Headlight Help Needed
Thread Starter
Instructor
Joined: Jan 2009
Posts: 112
Likes: 0
From: Rockwall, TX
Headlight Help Needed
I have checked all lines and everyone holds good vacuum. Motor is a 355 with baby camshaft, pulls a steady 20 in.Hg of vacuum. I can disconnect one headlights vacuum and the other unit will go up 3/4 way and go back down when motor is shut off. Same applies to both sides. Both lights will move up 1/8" when everything is connected but that is it. Both lights go down good when manually put up when car is shut off. The coffee can (82 Vette) had a small crack which I repaired. I have a hard time getting anything over 5 in.Hg in the canister with a hand held pump, but it does not leak down. How do I check the canisters and valves. The valves seem both okay when I check vacuum at the line that runs to the headlight switch. They will pump up and hold vacuum. Any suggestions will be greatly appreciated. I thought patience may pay off but after many hours, but have run out. Thanks, Mark
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
I have checked all lines and everyone holds good vacuum. Motor is a 355 with baby camshaft, pulls a steady 20 in.Hg of vacuum. I can disconnect one headlights vacuum and the other unit will go up 3/4 way and go back down when motor is shut off. Same applies to both sides. Both lights will move up 1/8" when everything is connected but that is it. Both lights go down good when manually put up when car is shut off. The coffee can (82 Vette) had a small crack which I repaired. I have a hard time getting anything over 5 in.Hg in the canister with a hand held pump, but it does not leak down. How do I check the canisters and valves. The valves seem both okay when I check vacuum at the line that runs to the headlight switch. They will pump up and hold vacuum. Any suggestions will be greatly appreciated. I thought patience may pay off but after many hours, but have run out. Thanks, Mark
