I did my PCV hoses while the plenum was off. LUCKILY I used the Z1 Silicone hose kit because I had the "snip 'em an replace" attitude. I hosed myself by doing that to the exhaust valve cover. (pun intended) I assumed I was doing those valve cover's gaskets, but I couldn't get to the bolts and had to leave them. I quickly realized that without having that cover off I wouldn't have the clearance to put on the new hose. I had to shorten the rear PCV hose(new) then put on one side and use angled needle 0nose pliers to try and fold/retract the very flexible silicone hose. Point being, if it were rubber I could have never done it, as it was I *barely* got that one on there. Leave the rear PCV hose alone unless you know it's leaking, then at that point, pray.
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