts and occasionally when starting the car after it has been driven and then shut down for more than 30 minutes.
The service advisor at the MB place here said not to worry about it, but it is not a pleasant sound, even though it doesn't last long. There is a post or two on BenzWorld about this, but no one has reported back with a resolution to the issue, except one reply which states that replacing the "air pump" made the sound go away???? Good luck.
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Christopher '06 Mercedes E350 station wagon (silver/black) '85 Mercedes 300D (black pearl/palomino) '85 Mercedes 300SD (smoke silver/burgundy) '79 Cadillac Sedan DeVille '05 Toyota Camry (because always running is nice) '85 Mercedes 300D sold back to orig. owner 8-1-06 '84 Volvo 264GL Diesel, owned 2000-2013 |
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Quote:
The fix is pretty straight-forward. Remove engine and dis-assemble bottom end. Inspect markings on crank-case, indicating what size bearing shells the upper side requires. Once this is determined, replace OE uppers with one size smaller bearing shells. Let us know what the dealer says. |
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I'm sure they will be thrilled to hear it.
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Jim |
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Quote:
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Keith Schuster 2006 E350 98K miles 2013 Ford Explorer 15K miles |
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Quote:
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Keith Schuster 2006 E350 98K miles 2013 Ford Explorer 15K miles |
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Keith, I presume you use Mobil 1 0W40 in your 2006 E350. If not, switch to that weight Mobil 1 and see if the tapping sound disappears.
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Fred Hoelzle |
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What are they gonna' do?
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Okay, Keith, you have me on the edge of my seat....
What was the final verdict? Or did your dealer just tell you to ignore it like mine did.
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Christopher '06 Mercedes E350 station wagon (silver/black) '85 Mercedes 300D (black pearl/palomino) '85 Mercedes 300SD (smoke silver/burgundy) '79 Cadillac Sedan DeVille '05 Toyota Camry (because always running is nice) '85 Mercedes 300D sold back to orig. owner 8-1-06 '84 Volvo 264GL Diesel, owned 2000-2013 |
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