PVC valve install
That is what I thought the mechanic at the dealer says the lip is suppose to butt up next to it and not go inside the hose. I am getting a vacuum leak so he taped it up tight.
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
This is typically true in older applications where the PCV valve inserts directly into the valve cover. But the boot used for the LS1 applications was designed to accept the entire valve within - and it has a provision inside the boot for the ridge/lip on the valve. The valve will in fact fully seat inside the boot with a little effort. The mechanic must not be familiar with these.
Thank you I will have to fix it myself because he doesn't think so and I don't want the person working on my car to be mad at me for sure. If he has torn the boot and that is why he taped it I am going to have a real problem though since that part is not serviceable which redoing the whole vacuum tubing around the intake.
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Just to be sure, I have a spare '99-'02 PCV boot in my parts stash and I checked to make sure it worked as I described above. My memory was correct, that lip goes fully inside the boot with a little effort. You can see the lip provision molded into the boot if you look inside of it. The mechanic probably thought it shouldn't be pushed that hard, but it takes a bit of effort to get it to seat properly.
I hope I can fix it back he has taped up the boot tight with black tape going to be hard to get off for sure. He says the mass airflow sensor was dirty with debris and that is causing the lean condition with po171 and p0174.
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Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Hopefully you will find it fully intact underneath the tape. These boots (and the elbow that connects to the intake) do tend to deteriorate (mine cracked apart around ~100k miles) so the tape might actually be helping. The proper thing would be to just replace it at that point though.
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Verdad Gallardo Thanks. I had that whole piece replaced 6 months ago so that is why I am hoping my new part is okay. We will see if the mass airflow sensor cleaning fixes the check engine light.
I've seen the spark plug boots used for this purpose, FWIW
I would bet the tech chickened out because it's hard to get in the boot. There is a metal heat sink inside the boot that clips around the PCV, which makes it a killer to get in.
I usually have to use a pair of needle nose pliers to hold the PCV while I push it in to the boot and manipulate the metal clip.
I usually have to use a pair of needle nose pliers to hold the PCV while I push it in to the boot and manipulate the metal clip.
Joined: Nov 2001
Posts: 34,629
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From: Schiller Park, ILL Member: #317
The valve location is different on a '98, and so is the clip. On the '99+ it connects to the head via a wire and nut. On the '98 there isn't a wire, the clip connects directly to the valve cover.
To the thread-starter, please, please don't use one of those cheap aftermarket PCV valves from Autozone. Those are ridiculous. The spring tension stops a millimeter short of the valve closing and will therefore sit open in the horizontal position, leading to even greater rates of oil consumption on top of the tremendous amount that the PCV in LS engines are known to suck out. Stay with the OEM AC Delco brand.