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If noone makes one, you can try a 1 1/4" plumbing quik cap rubber with a hose clampDoes 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?
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.
and this is exactly what I was reffering to ferncos are good but theres an american made one that has has better rubber. fyiThanks 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.
