Rattle during Engine Start
Thread Starter
Senior Member
Joined: May 2010
Posts: 302
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From: California
E63 AMG
Rattle during Engine Start
I get this intermittent rattle when I start the engine:
http://gallery.me.com/nardeezy#100650
See the third start (7/4@1803) at approx. 22 seconds. The dealer could not re-create. THey thought it was a heat shield so they re-positioned/formed one of the heat shields but I still get the rattle sometimes. Any thoughts?
http://gallery.me.com/nardeezy#100650
See the third start (7/4@1803) at approx. 22 seconds. The dealer could not re-create. THey thought it was a heat shield so they re-positioned/formed one of the heat shields but I still get the rattle sometimes. Any thoughts?
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Joined: Jun 2009
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Viking War Ship
It's really hard to tell from the video but it almost sounds like piston slap. Does it ever do it when it's hot or only when it's cold? Does it keep making that rattling noise for an extended period of time if you give it some gas right afterwards or is it just that first split-second after start?
My FD would slap like crazy when I'd start it in the winter (much colder than CA) and sounded much the same but for quite a lot longer period of time.
My FD would slap like crazy when I'd start it in the winter (much colder than CA) and sounded much the same but for quite a lot longer period of time.
Thread Starter
Senior Member
Joined: May 2010
Posts: 302
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From: California
E63 AMG
It's really hard to tell from the video but it almost sounds like piston slap. Does it ever do it when it's hot or only when it's cold? Does it keep making that rattling noise for an extended period of time if you give it some gas right afterwards or is it just that first split-second after start?
My FD would slap like crazy when I'd start it in the winter (much colder than CA) and sounded much the same but for quite a lot longer period of time.
My FD would slap like crazy when I'd start it in the winter (much colder than CA) and sounded much the same but for quite a lot longer period of time.
Super Member
Joined: Nov 2009
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Car free at the moment
I'm too lazy to listen to the clip, but it sounds likely to be hydraulic tappets/lash adjusters pumping up. Tappets usually get described as a tapping sound though. Very typical of the M112 and M113 motors. Nothing to worry about. Using the correct M1 0w-40 motor oil permits the tappets to bleed down when the engine is not running. It's actually a good sign, indicates the engines is not sludged/carboned up - then the tappets get stuck and don't tap - or self adjust.
Thread Starter
Senior Member
Joined: May 2010
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From: California
E63 AMG
I'm too lazy to listen to the clip, but it sounds likely to be hydraulic tappets/lash adjusters pumping up. Tappets usually get described as a tapping sound though. Very typical of the M112 and M113 motors. Nothing to worry about. Using the correct M1 0w-40 motor oil permits the tappets to bleed down when the engine is not running. It's actually a good sign, indicates the engines is not sludged/carboned up - then the tappets get stuck and don't tap - or self adjust.
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Thread Starter
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Joined: May 2010
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From: California
E63 AMG
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'19 G63 Ed 1,'18 M5, '16 G63,'12 458 , '11 E63, Brabus SL55-K8, '10 S63, '94 E500 "Wolf", '91 560SEC
I'd say lifters or the timing chain tensioner. Are you due for an oil change, I notice as it gets closer to oil change time for me on the 55 engine the lifters begin getting noisy.
Exhaust sounds damn good though.
Exhaust sounds damn good though.
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From: California
E63 AMG
FYI, I have a small dent on the right exhaust pipe located between the rear differential and muffler. If I tap the left exhaust tips with a mallot I hear a small rattle. WHen I tap the left exhaust tips I get no rattle.
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From: California
E63 AMG
Camshaft Adjuster Issue
Just to close the loop on this, it has been resolved for quite some time now. It took three separate dealer visits but they were finally able to replicate the sound and the root cause was due to a faulty camshaft adjuster. About 5,500 miles later and everything seems to be okay.
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From: Gulf Coast but not Florida
GLK350, SL63 AMG
Thank you!
Just to close the loop on this, it has been resolved for quite some time now. It took three separate dealer visits but they were finally able to replicate the sound and the root cause was due to a faulty camshaft adjuster. About 5,500 miles later and everything seems to be okay.
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Joined: May 2018
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W203 C180, W204 C200
Hi there nardeezy,
Would it be possible for you to reload the clip that you originally posted. I am currently trying to locate a rattle in my E55 that sounds like a loose exhaust baffle at cold start.
regards
Would it be possible for you to reload the clip that you originally posted. I am currently trying to locate a rattle in my E55 that sounds like a loose exhaust baffle at cold start.
regards
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From: California
E63 AMG
no need. This issue hasn’t been resolved and it’s isolated to the M156 motor only.
