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So I'm in the midst of swapping my fuel injectors and I'm trying to crack loose one of the retaining bolts for the fuel rail. Give it a little too much force and not only does my hand slip and get a nasty gash down the ring finger, I broke a vacuum line! Great... Cracked the bolt at least So I grabbed the broken line and unplugged it from the rubber T joint that it comes from, put a little super glue on it (to retain and remember the shape of it) and now I'm looking to see how/where I can find a replacement for it. I took a video of the line after I glued it and I tried my best to show where it came from. I know that the vacuum line plugs into the plenum and the other one into the fuel pressure regulator. Here's the video:
I went to the local auto store and they don't have the nylon-like tubing that this vacuum line has... I figure no one is going to have this in stock so I thought it best to come to the forum. Here's a few more pictures to help:
Rubber T connection
Zoomed out so you can get perspective of the location
The whole "repaired" vacuum line. The bottom end of it plugs into the T connection
So does anyone know where to get vacuum lines for C4 corvettes? Or what to replace them with if I can't get the proper solid nylon tubing? I can't be the only one to have broken a vacuum line... right?
Last edited by FAXITTOME; Apr 8, 2021 at 06:39 PM.
I use small vacuum line and put a little "right stuff rtv" in the nylon and slip the rubber over it to kind of glue it back. I have seen many c4's in the pick a parts out here but rare to find those lines fully intact.
These plastic lines are used in a number of applications. Check a truck repair depot. It is used for air lines on the shift mechanism. Our Rona(Lowes) stocks it in rolls of varying sizes. Google will supply you with a multitude of outlets for this line.
I use small vacuum line and put a little "right stuff rtv" in the nylon and slip the rubber over it to kind of glue it back. I have seen many c4's in the pick a parts out here but rare to find those lines fully intact.
I replaced all my under hood “spaghetti” nylon lines with the traditional rubber vacuum lines. I got tired of patching after I snapped the second one like you did.
As far connectors, just leave a stub of the original nylon line, smear some sealant on the line, then push some rubber vacuum line of the correct size over the end. (Make sure you don’t plug the end of the line with sealant.)
Not all the spaghetti lines are the same size. I took a few sections to ORielly and matched them up to the various sizes of the rubber vacuum hose on the shelf.
I replaced all of the lines, even the old rubber lines. Cheap little project. Vacuum gauge check shows better than before.
I replaced all my under hood “spaghetti” nylon lines with the traditional rubber vacuum lines. I got tired of patching after I snapped the second one like you did.
Same here. The original vacuum lines are brittle due to age, next one will crack soon or may have tiny leaks.
Dorman has tubing that will work, apologies, I forget what they call it (not "vacuum tubing").
I replaced all mine with silicone vacuum tubing. It's a little bulky around the AIR valve but it fits. Much better in my opinion than the brittle vacuum line and doesn't weld onto things like the regular rubber line tends to after a bit.
'85 C4 Broken Vacuum Line
So I grabbed the broken line and unplugged it from the rubber T joint that it comes from, put a little super glue on it (to retain and remember the shape of it) and now I'm looking to see how/where I can find a replacement for it. I took a video of the line after I glued it and I tried my best to show where it came from. I know that the vacuum line plugs into the plenum and the other one into the fuel pressure regulator. Here's the video:
