Noise after oil change

chriz1 · 10-24-2012, 03:44 PM

Had my cars oil changed last weekend and since then I have noticed on a cold start up at idle a kind of rattle sounds like a very rough vibration more than a rattle that slightly increases when the revs rise to about 1200 rpm when warm it sounds normal.checked the engine cover seems ok
Any Ideas ?

mistryn · 10-24-2012, 04:00 PM

Who did the change?
What oil grade was used?

Phil325i · 10-25-2012, 02:58 AM

I think mistryn's right. Wrong grade oil leading to hydraulic tappets rattling on start-up.

Mart1000 · 10-25-2012, 03:42 AM

Or it could be the cam chain rattling before the adjuster take up slack. Could be due to new oil bieng slightly thinner and cleaner.

Does the noise go away gradually or suddenly?

doughboy · 10-25-2012, 03:57 AM

New oil should be thicker.

Old oil becomes thinner as it breaks down and loses it sheer strength.

So with new oil (of the correct grade) the oil pressure should be higher as its thicker and things should rattle less!

creepy coupe · 10-25-2012, 04:14 AM

Do the genuine oil filters have non return valves in them?

dobbo99 · 10-25-2012, 05:17 AM

Quote:

Originally Posted by Mart1000

Or it could be the cam chain rattling before the adjuster take up slack.

is there anything that can be done to check this?

creepy coupe · 10-25-2012, 05:24 AM

If it's tappets, you should be able to listen while watching the crank pulley rotate. As the cams run at half crank speed you can normally tune into the sound being out of step.

xenon · 10-25-2012, 05:38 AM

Quote:

Originally Posted by doughboy

New oil should be thicker.

Old oil becomes thinner as it breaks down and loses it sheer strength.

So with new oil (of the correct grade) the oil pressure should be higher as its thicker and things should rattle less!

If it's thicker, or the wrong grade, it takes more time to prime the hydraulic lifters.

dxb335d · 10-25-2012, 07:19 AM

Maybe it was always there but you had not noticed.

chriz1 · 10-25-2012, 09:41 AM

National tyres did the oil using Castrol edge 5w 30,
I don't think it's mechanical engine runs sweet. it's like something rubbing, think it may only be there more from cold due to increase of idle speed..

IanS100 · 10-25-2012, 09:57 AM

It's a diesel so I wouldn't rule out dmf! The oil change wouldn't make any difference but maybe you were listening more carefully after it had been done

phil200tdi · 10-25-2012, 01:36 PM

I bet it's the plastic cowl under the HVAC filter.

Check the bolts are there!

chriz1 · 10-25-2012, 03:28 PM

Quote:

Originally Posted by phil200tdi

I bet it's the plastic cowl under the HVAC filter.

Check the bolts are there!

It does sound like a trim rattle,but defiantly sounds less when warm,guessing that's just due to smoother running and less vibration,any info on the location of this item you say
Thanks very much everyone

phil200tdi · 10-25-2012, 04:18 PM

If you try to move the plastic cowl under the Cabin filter it should not move. Its bolted down.

A mechanic may have forgotten to put the bolts back. Take a look.

chriz1 · 10-26-2012, 07:17 AM

Thanks il take a look at this

chriz1 · 10-26-2012, 03:58 PM

Sorted this out bolts needed tightening as mentioned above
Thanks everyone

phil200tdi · 10-27-2012, 05:49 AM

Lucky guess!

10-24-2012, 03:44 PM	#1
chriz1 Private First Class 20 Rep 177 Posts Drives: 320d? Join Date: Jun 2011 Location: S.wales iTrader: (0)	Noise after oil change Had my cars oil changed last weekend and since then I have noticed on a cold start up at idle a kind of rattle sounds like a very rough vibration more than a rattle that slightly increases when the revs rise to about 1200 rpm when warm it sounds normal.checked the engine cover seems ok Any Ideas ?
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10-24-2012, 04:00 PM	#2
mistryn Colonel 154 Rep 2,045 Posts Drives: BMW 335D Join Date: Oct 2011 Location: Mids iTrader: (8)	Who did the change? What oil grade was used?
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10-25-2012, 02:58 AM	#3
Phil325i Brigadier General 639 Rep 3,218 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	I think mistryn's right. Wrong grade oil leading to hydraulic tappets rattling on start-up. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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10-25-2012, 03:42 AM	#4
Mart1000 Capt Slow 38 Rep 1,076 Posts Drives: Leon FR Supercopa Join Date: Jan 2012 Location: Suffolk iTrader: (1)	Or it could be the cam chain rattling before the adjuster take up slack. Could be due to new oil bieng slightly thinner and cleaner. Does the noise go away gradually or suddenly?
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10-25-2012, 03:57 AM	#5
doughboy Major General 1578 Rep 8,971 Posts Drives: 2018 M2 Comp 6MT Join Date: Jan 2009 Location: UK iTrader: (2)	New oil should be thicker. Old oil becomes thinner as it breaks down and loses it sheer strength. So with new oil (of the correct grade) the oil pressure should be higher as its thicker and things should rattle less!
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10-25-2012, 04:14 AM	#6
creepy coupe Lieutenant General 1825 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	Do the genuine oil filters have non return valves in them?
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10-25-2012, 05:24 AM	#8
creepy coupe Lieutenant General 1825 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	If it's tappets, you should be able to listen while watching the crank pulley rotate. As the cams run at half crank speed you can normally tune into the sound being out of step.
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10-25-2012, 07:19 AM	#10
dxb335d The Tarmac Terrorist 1011 Rep 29,344 Posts Drives: 997.2 GT3 Join Date: Mar 2007 Location: ''Fandango Towers'' iTrader: (3) Garage List 2010 Porsche 997.2 GT3 [9.50] 2003 BMW E46 M3 [6.00] 2007 BMW E92 335D [5.50]	Maybe it was always there but you had not noticed. __________________ 997.2 GT3
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10-25-2012, 09:41 AM	#11
chriz1 Private First Class 20 Rep 177 Posts Drives: 320d? Join Date: Jun 2011 Location: S.wales iTrader: (0)	National tyres did the oil using Castrol edge 5w 30, I don't think it's mechanical engine runs sweet. it's like something rubbing, think it may only be there more from cold due to increase of idle speed..
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10-25-2012, 09:57 AM	#12
IanS100 Major General 135 Rep 5,050 Posts Drives: 520d F10 LCI M Sport Join Date: Nov 2011 Location: Southport UK iTrader: (0)	It's a diesel so I wouldn't rule out dmf! The oil change wouldn't make any difference but maybe you were listening more carefully after it had been done
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10-25-2012, 01:36 PM	#13
phil200tdi Colonel 115 Rep 2,621 Posts Drives: 335i M Sport E90 LCI manual Join Date: Jan 2011 Location: Aylesbury iTrader: (1)	I bet it's the plastic cowl under the HVAC filter. Check the bolts are there! __________________ Car: e91 330d with Viezu map Gone but not forgotten: 2010 Jaguar XFR (Cat-back exhaust, pulley, intake mods and map), Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)
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10-25-2012, 04:18 PM	#15
phil200tdi Colonel 115 Rep 2,621 Posts Drives: 335i M Sport E90 LCI manual Join Date: Jan 2011 Location: Aylesbury iTrader: (1)	If you try to move the plastic cowl under the Cabin filter it should not move. Its bolted down. A mechanic may have forgotten to put the bolts back. Take a look. Attached Images Last edited by phil200tdi; 10-26-2012 at 04:21 AM..
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10-26-2012, 07:17 AM	#16
chriz1 Private First Class 20 Rep 177 Posts Drives: 320d? Join Date: Jun 2011 Location: S.wales iTrader: (0)	Thanks il take a look at this
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10-26-2012, 03:58 PM	#17
chriz1 Private First Class 20 Rep 177 Posts Drives: 320d? Join Date: Jun 2011 Location: S.wales iTrader: (0)	Sorted this out bolts needed tightening as mentioned above Thanks everyone
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10-27-2012, 05:49 AM	#18
phil200tdi Colonel 115 Rep 2,621 Posts Drives: 335i M Sport E90 LCI manual Join Date: Jan 2011 Location: Aylesbury iTrader: (1)	Lucky guess! __________________ Car: e91 330d with Viezu map Gone but not forgotten: 2010 Jaguar XFR (Cat-back exhaust, pulley, intake mods and map), Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)
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