Help, rattle/vibration between 800-1000rpm.

lefthander · 10-21-2018, 07:33 AM

In P/N/D, revving past 800-1000rpm, I encountered vibration from engine to steering wheel. When the rpm drop down to 1000-800rpm, i felt it too.
So far I remove decaf stock downpipe and Ensure nothing is touching the downpipe.

So far replaced o2 sensors, belt tensioner, crank pulley and did not help.
Car drive fine, what else could be wrong?

lefthander · 10-21-2018, 08:44 PM

No one?

Imperial328i · 10-21-2018, 09:34 PM

N20 or N55?

lefthander · 10-22-2018, 04:18 AM

N20....

x

DanielW · 11-14-2018, 08:56 PM

I have a similar light chatter sound that only shows up after a complete warm up of the engine oil to near the F245 to 250 (center of the oil temp guage). If not completely warm up there is NO sound at that RPM. I thought I was rid of the sound when I changed oil to Castrol Edge euro 0W-40 rather than the thinned out BMW approved 0W-30 oil, but after the Castrol had about 4000 miles on it the chatter returned..?? I do remember that about a year ago when I was still using the 5W-30 BMW previously recommended oil I had no sound at that RPM ?

HELP If anyone knows what this is? I don't want to throw money at such a small little sound that does not come until the temp when the oil would be somewhat thinner. I considered that it might be cam chain slack due to lower oil pressure, but it is totally quiet at true idle. 73K presently and runs perfect - never any CEL lights. DanielW

DanielW · 11-14-2018, 08:59 PM

OH, I forgot that my header states my previous car THIS car is 2014 F32 435i. thanks for any advise. DanielW

lefthander · 11-16-2018, 08:20 AM

No idea too

DanielW · 03-08-2019, 08:41 PM

Lefthander ? did you ever get a solution to your chatter sound. Mine is still no worst but still there. I did do the AC pressure line weight for the (OTHER rattle at abt. 2500 rpm while accelerating) that has been talked about). That one totally went away , but not the small chatter passing up or down past 1000 rpm, which I talked about earlier in this post. Today's date is 03/08/2019. Someone help please. It is much quieter with the 5W-40 Castrol LL01 engine oil. Could I have a weak spring in the timing chain tensioner? Or PO might have let oil go too long and oil caked onto the tensioner bore ?? Any ideas would be appreciated

Tomfrom · 03-09-2019, 08:00 PM

I had the same issue with my e90 when driving (not in neutral). Was one of the bolts missing from part of the prop shaft. New bolt in the guibo joint fixed it.

antzcrashing · 03-10-2019, 12:31 PM

Does it have headsup display? If so could be coming from that unit

DanielW · 03-10-2019, 11:56 PM

My 2014 435i does not have a heads-up unit. Don't think those came out until later years ? thanks however--- I thought no one was even reading this post.

Still hoping someone knows what causes this. I'm ready to try replacing the cam chain tensioner, since the chatter sounds only when the oil temp is near the top center (250 F) (not overheated), but fully warmed up. I've never EVER had any CEL lights or any abnormal engine sounds. DanielW

lefthander · 05-27-2019, 08:55 PM

Saw your reply late, I found the root cause. It was caused by the flex joint of the original downpipe. I replaced with another catless downpipe and problem solved.

DanielW · 01-09-2021, 04:13 PM

Light rattle or buss sound is still present now at 900-1100 rpm, at 84K. I just stopped posting and continued to drive and enjoy my 435i N55. Now, I finally looked again at this post. Thank you so much for your kind post. I will get under there and check out my exhaust and that area.
You are the "MAN".

Some hope again to stop this rattle on an otherwise perfect BMW.

My 7th BMW, since (first was 1979 320i, which I drove 23 years and 314,000 miles).

DanielW, 2014 435i

10-21-2018, 07:33 AM	#1
lefthander Private First Class 14 Rep 137 Posts Drives: BMW F30 Join Date: Jan 2014 Location: CA iTrader: (0)	Help, rattle/vibration between 800-1000rpm. In P/N/D, revving past 800-1000rpm, I encountered vibration from engine to steering wheel. When the rpm drop down to 1000-800rpm, i felt it too. So far I remove decaf stock downpipe and Ensure nothing is touching the downpipe. So far replaced o2 sensors, belt tensioner, crank pulley and did not help. Car drive fine, what else could be wrong?
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10-21-2018, 08:44 PM	#2
lefthander Private First Class 14 Rep 137 Posts Drives: BMW F30 Join Date: Jan 2014 Location: CA iTrader: (0)	No one?
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10-21-2018, 09:34 PM	#3
Imperial328i Lieutenant 277 Rep 558 Posts Drives: 2015 MGM 328i, 2017 LBB M2 Join Date: Jan 2018 Location: Southern Maryland iTrader: (1)	N20 or N55? __________________ 2017 F80 ZCP - Mineral Grey Metallic
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10-22-2018, 04:18 AM	#4
lefthander Private First Class 14 Rep 137 Posts Drives: BMW F30 Join Date: Jan 2014 Location: CA iTrader: (0)	N20....x
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11-14-2018, 08:56 PM	#5
DanielW New Member 0 Rep 8 Posts Drives: 2007 328i Join Date: May 2008 Location: AR iTrader: (0)	I have a similar light chatter sound that only shows up after a complete warm up of the engine oil to near the F245 to 250 (center of the oil temp guage). If not completely warm up there is NO sound at that RPM. I thought I was rid of the sound when I changed oil to Castrol Edge euro 0W-40 rather than the thinned out BMW approved 0W-30 oil, but after the Castrol had about 4000 miles on it the chatter returned..?? I do remember that about a year ago when I was still using the 5W-30 BMW previously recommended oil I had no sound at that RPM ? HELP If anyone knows what this is? I don't want to throw money at such a small little sound that does not come until the temp when the oil would be somewhat thinner. I considered that it might be cam chain slack due to lower oil pressure, but it is totally quiet at true idle. 73K presently and runs perfect - never any CEL lights. DanielW
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11-14-2018, 08:59 PM	#6
DanielW New Member 0 Rep 8 Posts Drives: 2007 328i Join Date: May 2008 Location: AR iTrader: (0)	OH, I forgot that my header states my previous car THIS car is 2014 F32 435i. thanks for any advise. DanielW
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11-16-2018, 08:20 AM	#7
lefthander Private First Class 14 Rep 137 Posts Drives: BMW F30 Join Date: Jan 2014 Location: CA iTrader: (0)	No idea too
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03-08-2019, 08:41 PM	#8
DanielW New Member 0 Rep 8 Posts Drives: 2007 328i Join Date: May 2008 Location: AR iTrader: (0)	DanielW 2014 435i at 73K miles and still have the tiny rattle sound Lefthander ? did you ever get a solution to your chatter sound. Mine is still no worst but still there. I did do the AC pressure line weight for the (OTHER rattle at abt. 2500 rpm while accelerating) that has been talked about). That one totally went away , but not the small chatter passing up or down past 1000 rpm, which I talked about earlier in this post. Today's date is 03/08/2019. Someone help please. It is much quieter with the 5W-40 Castrol LL01 engine oil. Could I have a weak spring in the timing chain tensioner? Or PO might have let oil go too long and oil caked onto the tensioner bore ?? Any ideas would be appreciated
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03-09-2019, 08:00 PM	#9
Tomfrom New Member 2 Rep 9 Posts Drives: F30 320 M-sport Join Date: Aug 2018 Location: Bolton iTrader: (0)	I had the same issue with my e90 when driving (not in neutral). Was one of the bolts missing from part of the prop shaft. New bolt in the guibo joint fixed it.
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03-10-2019, 12:31 PM	#10
antzcrashing Brigadier General 1904 Rep 3,213 Posts Drives: 2018 BMW 440i GC Join Date: Sep 2007 Location: Eastern MA iTrader: (1) Garage List 2018 BMW 440i GC xD ... [9.75]	Does it have headsup display? If so could be coming from that unit
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03-10-2019, 11:56 PM	#11
DanielW New Member 0 Rep 8 Posts Drives: 2007 328i Join Date: May 2008 Location: AR iTrader: (0)	800-1000 rpm chatter, very quiet small sound My 2014 435i does not have a heads-up unit. Don't think those came out until later years ? thanks however--- I thought no one was even reading this post. Still hoping someone knows what causes this. I'm ready to try replacing the cam chain tensioner, since the chatter sounds only when the oil temp is near the top center (250 F) (not overheated), but fully warmed up. I've never EVER had any CEL lights or any abnormal engine sounds. DanielW
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05-27-2019, 08:55 PM	#12
lefthander Private First Class 14 Rep 137 Posts Drives: BMW F30 Join Date: Jan 2014 Location: CA iTrader: (0)	Saw your reply late, I found the root cause. It was caused by the flex joint of the original downpipe. I replaced with another catless downpipe and problem solved.
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01-09-2021, 04:13 PM	#13
DanielW New Member 0 Rep 8 Posts Drives: 2007 328i Join Date: May 2008 Location: AR iTrader: (0)	Thanks Lefthander I had just given-up. and still have the issue Light rattle or buss sound is still present now at 900-1100 rpm, at 84K. I just stopped posting and continued to drive and enjoy my 435i N55. Now, I finally looked again at this post. Thank you so much for your kind post. I will get under there and check out my exhaust and that area. You are the "MAN". Some hope again to stop this rattle on an otherwise perfect BMW. My 7th BMW, since (first was 1979 320i, which I drove 23 years and 314,000 miles). DanielW, 2014 435i
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