Strange noises from engine
Thread Starter
Member
Joined: May 2012
Posts: 111
Likes: 1
From: Chicago
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; Nov 23, 2014 at 06:22 PM.
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
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.
