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Rattle after oil change that lasts for weeks #4778676
06/05/18 09:53 PM
06/05/18 09:53 PM
Joined: Jan 2008
Posts: 116
Los Angeles, CA
Scuderia Offline OP
Scuderia  Offline OP
Joined: Jan 2008
Posts: 116
Los Angeles, CA
The engine in question is a DOHC 2.0L in a 2010 Civic Si. Every time I change the oil I get this rattle during low speed driving at around 2500 RPM, and when changing gears; when I re-engage the clutch. It happens when the engine is cold, and with new oil. After the oil has been in the engine for some time (about a month), the rattle goes away. It's the weirdest thing.

I'm guessing it's viscosity related, maybe when the oil is new and cold it rattles, but as it shears down and the viscosity goes down the rattle subsides. But why exactly? I don't know, anybody have any ideas? Thanks.

Re: Rattle after oil change that lasts for weeks [Re: Scuderia] #4778680
06/05/18 10:00 PM
06/05/18 10:00 PM
Joined: Mar 2018
Posts: 858
Mississippi
TheLawnRanger Offline
TheLawnRanger  Offline
Joined: Mar 2018
Posts: 858
Mississippi
Low transmission flluid?


'99 Cavalier 5w 30 SuperTech conventional
'11 Impala 5w 30 Magnatec full synthetic
'12 Colorado 5w 30 Magnatec full synthetic
*regular Wix oil filters for all
Re: Rattle after oil change that lasts for weeks [Re: Scuderia] #4778687
06/05/18 10:08 PM
06/05/18 10:08 PM
Joined: Dec 2017
Posts: 1,453
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,453
US
Which oil / filter combo are you using? Does it do it at every temperature?


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL‚ĄĘ

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 45k, OE 5w30/Wix

Re: Rattle after oil change that lasts for weeks [Re: Scuderia] #4778698
06/05/18 10:44 PM
06/05/18 10:44 PM
Joined: Jun 2004
Posts: 137
Canada sometimes
Ded Mazai Offline
Ded Mazai  Offline
Joined: Jun 2004
Posts: 137
Canada sometimes
I guess this has something to do with the clutch splines clearances and the engine crankshaft vibration. Probably the clearances get reduced when the engine/gearbox warms up, and the problem goes away. And on the other hand, the oil viscosity affects the crankshaft dynamics in an unpredictable manner.

Re: Rattle after oil change that lasts for weeks [Re: Scuderia] #4778877
06/06/18 07:47 AM
06/06/18 07:47 AM
Joined: May 2009
Posts: 12,318
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,318
N.H, U.S.A.
I would try a different oil /filter combos. What I was told by a dealer was "normal" went awayc PERMANENTLY after experimenting with oil and filter combos. I will say I am pleased with Champion Labs branded as Mobil 1 filters - except for the cost.

Also check exhaust mounting integrity and motor/transaxle mount integrity. Any exaggerated vibration from cold engine warmup will be transferred to these parts.

Also, Cold viscosity affects flywheel lateral position ( through the crank thrust flange) which can affect clutch takeup.


2019 VW Jetta S,6M OCI#0 62mi-Castrol Edge Prof VW508+OE Filter; '17 Subaru Crosstrek CVT OC#5 37K mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Rattle after oil change that lasts for weeks [Re: Scuderia] #4778917
06/06/18 08:44 AM
06/06/18 08:44 AM
Joined: Sep 2015
Posts: 6,118
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,118
Kalifornia Kollective
+1 smile

First thing I'd do is swap in a Napa Gold filter and top up with one grade higher oil. The top up won't add much viscosity, but some. The filter change will alter the ADBV characteristics.

If there is a noticeable change, the rattle is somewhat oil related. If not, it's teh clutch or engine mounts or something else ...

Last edited by BrocLuno; 06/06/18 08:47 AM.

Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Rattle after oil change that lasts for weeks [Re: Scuderia] #4782713
06/10/18 03:04 AM
06/10/18 03:04 AM
Joined: Jan 2008
Posts: 116
Los Angeles, CA
Scuderia Offline OP
Scuderia  Offline OP
Joined: Jan 2008
Posts: 116
Los Angeles, CA
Thanks for the replies fellas. I think I found what it is; the timing chain tensioner. The timing on the chain is off by a little bit (pics included).I guess new and cold oil makes the chain and tensioner rattle. The car has 57,000 miles, so Iím hoping itís just the tensioner. Iíll try changing that first as it doesnít require tearing half the engine apart. And if the timing is still off, then Iíll change the chain. And curse and get all kinds of nicks on my hands lol

[img]https://i.imgur.com/4lciiDK_d.jpg?maxwidth=640&shape=thumb&fidelity=medium[/img] [img]https://i.imgur.com/JXE1zml_d.jpg?maxwidth=640&shape=thumb&fidelity=medium[/img]

Last edited by Scuderia; 06/10/18 03:07 AM.

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