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While putting the vapor canister back into my '78, I dropped the screw that hold the two ends of the clamp together. I looked for that guy for over an hour. I can't find it!!!!!!!!. Giving up I went to the hardware store. But without knowing the size it was no use.
No help with the screw size but the last time I dropped an aluminum float nut off my carb I blew 60 psi of air down the spot it went and it flew out on the floor.
Just a thought
I found a long missing fastener once when I stuck my camera down in the area months later to take a detail pic of something for someone else. There was my missing screw
When I lose things like this I credit it to them falling into the 4th dimension. Then I go get my jar of misc screws and find a replacement. Or go to Lowe's....lol
Good luck finding it.
Just another reason I will never be NCRS......
Your not the only one missing a screw??!! (Did I just do that to myself?)
I misplaced a plug for the exhaust gas sensor, and searched for it for days....couldn't find it, so I used a sparkplug from one of my aircraft engines (same thread pitch.)
Three months later I found that stupid plug in a bowl that I got a Metal burr out of the day I was working on it.....just brought a smile to me.
I think it's part of the joy (frustration) of working on these things.
I removed the canister on my '74. The tap that fits the thread on the clamp says 1/4NC20. The bolt is 3/4 inch long, has a 3/8 hex head and a tapered tip. hope this helps.
Vapor canister c3 corvette, clamp bolt size.
Last edited by Cool bean; Nov 27, 2016 at 09:42 AM.
Surly it's magnetic. I have a handy dandy magnet on a spring handle like mechanical fingers ( got those too). My magnet will find any magnetic fastener no matter where it ends up.
2025 c3 ('74-'82) of the Year Finalist - Unmodified
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Good luck with the screw. It reminds me that about 15 years ago I had to change the crankshaft damper on our '78. At that time it lived in a "lock-up" garage, no power or light, and only a few inches spare length, so all done with the aid of a "flashlight" (in England we'd say torch, but I know that would cause you guys a heart attack!) and in very little space. Anyway, I decided I'd change the timing case seal. I really struggled to get it out in the circumstances and finally stuffed a screwdriver into the edge of the seal and gave it a good whack! The seal flew out and disappeared somewhere into the front end of the car - I have never seen it since!
It fell into a plastic bag lying on the floor. While looking I must have picked up the bag and set it on my bench. picked the bag up yesterday and ther it is. Thanks everyone for the great ideas to look for it. i'm sure I'll get a chance to use them. The other stories helped ease the pain and frustration. I hate to think how much time i've lost looking for dropped bolts screw parts and tools.
Doesn't everyone have a "cable magnet"? (magnet on the end of a flexible cable) Just stick the magnet down into the 'black hole' and let it wander around. You'll snag it after a beer....or two.
P.S. Consider yourself 'lucky' that the socket and/or wrench didn't fall in there, too.
I have lost a nut bolt or socket never to be found again. That is till I started the engine and it blew out the mufflers. Guess it fell into the exhaust pipes.
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Lost Screw = Bad Day
. Giving up I went to the hardware store. But without knowing the size it was no use.
) and in very little space. Anyway, I decided I'd change the timing case seal. I really struggled to get it out in the circumstances and finally stuffed a screwdriver into the edge of the seal and gave it a good whack! The seal flew out and disappeared somewhere into the front end of the car - I have never seen it since!
