Tapping Sound on Cold Start
Thread Starter
Senior Member
Joined: Feb 2013
Posts: 475
Likes: 36
From: South Africa
2012 C63 AMG, 1991 325iS. Ex: 2011 C63 P31
Tapping Sound on Cold Start
Good day guys
Need some assistance here.
Only on cold start, I hear a rattling sound coming from the engine.
Once the engine is at optimum temperature, the noise is gone.
Is this normal or something to worry about?
Car is still under motorplan, so if it is an issue then I will send it off to Merc.
Thanx a mill
Need some assistance here.
Only on cold start, I hear a rattling sound coming from the engine.
Once the engine is at optimum temperature, the noise is gone.
Is this normal or something to worry about?
Car is still under motorplan, so if it is an issue then I will send it off to Merc.
Thanx a mill
Junior Member
Joined: Oct 2013
Posts: 31
Likes: 0
2009 c63
actually had the exact same thing. Noise only on cold cold start ups, gone when idle settles and regular or hard driving. Doesn't come from the engnie for me, more like mid-pipes. Thought it was a bad weld job or hole in the x-pipe/cat delete. Took it in and examined the underbody. Nothing loose nothing pierced. Could just be metal on metal contact due to the hard shaking of everything on a cold start up.
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C63 AMG P30 *EuroCharged*| Porsche Cayenne | Buell XB9SX
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Thread Starter
Senior Member
Joined: Feb 2013
Posts: 475
Likes: 36
From: South Africa
2012 C63 AMG, 1991 325iS. Ex: 2011 C63 P31
Thread Starter
Senior Member
Joined: Feb 2013
Posts: 475
Likes: 36
From: South Africa
2012 C63 AMG, 1991 325iS. Ex: 2011 C63 P31
Yeah it does, but hate to hear that noise! Any remedy? I've been told to put Liqui Moly Ceratec with clean oil to eliminate the noise, so will try that soon
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Joined: Dec 2002
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From: Montana/Alberta
C63 BS, GLA45
This. The tapping only comes up if you don't drive your car for a long period of time.
It's not just temps. I store my cars for 6 months a year, and it always makes the noise on startup after such a long period of time without any run time. If you sit and idle it, it'll just tap away even at warm temps. You need to drive it a little, to get some real oil pressure into the system to get rid of the tapping. Typically, I fire up the car, let the idle drop to <1000rpm, then just drive at 20% throttle. Takes a block or 2 for the sound to go away.
I've owned 4 cars with the M156 and they all do this after not driving them for several weeks.
I've owned 4 cars with the M156 and they all do this after not driving them for several weeks.
MBWorld Fanatic!
Joined: Sep 2005
Posts: 3,165
Likes: 59
C63 AMG P30 *EuroCharged*| Porsche Cayenne | Buell XB9SX
This. The tapping only comes up if you don't drive your car for a long period of time.
It's not just temps. I store my cars for 6 months a year, and it always makes the noise on startup after such a long period of time without any run time. If you sit and idle it, it'll just tap away even at warm temps. You need to drive it a little, to get some real oil pressure into the system to get rid of the tapping. Typically, I fire up the car, let the idle drop to <1000rpm, then just drive at 20% throttle. Takes a block or 2 for the sound to go away.
I've owned 4 cars with the M156 and they all do this after not driving them for several weeks.
It's not just temps. I store my cars for 6 months a year, and it always makes the noise on startup after such a long period of time without any run time. If you sit and idle it, it'll just tap away even at warm temps. You need to drive it a little, to get some real oil pressure into the system to get rid of the tapping. Typically, I fire up the car, let the idle drop to <1000rpm, then just drive at 20% throttle. Takes a block or 2 for the sound to go away.
I've owned 4 cars with the M156 and they all do this after not driving them for several weeks.
MBWorld Fanatic!
Joined: Sep 2005
Posts: 3,165
Likes: 59
C63 AMG P30 *EuroCharged*| Porsche Cayenne | Buell XB9SX
yeah, I know...you actually told me this a couple of years ago, and i did have to have 2 cam adjusters replaced. this particular sound is the tick tick ticking, though, not the cam shaft rattle. although, I will say that the very first time I noticed the ticking sound, which was last week, I did get a brief cam shafty rattle (hasn't rattled since though).
