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Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage #5236548 10/11/19 03:36 AM
Joined: Aug 2004
Posts: 21,156
The Critic Offline OP
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2013 Mazda 3 2.0L Skyactiv with 98.6K miles. The oil control valve (OCV) had been seeping oil for the last 20-30K miles and I finally had time to repair it. https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4951986/all-mazda-3-s-have-bad-ocv-s

The “seal” is actually a soft, stepped rubber sleeve (with a metal retention ring at the base) that is pressed into the valve cover itself. When the valve cover is removed, the oil control valve remains bolted to the valvetrain. To remove the sleeve, you simply push the sleeve out of the valve cover (from the outside). A new sleeve gets pushed into place via the backside of the valve cover, which is why valve cover removal is necessary to replace the OCV seal/sleeve.

The old seal/sleeve was not torn, it was just slightly harder than the new one. I am not sure if installing the new sleeve will fix the oil seepage; buster’s dealer did the job several times and ultimately installed a new OCV in addition to replacing the seal/sleeve. No TSB’s were found. We shall see if this fixes the problem. MSRP for the valve cover gasket and OCV seal/sleeve from Mazda was $59.39.

388D55A6-2D76-4E02-97A0-B60022206B8F.jpegF8DD4488-E165-4181-9741-104DC8162710.jpeg3FF93B69-6BD3-474C-83B0-EA1E7056A1A3.jpeg1F6D6FE6-B99C-4AC6-8827-393D34BA5AA1.jpeg2138DB0C-3B30-4C6B-9360-9EE4DF128DCF.jpeg5E153E75-2DF0-42BA-AAE8-46C078E8B3B4.jpeg

2011 Toyota Prius 1.8L - 197K - Pennzoil Platinum 0W-20
2007 Honda Accord 2.4L - 139K - Valvoline Premium Blue Restore 10W-30
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5236617 10/11/19 06:51 AM
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SOHCman Offline
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Nice clean engine there!


I urge people not to wait 100K to change out the fluid in their transfer case units. -Kestas
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5236715 10/11/19 08:43 AM
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PimTac Offline
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Looks great.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5236729 10/11/19 08:54 AM
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buster Offline
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Looks great. Great engine.

Critic, I'll be curious if this fixes it. My case was a bit unusual. What ultimately fixed it was a new valve cover. I originally brought the car in for the parking brake recall. While there, they rushed to also fix the OCV and didn't properly seal the valve cover. I had to take the car back and in doing so they replaced valve cover which finally fixed the issue.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5236749 10/11/19 09:13 AM
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paoester Online Content
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Posts: 86
Is that OCV for the variable valve timing hydraulics? And does this engine have variable valve lift?
Wonder if just a little coating (not much) of silicone rubber RTV gasket stuff around the rubber seal would seal it enough. ... Or is that considered more like a duct-tape style of fixing cars?

Last edited by paoester; 10/11/19 09:18 AM.
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5236914 10/11/19 11:50 AM
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bdcardinal Offline
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I wish Mazda would sell that seal with the valve cover gasket. It would make my life a lot easier.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5236931 10/11/19 12:14 PM
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buster Offline
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It's either a poorly designed part, or the crankcase pressure is the issue. You'll find some that weep with only 30k miles. Still a fantastic engine if that's the only thing wrong with it.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5237229 10/11/19 04:42 PM
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pezzy669 Offline
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Are those oil squirters for the cam lobes I am looking at? Don't know if I have seen that before.


2012 Volkswagen Jetta Sportwagen TDI - 66k
2011 Volkswagen Jetta Sportwagen TDI - 46k
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: The Critic] #5237247 10/11/19 05:00 PM
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wemay Offline
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That looks great!


2018 KIA Sportage LX 2.4 AWD:
Kendall GT-1 H. Performance 5W30, OEM
Next: Mobil Special 10W30, M1-104

2013 Hyundai Santa Fe Sport 2.0T:
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Next: GTX Magnatec 5W30, OEM
Re: Repair: Mazda 3 2.0L Skyactiv Oil Control Valve Oil Seepage [Re: pezzy669] #5237258 10/11/19 05:16 PM
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bdcardinal Offline
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Originally Posted by pezzy669
Are those oil squirters for the cam lobes I am looking at? Don't know if I have seen that before.


Mazda calls them "pipe, oil" p/n's PEDD-14-280 and PEDD-14-290.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
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