Cold Start Engine Knock / Rattle

cv8 · 08-22-2010, 10:43 AM

Quote:

Originally Posted by alpineweissM3

Mine is at the dealer now for the same exact noise. The regional tech will look at it Monday as the dealers shop foreman has no clue what it is. The foreman did say it wasn't a bearing issue. I'm getting tired of all these trips to the dealer.

Please let me know the outcome. I'm very interested.

dny · 08-22-2010, 05:48 PM

i had these thud noise after a cold start lately. i will bring the car to the dealer tomorrow.

alpineweissM3 · 08-22-2010, 08:51 PM

Quote:

Originally Posted by han405

May I ask which dealer you are using? It's not Sewickley is it?

P&W

han405 · 08-23-2010, 12:11 AM

Quote:

Originally Posted by alpineweissM3

P&W

I see, if P&W can't give you a good result, then try Rahal BMW, I've always had good experience with them.

Best of luck to you, please keep us posted with the result.

Thank you.

alpineweissM3 · 08-23-2010, 09:29 AM

Don't get me started on Rahal. I'm in the South Hills and bought my car there. Rahal is the closest for me, but P&W's service dept is leagues ahead of them IMHO.

han405 · 08-23-2010, 08:02 PM

Quote:

Originally Posted by alpineweissM3

Don't get me started on Rahal. I'm in the South Hills and bought my car there. Rahal is the closest for me, but P&W's service dept is leagues ahead of them IMHO.

Really? I'll give them a try next time.
I also bought my car at rahal.
Do you get a loaner car from p&w?

Thanks.

alpineweissM3 · 08-23-2010, 08:28 PM

I do get a loaner from P&W everytime. Although, they only have 328i X-Drive loaners. With Rahal, I've had X5's and a few 335's....much better than the boring 328's!

lambobambo · 08-24-2010, 03:29 AM

I own a 2007 E92 M3....
It was released with the registration AV57, the 57 deterimines that it was sold in the second half (5) of the year 2007 (7).
One of the first cars in the UK.
38,000 miles and going strong, no faults (yet).

alpineweissM3 · 09-20-2010, 12:53 PM

**Update**
The car is fixed! The "VANOS" check valves were bad.
They started by replacing the cam tensioners. When that didn't correct it, they moved to the check valves now all is well again.

cv8 · 09-24-2010, 06:11 AM

Quote:

Originally Posted by alpineweissM3

**Update**
The car is fixed! The "VANOS" check valves were bad.
They started by replacing the cam tensioners. When that didn't correct it, they moved to the check valves now all is well again.

Thanks for the update. I'm going to speak to my dealer about this.

Cheers!

SUB-ZERO · 09-24-2010, 07:52 AM

Quote:

Originally Posted by markjord

Hmm I must be dreaming then. There I was thinking my car was a 2007 E92.
Seriously though, the E92 was released in 2007 in Europe. This crops up a lot. So take my word, I own one.

If one were to look at the recent post on this forum, detailing all the specs of all the M3s ever made, the e9X m3 is listed as a 2007+ model. I also thought this was weird but now I know that in Europe, e9x sales began in 2007.

BTW, I can't see the video because it is blocked at work but I think that a mild clicking noise at start-up is normal. Has it been getting progressively worse over time or has it always been the same?

-SZ

mrad01 · 10-19-2010, 12:39 AM

Quote:

Originally Posted by cv8

Thanks for the update. I'm going to speak to my dealer about this.

Cheers!

So, how did it go for you?

cv8 · 10-19-2010, 11:51 AM

Quote:

Originally Posted by mrad01

So, how did it go for you?

The dealer is willing to investigate the check valves under warranty and the car goes in on Monday.

mrad01 · 10-19-2010, 02:38 PM

Quote:

Originally Posted by cv8

The dealer is willing to investigate the check valves under warranty and the car goes in on Monday.

Cool, keep us posted. Mine has the same sound and I really want to get it resolved.

cv8 · 10-26-2010, 09:45 AM

Despite agreeing with the dealer in advance that they would replace the check valves, they didn't. Instead they insist that the noise is coming from one of the pre-cats. I very much doubt this is the cause, but I'm willing to jump through this hoop. So the car is going back to have the pre-cat replaced on 9th Nov.

The saga continues.

JCtx · 10-31-2010, 01:49 PM

Quote:

Originally Posted by cv8

Despite agreeing with the dealer in advance that they would replace the check valves, they didn't. Instead they insist that the noise is coming from one of the pre-cats. I very much doubt this is the cause, but I'm willing to jump through this hoop.

In a way that's good; if that doesn't solve the problem (as expected), pre-cats can be eliminated as a possible cause.
As far as a VANOS check-valve being the culprit, it's a heck of a lot better news than a bearing problem, so that's welcome

. Without being present to determine where the noise is coming from, we all are just making uneducated guesses. I'd like to see a detailed picture of our VANOS system, which unlike the one on S85s, does not require a high-pressure oil pump for operation. I also can't visualize what exactly can be 'clicking' (2 metal surfaces hitting each other); detailed pictures of the system would help for sure. Anyway, good luck man, and please keep us posted. And yes, it's a smart move to investigate an engine noise that wasn't there before, especially when it can be duplicated, and on cars with possible 'bad' bearings (like mine). Take care.

mrad01 · 11-01-2010, 03:35 AM

Quote:

Originally Posted by elp_jc

In a way that's good; if that doesn't solve the problem (as expected), pre-cats can be eliminated as a possible cause.
As far as a VANOS check-valve being the culprit, it's a heck of a lot better news than a bearing problem, so that's welcome

. Without being present to determine where the noise is coming from, we all are just making uneducated guesses. I'd like to see a detailed picture of our VANOS system, which unlike the one on S85s, does not require a high-pressure oil pump for operation. I also can't visualize what exactly can be 'clicking' (2 metal surfaces hitting each other); detailed pictures of the system would help for sure. Anyway, good luck man, and please keep us posted. And yes, it's a smart move to investigate an engine noise that wasn't there before, especially when it can be duplicated, and on cars with possible 'bad' bearings (like mine). Take care.

Check Valve Definition for VANOS:
"The check valve maintains an oil supply in the VANOS transmission and oil circuits after the engine is turned off. This prevents the possibility of piston movement (noise) within the VANOS transmission system on the next engine start."

cv8 · 11-14-2010, 10:04 AM

Unsurprisingly, replacing the pre-cat has not cured the problem.

andrew270681 · 11-14-2010, 12:45 PM

Quote:

Originally Posted by cv8

Unsurprisingly, replacing the pre-cat has not cured the problem.

Im curious to see what it is. My car does the same thing! Just happens for a second then goes away.

My stealership told me its normal

everyone here says its not..

Im very curious to see if it is the check valve on the vanos. Makes sense.

mrad01 · 11-14-2010, 02:10 PM

Quote:

Originally Posted by andrew270681

Im curious to see what it is. My car does the same thing! Just happens for a second then goes away.

My stealership told me its normal

everyone here says its not..

Im very curious to see if it is the check valve on the vanos. Makes sense.

VANOS rattle on cold startup is normal - it is the metallic knocking noise which occurs just after the rattle which is the problem here. Have a close listen to the video on the first page of this thread.

andrew270681 · 11-14-2010, 04:15 PM

Quote:

Originally Posted by mrad01

Quote:

Originally Posted by andrew270681

Im curious to see what it is. My car does the same thing! Just happens for a second then goes away.

My stealership told me its normal

everyone here says its not..

Im very curious to see if it is the check valve on the vanos. Makes sense.

VANOS rattle on cold startup is normal - it is the metallic knocking noise which occurs just after the rattle which is the problem here. Have a close listen to the video on the first page of this thread.

Mine does that from time to time. I just thought it was part of the rattle. Obviously it's not.

Edman951 · 11-14-2010, 05:49 PM

My car does the same thing as the vid in post#1.
Been like that since its new, now got over 48,000km on it.

08-22-2010, 05:48 PM	#46
dny Private First Class 6 Rep 152 Posts Drives: m3 4door Join Date: Jun 2009 Location: va iTrader: (1)	i had these thud noise after a cold start lately. i will bring the car to the dealer tomorrow. __________________ M3 e90 - 35% tint / Ventureshield clearbra/ MS filter/ RPI scoop / LED angel eyes/OEM blacklines/ Matte black Kidney grille & sidemarker/ colormatched front reflector
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08-23-2010, 09:29 AM	#49
alpineweissM3 I love my beautiful wife! 27 Rep 632 Posts Drives: e90 ///M Join Date: Oct 2007 Location: Pittsburgh iTrader: (0)	Don't get me started on Rahal. I'm in the South Hills and bought my car there. Rahal is the closest for me, but P&W's service dept is leagues ahead of them IMHO.
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08-23-2010, 08:28 PM	#51
alpineweissM3 I love my beautiful wife! 27 Rep 632 Posts Drives: e90 ///M Join Date: Oct 2007 Location: Pittsburgh iTrader: (0)	I do get a loaner from P&W everytime. Although, they only have 328i X-Drive loaners. With Rahal, I've had X5's and a few 335's....much better than the boring 328's!
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08-24-2010, 03:29 AM	#52
lambobambo First Lieutenant 77 Rep 348 Posts Drives: BMW M2 Comp Join Date: Jan 2009 Location: Winchester, UK iTrader: (0)	I own a 2007 E92 M3.... It was released with the registration AV57, the 57 deterimines that it was sold in the second half (5) of the year 2007 (7). One of the first cars in the UK. 38,000 miles and going strong, no faults (yet). __________________ HRE P40 Wheels (20" Charcoal), BMW Performance ZCP Spoiler & Splitters, Eisenmann Race, BMW Performance Steering Wheel, Carbon Fibre Exterior Trim (Front & Side Grills), Eibach Pro Springs (Not yet fitted). Last edited by lambobambo; 08-24-2010 at 04:10 AM..
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09-20-2010, 12:53 PM	#53
alpineweissM3 I love my beautiful wife! 27 Rep 632 Posts Drives: e90 ///M Join Date: Oct 2007 Location: Pittsburgh iTrader: (0)	Update The car is fixed! The "VANOS" check valves were bad. They started by replacing the cam tensioners. When that didn't correct it, they moved to the check valves now all is well again.
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10-26-2010, 09:45 AM	#59
cv8 Enlisted Member 14 Rep 36 Posts Drives: 1003 Join Date: Jan 2009 Location: UK iTrader: (0)	Despite agreeing with the dealer in advance that they would replace the check valves, they didn't. Instead they insist that the noise is coming from one of the pre-cats. I very much doubt this is the cause, but I'm willing to jump through this hoop. So the car is going back to have the pre-cat replaced on 9th Nov. The saga continues.
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11-14-2010, 10:04 AM	#62
cv8 Enlisted Member 14 Rep 36 Posts Drives: 1003 Join Date: Jan 2009 Location: UK iTrader: (0)	Unsurprisingly, replacing the pre-cat has not cured the problem.
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11-14-2010, 05:49 PM	#66
Edman951 Second Lieutenant 57 Rep 287 Posts Drives: 2014 i3, Capparis White Join Date: Nov 2006 Location: Montreal, Quebec iTrader: (1)	My car does the same thing as the vid in post#1. Been like that since its new, now got over 48,000km on it.
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