PAIR Delete - Air Filter Plug Question

[RFB]

Does anyone have an elegant way to plug the PAIR vacuum line on the intake assembly?

The barb is 1-1/8" OD. Does anyone make a 1-1/8" rubber vacuum cap?

Or should I just cut and weld it closed?

If noone makes one, you can try a 1 1/4" plumbing quik cap rubber with a hose clamp

 

[ToyotaMatt]

I'd be nervous with those cane tips- doubt that rubber is intended to withstand the temps it will see under the hood. You can see the cracks already. Probably wouldn't hurt anything if pieces got sucked in, but I wouldn't take the chance.

They have been installed for just over a year , & YES there are signs of dry-rot already , I could be said the Home-Depot solution

may be short term . I might Have to try the Slip-N-Fall freeze plug idea @Tools R Us has posted

 

[graham5david]

I have been wanting to delete the PAIR system in my 94 .does anyone have a good write up on this? I have searched mud extensively with no luck .

 

[NLXTACY]

I have an idea for the pipe. Let me find it.

 

[voodu3]

I have been wanting to delete the PAIR system in my 94 .does anyone have a good write up on this? I have searched mud extensively with no luck .

removing the egr and pair vsv's

 

[NLXTACY]

Expanding freeze plugs FTW.

 

[Will Van]

Thanks for the suggestions everyone!

This is the route I'm taking...the outside diameter of the PAIR port on my '93 intake is almost exactly 1-1/8" (or 1.125" or 28.6mm). That does not include the hose bead on the end of the port (the bead is about 1-3/16" or 1.1875" or 30mm OD).

I found a Fernco Quik Cap that is used in the plumbing industry that is almost the exact correct dimension. Qwik Caps | Fernco - US. It is manufacturer part number QC-1.07. The inside diameter of the Quik Cap is 1.05". That is only 0.075" (or 2mm) smaller than the port base. And 0.1375" (3.5mm) smaller than the OD hose bead. I chose the slightly undersized Quik Cap because I thought the rubber would expand slightly and the cap would fit nice an snug over the port. I think I can squeeze it over the hose bead and clamp it down and it will work perfectly.

If not, I might jump up to the next size Fernco Quik Cap, which is QC-1.38. The ID of the 1.38 cap is 1.32" or 33.5mm. It is 0.195" (5mm) larger than the port base. And about 0.133" (3.3mm) larger than the hose bead.

I also have considered the fact that these Quik Caps were not necessarily designed for vacuum, and there is a possibility that the 1FZ draws enough vacuum to suck the end off the cap. I'll just have to keep an eye on it. I think it would start drawing a vacuum leak before it totally destroyed the cap and sucked it down the intake.

Anyway, I'll keep you posted on how this solution works.

 

[Tools R Us]

Expanding freeze plugs FTW.

View attachment 1731865

Fail, not enough room for the logo, what, are you going to put a sign board on it?

 

[NLXTACY]

Fail, not enough room for the logo, what, are you going to put a sign board on it?

Plenty of room after I remove the chinese washer with US made one and then black zinc it and etch with my logo. Come on man! This is WHAT I DO!!

 

[80t0ylc]

Expanding freeze plugs FTW.........

I like the idea because it's meant to seal a hole. But a thought occured to me - it's meant to seal a hole in an engine block - solid steel or aluminum. And this application is the thinner metal of the air filter canister. There's a good chance of over torquing and deforming to where it would leak or even splitting and ruining the canister or at least the nipple that the old PAIR hose was on. I believe the rubber in the freeze plug is relatively hard and seals well on an engine block because the block is so much stronger than the rubber. But, not so for the air filter canister. I would include instructions to use care for this application. Something to think about.

 

[NLXTACY]

I like the idea because it's meant to seal a hole. But a thought occured to me - it's meant to seal a hole in an engine block - solid steel or aluminum. And this application is the thinner metal of the air filter canister. There's a good chance of over torquing and deforming to where it would leak or even splitting and ruining the canister or at least the nipple that the old PAIR hose was on. I believe the rubber in the freeze plug is relatively hard and seals well on an engine block because the block is so much stronger than the rubber. But, not so for the air filter canister. I would include instructions to use care for this application. Something to think about.

I’m not going to sell them

But it’s a perfect sealing solution...until it’s not LOL.

 

[RFB]

Thanks for the suggestions everyone!

This is the route I'm taking...the outside diameter of the PAIR port on my '93 intake is almost exactly 1-1/8" (or 1.125" or 28.6mm). That does not include the hose bead on the end of the port (the bead is about 1-3/16" or 1.1875" or 30mm OD).

I found a Fernco Quik Cap that is used in the plumbing industry that is almost the exact correct dimension. Qwik Caps | Fernco - US. It is manufacturer part number QC-1.07. The inside diameter of the Quik Cap is 1.05". That is only 0.075" (or 2mm) smaller than the port base. And 0.1375" (3.5mm) smaller than the OD hose bead. I chose the slightly undersized Quik Cap because I thought the rubber would expand slightly and the cap would fit nice an snug over the port. I think I can squeeze it over the hose bead and clamp it down and it will work perfectly.

If not, I might jump up to the next size Fernco Quik Cap, which is QC-1.38. The ID of the 1.38 cap is 1.32" or 33.5mm. It is 0.195" (5mm) larger than the port base. And about 0.133" (3.3mm) larger than the hose bead.

I also have considered the fact that these Quik Caps were not necessarily designed for vacuum, and there is a possibility that the 1FZ draws enough vacuum to suck the end off the cap. I'll just have to keep an eye on it. I think it would start drawing a vacuum leak before it totally destroyed the cap and sucked it down the intake.

Anyway, I'll keep you posted on how this solution works.

and this is exactly what I was reffering to ferncos are good but theres an american made one that has has better rubber. fyi

 

[LS1FJ40]

I used a rubber plug, with silicone cap over the top, and black Gorilla duct tape.

It fits the theme of my truck. “Less s***ty”

 

[Sk8Crash69]

I know this an old thread but I just did the PAIR delete on an 80s series (1994) and the size of the rubber expansion plug you need is a 1". Can be found on Amazon very quickly for anyone interested.