E350 Starting noise??
04-19-2017, 10:49 PM
#1
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2001 E320, 2010 E350 Sedan, 2009 E350 Wagon, 2014 E350 Coupe, 2015 ML 350
E350 Starting noise??
Does anyone else's E350 make this noise on start-up??
Never really thought anything was wrong as it's done it before in front of my private mechanic and MB tech and they didn't say anything about it, but recently have had a few passengers ask me about it and now I am getting a little concerned.
Called the dealer and they just said "Some of them make this noise"
vehicle is a 2010 E350 with about 82k on it.
Never really thought anything was wrong as it's done it before in front of my private mechanic and MB tech and they didn't say anything about it, but recently have had a few passengers ask me about it and now I am getting a little concerned.
Called the dealer and they just said "Some of them make this noise"
vehicle is a 2010 E350 with about 82k on it.
04-21-2017, 12:29 AM
#2
My coworker has a C300 and it made this noise on startup and they ended up finding some recall on the engine related to something called piston slap
Excessive piston slap occurs when the clearance between the piston and the cylinder bore is too great. The piston to cylinder bore clearance becomes too great either through wear, mismatched pistons and cylinder bores at manufacturing or, a combination of both. The audible noise associated with excessive piston slap is due to the perpendicular impact of the piston against the wall of the cylinder bore. Audible piston slap is typically loudest when the engine is first started up. The pistons then expand with heat reducing the piston to cylinder bore clearance thus, reducing the perpendicular impact of the piston against the cylinder wall and its resulting noise.
https://www.google.com/webhp?sourcei...00+piston+slap
Excessive piston slap occurs when the clearance between the piston and the cylinder bore is too great. The piston to cylinder bore clearance becomes too great either through wear, mismatched pistons and cylinder bores at manufacturing or, a combination of both. The audible noise associated with excessive piston slap is due to the perpendicular impact of the piston against the wall of the cylinder bore. Audible piston slap is typically loudest when the engine is first started up. The pistons then expand with heat reducing the piston to cylinder bore clearance thus, reducing the perpendicular impact of the piston against the cylinder wall and its resulting noise.
https://www.google.com/webhp?sourcei...00+piston+slap
Last edited by i700plus; 04-21-2017 at 12:33 AM. Reason: added link
04-21-2017, 12:14 PM
#3
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'71 Pinto
May be tensioner, utilizes a hydraulic piston to keep timing chain at right tension. Part was modified several times, see attachment.
