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Hello all, has anyone successfully replaced the pcv valve on their MDX yet? I'm unable to remove one of the bolts on the wire harness due to an air intake in the way. I circled in red in the picture for reference. If one know how to remove it or know a better way to access the pcv, please share your knowledge. Thank you.
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Would the bolt holding the PCV valve (red arrow) to the front valve cover be easier to access if you removed the air intake tube (yellow arrow) ???
That way you could sneak up from the bottom with a socket & unfasten the PCV bolt and pull the valve straight out?
Thanks for the suggestion. However, even if the air intake tube is removed. There is not enough clearance to put a socket to the pcv valve bolt. Due to the fact that the wire harness on top of the pcv area has a slight bent downward.
I will need to figure out a way to lift that end of the wire harness up a little bit without breaking the plastic cover, then I might have some space to access the bolt.
Thanks for the suggestion. However, even if the air intake tube is removed. There is not enough clearance to put a socket to the pcv valve bolt. Due to the fact that the wire harness on top of the pcv area has a slight bent downward. I will need to figure out a way to lift that end of the wire harness up a little bit without breaking the plastic cover, then I might have some space to access the bolt.
I see that you have already removed the #20 front cylinder head harness holder flange bolt (purple arrow).
My guess is to reasonably access the area, where the PCV lives, under the curved part of #11 front cylinder head harness holder (red arrow) below.
It appears you may have to remove the #1 air cleaner case set below (red arrow), no?
That way, you'd be able to 'fold' the loose front cylinder head harness holder (#11 above) out of the way to fit the socket / wrench to get at the PCV flange bolt?
Hello, I really appreciated your time for looking/posting the diagrams. After 1 hour of struggling, I was able to figure out how to remove. You are correct to remove the air cleaner box to access the 2nd bolt of the harness, however I didn't have to remove the unit entirely. I just loosen the 2 bolts (#2 and 3) in my picture. If anyone would like to do this, just follow my pictures. It shouldn't take you more then 30mins. Just follow my picture to remove the bolts. After you remove #1,2 and 3 bolts, just gently lift up the air cleaner box to access the last bolt. Hope, that's helpful.
