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Cold start noise cx5 #4713628
04/01/18 09:22 PM
04/01/18 09:22 PM
Joined: Sep 2005
Posts: 269
Maine, USA
pda1122 Offline OP
pda1122  Offline OP
Joined: Sep 2005
Posts: 269
Maine, USA
Vehicle: 2016 Mazda cx-5 2.5L 11,xxx miles
Cold start sounds like a can of marbles being shook around coming from engine. Goes away when I rev even the slightest bit or after like 10 seconds (feels like an eternity). Is this normal on skyactiv engines due to their filter not having adbv? Does the system have an internal valve? Is it because of Mazda’s value line (Mexico made) of filters the dealership has? Did this before my oil change that the dealer did and after I put in 5 qts qsud 0w-20 and pe01-14-302a-mv filter


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Re: Cold start noise cx5 [Re: pda1122] #4713639
04/01/18 09:36 PM
04/01/18 09:36 PM
Joined: Mar 2017
Posts: 5,767
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,767
...
A quick way to rule out the filter would be to switch it. I’m running the M1 EP 108A with no issues.

Of course any mechanical issues should not be ruled out but the filter change is a cheap and quick option to start with.


2017 Mazda CX-5 GT.

Valvoline Modern Engine 0w20
Mobil 1 EP 108A
Re: Cold start noise cx5 [Re: pda1122] #4713651
04/01/18 09:53 PM
04/01/18 09:53 PM
Joined: Nov 2006
Posts: 20,133
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,133
MA, Mittelfranken.de
I doubt it has anything to do with the filter, it sounds like its probably common direct injector noise to me.


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Re: Cold start noise cx5 [Re: Trav] #4713680
04/01/18 10:45 PM
04/01/18 10:45 PM
Joined: Dec 2017
Posts: 1,159
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,159
US
Originally Posted By: Trav
I doubt it has anything to do with the filter, it sounds like its probably common direct injector noise to me.


Wouldn't it continue past 10 seconds if it was injectors?

I agree with trying another filter.


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Re: Cold start noise cx5 [Re: JLTD] #4713787
04/02/18 05:42 AM
04/02/18 05:42 AM
Joined: Nov 2006
Posts: 20,133
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,133
MA, Mittelfranken.de
No. I should have said noise due to DI, it could be the injectors themselves, pump noise at the cam at cold start or cold combustion chamber noise which is more common with higher compression ratios and DI or diesels. IIRC the Sky Active engines have a higher compression ratio of around 14:1.

In any case there is nothing that can be done about it, its the nature of the beast for some engines. If the noise was present before and after the filter was changed I doubt both filters were bad, its a vertical filter with no ADBV (according to the OP) si if that's the case how could it be the filter?


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Re: Cold start noise cx5 [Re: PimTac] #4713790
04/02/18 05:45 AM
04/02/18 05:45 AM
Joined: Jan 2011
Posts: 2,753
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,753
N.Ohio
Originally Posted By: PimTac
A quick way to rule out the filter would be to switch it. I’m running the M1 EP 108A with no issues.

Of course any mechanical issues should not be ruled out but the filter change is a cheap and quick option to start with.

That's what I would try. Oil could be getting past an anti bypass mechanism that's leaking after an overnight shutdown. An inexpensive try. You can try using of those doctor "thingys" you put in your ears to listen for the source. I think Harbor Freight might might have a cheap version.

Last edited by Lubener; 04/02/18 05:56 AM.

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Re: Cold start noise cx5 [Re: pda1122] #4713803
04/02/18 05:59 AM
04/02/18 05:59 AM
Joined: Apr 2008
Posts: 12,913
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 12,913
Onondaga County
I thought mazda played some sort of games with the valve timing on these things on cold start to get the cat up to temperature ASAP? They all sounded horrible to me when starting ...


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Re: Cold start noise cx5 [Re: pda1122] #4713828
04/02/18 06:49 AM
04/02/18 06:49 AM
Joined: Dec 2009
Posts: 390
Cincinnati
quint Offline
quint  Offline
Joined: Dec 2009
Posts: 390
Cincinnati
My wifes 2017 Mazda3 with the 2.5 sounds positively scary on cold stars. It lasts 1-2 minutes or until it starts getting warm, then it gets very quiet pretty quickly. I've driven enough Skyactiv's either test driving or as rentals and they were all this way. It sounds like a combination of marbles in a can and a small exhaust leak. If it doesn't sound like this once its warmed up I wouldn't worry about it at all.


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2017 Mazda 3
2017 Kia Rio
Re: Cold start noise cx5 [Re: pda1122] #4713869
04/02/18 07:44 AM
04/02/18 07:44 AM
Joined: Jan 2013
Posts: 1,372
America's Dairyland
LotI Offline
LotI  Offline
Joined: Jan 2013
Posts: 1,372
America's Dairyland
SkyActive motors vary the valve timing during cold starts to warm up the cat quickly. They do this because the cat is pretty far from the motor (by today’s standards) due to the long-tube headers. During normal operation the exhaust is better scavenged and part of the reason we can run 87 octane with a 13:1 compression ratio. It’s 14:1 in regions where higher octane fuel is the norm.

Since the OP is from Maine, I assume you know what that sounds like. Mine will do it for ~30 seconds on a typical winter morning. It does not sound like DI clatter.


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Re: Cold start noise cx5 [Re: pda1122] #4713907
04/02/18 08:57 AM
04/02/18 08:57 AM
Joined: Jan 2009
Posts: 13,859
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,859
Illinois
Try a MC FL910 which has the ADBV. I use that on my Fords with no start up noise.


2007 Ford Fusion 232,000 miles
M1 0-20 EP
2017 Ford Fusion 58K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: Cold start noise cx5 [Re: pda1122] #4713938
04/02/18 09:33 AM
04/02/18 09:33 AM
Joined: Oct 2014
Posts: 12,039
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 12,039
Idaho
Check the noise on another Mazda like yours then report back.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Cold start noise cx5 [Re: pda1122] #4714068
04/02/18 11:49 AM
04/02/18 11:49 AM
Joined: Sep 2005
Posts: 269
Maine, USA
pda1122 Offline OP
pda1122  Offline OP
Joined: Sep 2005
Posts: 269
Maine, USA
I tried to get video of the sound but of course the vehicle didn’t want to cooperate. It didn’t make the sound today. shrug


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'08 Hyundai Elantra-Mobil 1
'96 Ranger R72 90hpJohnson
'03 Ski Doo REV 600 H.O.
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Re: Cold start noise cx5 [Re: pda1122] #4714415
04/02/18 06:42 PM
04/02/18 06:42 PM
Joined: Nov 2006
Posts: 20,133
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,133
MA, Mittelfranken.de
You can try a filter but if it were a filter issue it probably wouldn't stop making noise one day and make it the next. Its under $10 so why not start with the cheapest thing first but I don't think you have a real issue, ask the Mazda dealer.


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