Strange noises from engine
11-23-2014, 06:16 PM
#1
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Join Date: May 2012
Location: Chicago
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2014 E350 Coupe 4Matic
Strange noises from engine
Please see the video, the engine is hot and those noises killing me, plus it sounds like a tractor
https://onedrive.live.com/redir?resi...nt=video%2cmp4
https://onedrive.live.com/redir?resi...nt=video%2cmp4
Please advice
https://onedrive.live.com/redir?resi...nt=video%2cmp4
https://onedrive.live.com/redir?resi...nt=video%2cmp4
Please advice
Last edited by Dimitri; 11-23-2014 at 06:22 PM.
11-25-2014, 11:03 PM
#2
MBworld Guru
Does it vary with engine speed? If not, it may be the secondary air injection pump. If it does, try removing the serpentine belt, then start the engine and see if the noise persists. It's safe to runt he engine for a minute or two, but not much longer as you'll have no alternator (thus draining the battery) and no water pump. If the noise stops, then it;s on one of the belt-driven pulleys - try spinning them by hand to see if you find a rough one.
