PCV Elimination Plug

[ROYAL_6]

I'm in the process of eliminating the PCV valve in my car ('87-T) and was wondering if anyone has used a rubber plug to block off the PCV hole in the intake.

I've used the search feature on here, and have found that many have drilled and tapped the intake or have simply plugged/capped the PCV valve or plugged the the PCV hose.

Before I remove the intake to drill and tap it, I was wondering if anyone has used a rubber plug to block off the intake hole. If so, what rubber plug or cap did you use?

 

[Chuck Leeper]

EZ and no drill tap??

Lever Type Expandable Rubber Plugs | 143-1 Series | Petersen Products

143-1 Series Lever Type Expandable Rubber Plugs seal holes and openings and can be used to hang products. Purchase these easy to install expanding rubber plugs at affordable rates by Petersen Products.

www.petersenproducts.com

 

[jmendlik]

Chuck-Do you know which part number on this PCV device plug will be needed for deletion ??

 

[Chuck Leeper]

I've not measured the hole.
I had welded mine closed when I built the stage engine.
Maybe someone with a manifold off can measure it.

 

[jmendlik]

Anyone with a Champion lor stock Intake --can you measure the diamter of the PCV hole??

 

[1986 Buick GX1]

It seems more folks have added catch cans to the PCV system than anything else, although some have added an extra breather in that hole as well as the valve covers.
This breather pops right in the PCV grommet.

Pardon Our Interruption...

The above link does work.

 

[TurboSmart]

Dont block it, rather tap the hole and screw a fitting there with a hose.

I think that the hole is 3/4 but dont quite remember.

 

[1986 Buick GX1]

The size of the GM OEM grommet is .940”.
I suspect the hole in the intake is slightly smaller.
That should get you close for an expanding plug.

If you decide to use a fitting in the grommet, it’s right at .500”.

 

[ROYAL_6]

EZ and no drill tap??

Lever Type Expandable Rubber Plugs | 143-1 Series | Petersen Products

143-1 Series Lever Type Expandable Rubber Plugs seal holes and openings and can be used to hang products. Purchase these easy to install expanding rubber plugs at affordable rates by Petersen Products.

www.petersenproducts.com

Thanks! Great suggestion. I might try it out and see how it works.

 

[ROYAL_6]

It seems more folks have added catch cans to the PCV system than anything else, although some have added an extra breather in that hole as well as the valve covers.
This breather pops right in the PCV grommet.

Pardon Our Interruption...

The above link does work.

I did come across one old post that mentioned they used a small filter as the one you suggested. I guess it helps and its better than plugging the hole. Thanks for the link.

 

[vacuum 6]

I plugged and vented the front cover. Works great.

 

[SS/GN]

Curious to why your removing PCV valve?

 

[Turbo6inKY]

Curious to why your removing PCV valve?

it's in a really bad spot.

I just had an oil report come back with really high copper. Tore the engine down and the mains were trashed from trash.

When I pulled in the intake, there was a splotch of grit on the valley pan right below the PCV valve. The grommet had gotten hard and wasn't sealing and the valley is a low point so garbage gets in there and drains into the engine. Seems that spot is the most likely place for trash to get into the engine and cause you a large expenditure.

So, I do not advocate eliminating PCV. I do advocate making sure your grommet is healthy or closing that hole and moving it somewhere else.

 

[vacuum 6]

I wanted to eliminate oil contamination, intake debris, and the possibility of boost entering the engine. I saw this issue on my motor before removing the original setup. To help the engine breathe better/maintain ring seal, I added a breather to the front cover. Other than the smell while driving no problems. During high boost runs I no longer see any oil dripping from breathers or dipstick rising.