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2015 Skyactiv OCV Failed Again #4939535 11/30/18 09:59 AM
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buster Offline OP
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After having the OCV replaced about 2 months ago, I noticed yesterday that it is leaking again. I was told they either didn't install it right or there is a crankcase vacuum issue. Taking it to the dealer December 12th. I'm curious what they find. I'm taking it to a different dealer this time. Car is still under warranty (55k miles).


D823480D-2340-44DC-970C-98AFE4A62C48.jpeg333D519A-397E-40ED-A2C2-113D8C52801B.jpeg

2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939553 11/30/18 10:24 AM
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AZjeff Offline
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Had to look that up. >Here's how it works< if curious. Can you tell if it's not working?


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The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939558 11/30/18 10:31 AM
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buster Offline OP
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I'm going to see if the PCV is pulling a vacuum later today by pulling the oil cap when the car is running and putting my hand over the filler. Thanks for sharing that AZjeff. smile


2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939576 11/30/18 10:47 AM
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E150GT Offline
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Does your engine have a lot of blowby? If I remove the oil cap while the engine is running it sounds like a worn out diesel and sprays oil droplets all over.


1984 Mercedes-Benz 300SD - 100k
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Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939599 11/30/18 11:14 AM
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buster Offline OP
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Not that I'm aware of. Oil stays on full mark through the entire interval and fairly golden color. There was one time (last winter) due to extremely short trips to work (less than 7 miles in severe cold) where the oil level went over the top fill mark, but that was from fuel dilution. I have no explanation for this other than either the OCV is faulty, installed wrong or there is a crankcase vacuum issue.

The dealer that did the previous job botched the valve cover gasket and had to redo it. Hopefully this dealer does a much better job. The manager working with me is aware of the previous situation. I just have to hope I get a tech that isn't a dope.


2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939602 11/30/18 11:17 AM
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SubieRubyRoo Offline
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E150GT, nearly any inline 4 will do the same as you describe... there is not a lot of crankcase volume, and with the pistons pumping up and down there is a lot of air movement that will blow some oil back up through the drain holes into the head and create the issue you describe.

Re: 2015 Skyactiv OCV Failed Again [Re: SubieRubyRoo] #4939618 11/30/18 11:35 AM
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buster Offline OP
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Originally Posted by SubieRubyRoo
E150GT, nearly any inline 4 will do the same as you describe... there is not a lot of crankcase volume, and with the pistons pumping up and down there is a lot of air movement that will blow some oil back up through the drain holes into the head and create the issue you describe.


True, but the OCV are not supposed to leak regardless.


2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939675 11/30/18 12:40 PM
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PimTac Offline
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I wonder if the replacement was faulty?


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Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939696 11/30/18 01:02 PM
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buster Offline OP
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Possible. I'm just really irritated because they rushed the job last time and didn't properly seal the valve cover gasket. I had to take the car back 2x for them to fix it right. It was a rush job. They worked on the recall and the OCV at the same time and rushed it through. I've heard not so good things about this dealer too. So now I'm going to the better one and the manager knows the entire situation so they better get it right this time.


2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939701 11/30/18 01:12 PM
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The Critic Offline
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Technically, the seal failed - not the OCV itself.

I have one of these seals on my shelf and it appears to be a "press fit" type seal. If I recall correctly, this is a plastic cover, and plastic covers are usually not good candidates for press-fit type seals to be replaced. Nissan VQ35 valve covers with non-replaceable spark plug tube seals come to mind.

So, perhaps the cover itself is slightly deformed in that area and this is why it is not sealing?


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Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939723 11/30/18 01:40 PM
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buster Offline OP
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Hmmmm that's a very good point Critic. What are the chances the dealer tech will even think of that? LOL

Maybe I will bring this up to the them when I drop it off.


2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #4939798 11/30/18 02:52 PM
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CT8 Offline
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While all The fancy tech stuff is groovy, the more plumbing there is the easier it is to clog up the pipes.

Re: 2015 Skyactiv OCV Failed Again [Re: CT8] #4939888 11/30/18 04:58 PM
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PimTac Offline
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Originally Posted by CT8
While all The fancy tech stuff is groovy, the more plumbing there is the easier it is to clog up the pipes.




Maybe but the old cars were constantly being worked on as well.


2017 Mazda CX5
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Roki OEM filter.
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #5003263 02/06/19 05:04 PM
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buster Offline OP
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Dealership is replacing VC/Seal/OCV and it will be covered under warranty. I went to the dealer this morning to drop the car off. Service writer wrote up the problem wrong, so he re-wrote it. Service manager had one of their senior techs come out and I explained the problem. They called me back about an hour later and said it will be covered. I'm pretty happy they are going to cover it. Hopefully they do the job right this time. Parts have to be ordered but they gave me a 2019 CX3 loaner, which is not bad I have to say.


2019 Nissan Frontier Pro 4X - 4.0L V6 Factor Fill
Re: 2015 Skyactiv OCV Failed Again [Re: buster] #5003327 02/06/19 06:22 PM
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yugrus Offline
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Hope the picture shows properly. Here's how mine looks like.
This time it's gotta be a charm for you!

20190106_122104.jpg
Last edited by yugrus; 02/06/19 06:23 PM.

'14 Chevrolet Tahoe
'15 Mazda CX-5
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