2002 E320 engine noise
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Junior Member
Joined: Dec 2010
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e320
2002 E320 engine noise
When car is cold there is a ticking noise from L/Hand side of engine. Noise goes away when engine is at operating temp.. anyone has any suggestion, oil is change at 5000. miles interval Mobil 1 ( 10w 40 )
MBWorld Fanatic!
Joined: Oct 2007
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From: SoCal
98 Brilliant Silver E320 Wagon
Hello and Welcome to the forum -
I believe what you are hearing is the MOT valve. It's a solenoid valve which bleeds excess fuel back to the fuel tank. It's just behind the windshield washer tank and usually has the letters 'MOT' on the top. Sound is normal.
I believe what you are hearing is the MOT valve. It's a solenoid valve which bleeds excess fuel back to the fuel tank. It's just behind the windshield washer tank and usually has the letters 'MOT' on the top. Sound is normal.
Super Member
Joined: Jun 2006
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From: the Netherlands
'01 W210 E320 CDI
Could be a valve lifter (valve tap) these are hydraulic. I noticed 10W-40 wich is semi-synthetic. Isn't there supposed to be fully synthetic 5W-40 or 0W-40 in your engine?
Thread Starter
Junior Member
Joined: Dec 2010
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e320
Oil
Hi Lancelot,
I am using Mobil 1, 10W-40 which is Fully Synthetic... I thing u r correct when u suggested a valve lifter
Thanks
Senior Member
Joined: Mar 2010
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From: Florida
2013 ML350, 2019 S560
I would change oil viscosity to 0W-40. Pumps up faster at start. My 2002 E320 ran strong for 155K with Mobil 1 0W-40 on your 5K oil change cycle for 8 years before I sold it. Never any oil-related issues.
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From: New Jersey
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