Edward Ackley

81 vette head light vacuum lines. I have replaced all of the vacuum lines from the head lights back to the fire wall does any one know a easy way to get them through the wall it seem like mine are sealed into the wall took the under dash vent tube off cant even see where the 2 lines come threw any help would be appriciated

caskiguy

https://www.corvetteforum.com/forums...-question.html

Edward Ackley

thanks for the reply, guess i have to solve this my way DRATS

ADmirer

Edward, I recently replaced all the vacuum lines on my '68. I had already purchased a new firewall grommet to replace the old one that was there. Like you, I couldn't get the new hoses to fit. I now know that the newer hoses are slightly larger than the factory one. I tried using a drill bit to slightly widen the existing holes. That didn't work as the rubber would just expand and allow the bit to pass through. So I borrowed a friend's Rotozip. I used a tile blade that had diamond grit on it. I was able to slightly widen the holes so that the lines would fit. I see the diagram above deals with the AC. But you mentioned the headlight vacuum lines and I know that those pass through the firewall and go to the headlight switch and to the override switches on mine. I'm not sure about how they work on a '81 but the method of widening the holes may work. Hope this helps.

Edward Ackley

thanks for the reply, altho i do not see a grommet i can feel the fire wall, my dream last night said this is a no brainer hooked my 14 inch needle nose pliers on to the 2 hoses coming into the engine bay easiely tried to pull on the 2 hoses they would not budge. I knew than this was not going to be easy. so i pulled the air vent tube thats under the dash above the drivers seat so i could see better. than i decided to set and think about this. bottom line there is no easy fix for this

Edward Ackley

for future if any one replaces all the head light vacuum lines, the question I had was how do you get them threw the fire wall. here is the answer. there is a rubber gromment going threw the fire wall, there is a flared side on the engine side, you must cut this off you than can take your finger and push it into the car. tape the new lines togeather one has a white line the other is black, feed them through the fire wall hole and the rest is a no brainer hope this helps some one in the future no i did not put a new gromment into the fire wall