Broken HAC Vac Line Nipple (1 Viewer)

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Mar 28, 2020
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Steamboat Springs, Colorado
The desmog was going smoothly until I broke the top nipple on the HAC Valve. Living at high elevation and occasionally heading down to the desert I would like to keep this part of the cruiser. Does anyone have any successful ways of making a repair? I saw taking a small diameter pipe inside and then sliding the two sides back together. Also, I saw just taking a two part epoxy and just welding the outside together and using a drill bit to keep it clear of glue. Another option would be to source a new HAC valve. Any suggestions appreciated! Thanks
 

Spike Strip

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The HAC valve for early 4Runners is still available and almost identical to the LC. Only diff is the bottom nipple open at atmosphere is just a hole on the 4R
 
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Aug 30, 2009
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I've used regular super glue with good success on things like brittle plastic BVSV nipples.

in the future, try a razor blade to cut vac lines off of brittle old plastic bits (if thats how she broke)
 

Spike Strip

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I've used regular super glue with good success on things like brittle plastic BVSV nipples.

in the future, try a razor blade to cut vac lines off of brittle old plastic bits (if thats how she broke)

That's what I do. Vac tube way cheaper than replacing valves. I also use a film of synthetic grease on the nipples so they slip off next go round.
 
Joined
Aug 30, 2009
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Yeah, that 30 yo plastic is pretty brittle after a zillion heat cycles and thirty years of age. Carefully cutting a slit in the top of the vac line makes removal a lot easier. Ive used a tiny dab of brake cleaner to act as a lube when reinstalling the vac lines (it acts as a lube at first to slip the line on and then evaps out of the line and forms a good seal). Breaking things is all part of the learning process while wrenching
 

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