2002 LS1 PCV valve

**Black WS-6** · 09-04-2010, 06:59 PM

Just doing some basic maintainance to my TA. Figured I would check the PCV valve. I see it's located to the left of the intake just behind the throttle body. It looks as though it has a rubber cover on it and has what appears to be a ground wire attached to this cover. I have never seen anything like this on any PCV system. How is the valve removed? I shook it and it seems pretty gummed up so I wouldn't mind spraying it down with some intake cleaner or replacing it.

**pajeff02** · 09-04-2010, 07:07 PM

I believe it just pulls out of the rubber boot. They are notorious for cracking where they attach to the intake and causing a vacuum leak.

**pajeff02** · 09-04-2010, 07:10 PM

I pulled a pic up of the replacement assembly I purchased from the dealership -- not cheap. There are threads on here of PCV mods and a repair utilizing a spark plug boot if you ever have other problems.

**Black WS-6** · 09-04-2010, 07:12 PM

Originally Posted by pajeff02

I pulled a pic up of the replacement assembly I purchased from the dealership -- not cheap. There are threads on here of PCV mods and a repair utilizing a spark plug boot if you ever have other problems.

What purpose does the ground wire serve?

**pajeff02** · 09-04-2010, 07:15 PM

Originally Posted by Black WS-6

What purpose does the ground wire serve?

I assume it prevents static in the tubing. Similar to grounding the hoses on a woodshop dust collector. Of course, it could just be the General's way of holding it in place.

**Black WS-6** · 09-04-2010, 08:05 PM

Originally Posted by pajeff02

I believe it just pulls out of the rubber boot. They are notorious for cracking where they attach to the intake and causing a vacuum leak.

I was able to get it off no problem once I saw what I was dealing with. Has a crazy ground wire going to it that loops inside the rubber boot cover. I can see what you mean by cracking near the intake. I would hate to break that fitting off the intake because by the looks of it it's molded and part of it. That would suck!

**Cutlass** · 09-05-2010, 06:37 PM

Originally Posted by pajeff02

I assume it prevents static in the tubing. Similar to grounding the hoses on a woodshop dust collector. Of course, it could just be the General's way of holding it in place.

I've also heard the strap is there to transfer heat from the engine block to the valve to keep it from icing up in the cold winter weather...but I'm not sure of its exact purpose(s)

BTW OP, if your PCV boot does crack/fail, may I suggest a PCV upgrade? Might be time to consider an LS6 valley cover and oil catch can

**pajeff02** · 09-05-2010, 06:39 PM

Originally Posted by Cutlass

I've also heard the strap is there to transfer heat from the engine block to the valve to keep it from icing up in the cold winter weather...but I'm not sure of its exact purpose(s)

That could be... I assume the system does draw some moisture in from the blowby.

**Lunatikgixxer** · 09-05-2010, 10:31 PM

how do u know if the pcv valve is going bad?

**pajeff02** · 09-06-2010, 03:07 AM

Originally Posted by Lunatikgixxer

how do u know if the pcv valve is going bad?

Shake it. If you hear it rattle it is generally good. A gummed up valve won't make any noise, or will be very slow to respond to the shaking. This is how you checked the old school PCV's, anyone know if this still holds true?