Question about Nissan Pathfinder

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I put a new motor in 91 pathfinder. Smokes like a train. I was told to replace PCV valve. Where is it and how do I change it. 4 wheel drive v6

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  • Malinda Richardson Aug 24, 2010

    I for got to thank you for your information. You were right that was not the problem. Some one missed a valve replacement on the new rebuilt engin and I lost number 2 cyl. It has been in the shop for a month now fighting with all the silly stuff with the warrenty co. I sure won't buy from them again.

    Thank you so much
    Malinda

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  • 2,100 Answers

The pcv valve is located in the rocker cover, Just a small plug type thing with a hose to it. I don't think that is the problem. I don't know what color the smoke is, but I hope it's black. I would bet the engine tipped in shipment or got turned up some how and the pistons have filled with oil. That would make the smoke blue, and it will burn off. Black smoke is a fuel mix that isn't right. And white smoke would be unburnt gas. I would get it running and see what happens. You may need to change a few other things on the intake that control the air fuel mix. You can get them from the old engine. Hope this helps.

Posted on May 05, 2010

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How to replace a pcv valve in a nissan pathfinder 2004


Anon, Could not find a lot of info. on this one. Check the attached links,instruction and guides, 1st link will show picture of PVC hose follow hose down to PVC valve which will be screwed into the lower part of intake or in a push in grommet/valve cover. Good luck

"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

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How difficult is it to change the PCV valve. 2004


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Robert

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