Knocking sound - BMW 3-Series (E90 E92) Forum

muzzammil15 · 01-28-2013, 04:57 PM

Ever since its been very cold, I get a weird noise when I start the car in the morning. When it is cold, I get a knocking sound on the driver side of the engine, below the intake manifold. This only happen when the car is cold, and the idle is sitting at 600 rpm. As I rev the engine a little bit the sound goes away and when the idle settle. The sound comes back, until the car warms up to normal temperature. The sound is like a rod is knocking, I have no codes, or any cel. Anyone else have this issue? I did some search, and did not find a clear answer. The car drives perfect with no issues. Any help would be great, thanks!

jordan313 · 01-28-2013, 06:53 PM

http://www.e90post.com/forums/showthread.php?t=13504...

BMWN54tech · 01-29-2013, 01:03 AM

Lifter tick. Although its more common on the N52, it does happen on N54 engines. Removing the camshafts and replacing the lifters is the fix. If you were more local I could help you out better.

muzzammil15 · 01-29-2013, 01:49 AM

Quote:

Originally Posted by BMWN54tech

Lifter tick. Although its more common on the N52, it does happen on N54 engines. Removing the camshafts and replacing the lifters is the fix. If you were more local I could help you out better.

Would this be covered under CPO warranty? I will go talk to the dealer. I had a similar sound before, and it turned out to be a loose TQ converter bolt. It was not torque down right. I wonder if it is the same thing, but I will mention the lifter issue to them.

335xi Kevo · 01-29-2013, 10:57 PM

I have the same thing. The ticking of the injectors and the knock of an unknown cause. I brought it into the dealer and they said it was the purge valve, and was considered normal however I think it's worse. It's already there for them to hear on a cold start, ill return with my results.

335xi Kevo · 01-29-2013, 11:02 PM

http://www.youtube.com/watch?v=kZF7t6bcysQ

same exact sound as my motor.

themyst · 01-29-2013, 11:25 PM

My car ticks when the engine is still cold. Goes away pretty quick when it's warm. It's almost non-existent in the summer. Had the same noise on two N54s.

335xi Kevo · 01-29-2013, 11:35 PM

Quote:

Originally Posted by themyst

My car ticks when the engine is still cold. Goes away pretty quick when it's warm. It's almost non-existent in the summer. Had the same noise on two N54s.

Tick is normal, it's an underlying knock like in the YouTube video.

muzzammil15 · 01-30-2013, 01:22 AM

Quote:

Originally Posted by 335xi Kevo

I have the same thing. The ticking of the injectors and the knock of an unknown cause. I brought it into the dealer and they said it was the purge valve, and was considered normal however I think it's worse. It's already there for them to hear on a cold start, ill return with my results.

Your knock is louder than mine, but I am still curious to know what is causing it. I will be taking my car into the dealer tomorrow and see what happens.

335xi Kevo · 01-30-2013, 01:05 PM

Any word yet? My SA hasn't gotten back to me.

muzzammil15 · 01-30-2013, 03:09 PM

Quote:

Originally Posted by 335xi Kevo

Any word yet? My SA hasn't gotten back to me.

I have an appointment on the 11th, that is the soonest they can get me in. One thing I noticed was, it is warm outside today and the knocking did not last as long as it would before. I had this similar knock sound in the past, and it turned out to be a loose torque converter bolt. They torqued it down correctly and the knocking sound went away. However when it got really cold out, the knocking came back.

335xi Kevo · 01-30-2013, 05:03 PM

Quote:

Originally Posted by muzzammil15

Quote:

Originally Posted by 335xi Kevo

Any word yet? My SA hasn't gotten back to me.

I have an appointment on the 11th, that is the soonest they can get me in. One thing I noticed was, it is warm outside today and the knocking did not last as long as it would before. I had this similar knock sound in the past, and it turned out to be a loose torque converter bolt. They torqued it down correctly and the knocking sound went away. However when it got really cold out, the knocking came back.

They're going through mine now. Unfortunately I'm 6MT.

muzzammil15 · 01-30-2013, 07:00 PM

After coming home from work this morning, I left my car outside (always garaged when home). After letting it sit outside for 5-6hours, I started it and let the idle settle at 600 rpm and the knock sound showed up. By the time i finished saying WTF the sound went away. The knock sound was there for maybe 3 seconds. After that she sounded perfect. I am starting to think, the sound is due to very cold weather. Today it was 70* so I am thinking in warm weather the knock sound will go away. This knock started when the temperature went below 40 degrees here.

01-28-2013, 04:57 PM	#1
muzzammil15 Slurpee anyone? Drives: 07 White 335i Join Date: Dec 2011 Location: VA beach Posts: 578 iTrader: (3)	Knocking sound Ever since its been very cold, I get a weird noise when I start the car in the morning. When it is cold, I get a knocking sound on the driver side of the engine, below the intake manifold. This only happen when the car is cold, and the idle is sitting at 600 rpm. As I rev the engine a little bit the sound goes away and when the idle settle. The sound comes back, until the car warms up to normal temperature. The sound is like a rod is knocking, I have no codes, or any cel. Anyone else have this issue? I did some search, and did not find a clear answer. The car drives perfect with no issues. Any help would be great, thanks! __________________ Ghetto mods central!!
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01-29-2013, 01:03 AM	#3
BMWN54tech Private Drives: e92 335. Join Date: Dec 2012 Location: USA Posts: 62 iTrader: (0)	Lifter tick. Although its more common on the N52, it does happen on N54 engines. Removing the camshafts and replacing the lifters is the fix. If you were more local I could help you out better. __________________ BMW master tech 2010 E92 335i 6-speed 25k miles. - For sale. 1989 E30 325i coupe 5-speed DD

01-29-2013, 10:57 PM	#5
335xi Kevo First Lieutenant Drives: 2008 335xi Join Date: Jan 2012 Location: CT Posts: 368 iTrader: (2)	I have the same thing. The ticking of the injectors and the knock of an unknown cause. I brought it into the dealer and they said it was the purge valve, and was considered normal however I think it's worse. It's already there for them to hear on a cold start, ill return with my results. __________________ 08' 335xi 6MT Space Metallic Grey Premium, Nav, Cold weather, Sport Procede//PWM Meth//VRSF XI Downpipe//Forge DV//DCI//KW V1//SCOOPS//ETS FMIC//ECS GEOMET ROTORS//HAWK//CDV//PERFORMANCE SPOILER//CSL//

01-29-2013, 11:02 PM	#6
335xi Kevo First Lieutenant Drives: 2008 335xi Join Date: Jan 2012 Location: CT Posts: 368 iTrader: (2)	http://www.youtube.com/watch?v=kZF7t6bcysQ same exact sound as my motor. __________________ 08' 335xi 6MT Space Metallic Grey Premium, Nav, Cold weather, Sport Procede//PWM Meth//VRSF XI Downpipe//Forge DV//DCI//KW V1//SCOOPS//ETS FMIC//ECS GEOMET ROTORS//HAWK//CDV//PERFORMANCE SPOILER//CSL//

01-29-2013, 11:25 PM	#7
themyst Major General Drives: E90 335i LCI Join Date: Feb 2009 Location: NYC Posts: 6,323 iTrader: (8)	My car ticks when the engine is still cold. Goes away pretty quick when it's warm. It's almost non-existent in the summer. Had the same noise on two N54s. __________________ E90 LCI N54 6AT

01-28-2013, 06:53 PM	#2
jordan313 Second Lieutenant Drives: 07 335i Join Date: Jun 2012 Location: CA Posts: 271 iTrader: (0)	http://www.e90post.com/forums/showthread.php?t=13504...

01-30-2013, 01:05 PM	#10
335xi Kevo First Lieutenant Drives: 2008 335xi Join Date: Jan 2012 Location: CT Posts: 368 iTrader: (2)	Any word yet? My SA hasn't gotten back to me. __________________ 08' 335xi 6MT Space Metallic Grey Premium, Nav, Cold weather, Sport Procede//PWM Meth//VRSF XI Downpipe//Forge DV//DCI//KW V1//SCOOPS//ETS FMIC//ECS GEOMET ROTORS//HAWK//CDV//PERFORMANCE SPOILER//CSL//

01-30-2013, 07:00 PM	#13
muzzammil15 Slurpee anyone? Drives: 07 White 335i Join Date: Dec 2011 Location: VA beach Posts: 578 iTrader: (3)	After coming home from work this morning, I left my car outside (always garaged when home). After letting it sit outside for 5-6hours, I started it and let the idle settle at 600 rpm and the knock sound showed up. By the time i finished saying WTF the sound went away. The knock sound was there for maybe 3 seconds. After that she sounded perfect. I am starting to think, the sound is due to very cold weather. Today it was 70* so I am thinking in warm weather the knock sound will go away. This knock started when the temperature went below 40 degrees here. __________________ Ghetto mods central!!

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