Engine start up

pnguyen1028 · 05-26-2009, 05:15 PM

Whenever I start up my engine, I hear a clanking sound in the first second or two of the start up. It's not a smooth start up and it happens regardless of if it's a cold start or if it's warmed up. It's like something is loose inside and it's being shaken around.

Is this normal? Car runs fine otherwise. No abnormal lights.

Car has 750 miles on it.

ronnyek · 05-26-2009, 05:32 PM

could be wastegates... the clatter, but I wouldnt say it sounds like a clank. Not clean sounding and not real pronounced... just a tapp tapp tappp

jeremyc74 · 05-26-2009, 05:49 PM

Is your car usually in a garage when you start it up?

I hear the noise too, but it's only really noticable when I'm in the garage, or next to a wall where the noise reflects back.

It's my assumption that it's the wastegates closing.

Dangerlucas · 05-26-2009, 05:57 PM

Similar questions have been asked quite a few times and usually the culprit is the flapper valve in the exhaust. You could try the golf tee mod and see if it goes away in order to confirm this.

pnguyen1028 · 05-26-2009, 06:07 PM

It usually is in the garage when I start it up in the morning, yes.

Thanks for the quick replies guys. I'm pretty confident that it's not an abnormal thing now.

It doesn't sound very healthy though I have to admit.

135i_jaijai · 05-26-2009, 06:38 PM

that's normal.. no worries!

Rambler · 05-26-2009, 06:39 PM

I get a noise too but it's more of a "tinny" noise than a clanking.

Triple DDD · 05-27-2009, 03:31 PM

Definitely a case of muffler bearings going bad

05-26-2009, 05:15 PM	#1
pnguyen1028 Private 5 Rep 96 Posts Drives: 09 Alpine White 135i; 6 Speed Join Date: May 2009 Location: Mill Creek, Washington iTrader: (1)	Engine start up - Clanking? Whenever I start up my engine, I hear a clanking sound in the first second or two of the start up. It's not a smooth start up and it happens regardless of if it's a cold start or if it's warmed up. It's like something is loose inside and it's being shaken around. Is this normal? Car runs fine otherwise. No abnormal lights. Car has 750 miles on it.
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05-26-2009, 05:32 PM	#2
ronnyek Captain 23 Rep 682 Posts Drives: 2010 Evo MR Touring Join Date: Mar 2008 Location: space iTrader: (1)	could be wastegates... the clatter, but I wouldnt say it sounds like a clank. Not clean sounding and not real pronounced... just a tapp tapp tappp
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05-26-2009, 05:49 PM	#3
jeremyc74 Banned 76 Rep 5,970 Posts Drives: '08 135i Montego/Terra Join Date: Feb 2008 Location: Evansville, IN iTrader: (0)	Is your car usually in a garage when you start it up? I hear the noise too, but it's only really noticable when I'm in the garage, or next to a wall where the noise reflects back. It's my assumption that it's the wastegates closing.
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05-26-2009, 05:57 PM	#4
Dangerlucas Captain 30 Rep 621 Posts Drives: BMW 135i Join Date: Jul 2008 Location: Bay Area, CA iTrader: (2) Garage List 2008 135i [5.50]	Similar questions have been asked quite a few times and usually the culprit is the flapper valve in the exhaust. You could try the golf tee mod and see if it goes away in order to confirm this. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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05-26-2009, 06:07 PM	#5
pnguyen1028 Private 5 Rep 96 Posts Drives: 09 Alpine White 135i; 6 Speed Join Date: May 2009 Location: Mill Creek, Washington iTrader: (1)	It usually is in the garage when I start it up in the morning, yes. Thanks for the quick replies guys. I'm pretty confident that it's not an abnormal thing now. It doesn't sound very healthy though I have to admit.
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05-26-2009, 06:38 PM	#6
135i_jaijai Private First Class 11 Rep 117 Posts Drives: 135i Cabrio LeMans Blue Join Date: Nov 2008 Location: Vancouver BC iTrader: (1)	that's normal.. no worries! __________________ 08 E88 135i Cabriolet/Le Mans Blue/black boston leather/M sport package/Premium Package/Wind Deflector/6spd /Riss Racing Exhaust/BMC DCI/tinted head light/custom color grill/H&R race/koni yellow/z shift BOV/sebron OEM CF hood/19" SF-71
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05-26-2009, 06:39 PM	#7
Rambler Lieutenant 209 Rep 568 Posts Drives: 996 Turbo; G80 M3; FJ80 LC Join Date: Apr 2009 Location: central Connecticut iTrader: (0)	I get a noise too but it's more of a "tinny" noise than a clanking.
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05-27-2009, 03:31 PM	#8
Triple DDD Enlisted Member 0 Rep 32 Posts Drives: pick 'em up truck Join Date: Apr 2009 Location: P'cola iTrader: (0)	Definitely a case of muffler bearings going bad
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