First time out
- Thread starter bobtile
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sorry Bob I'm not sure what to do
maybe 'thin rubber strip' under all of it
If you have the room
not sure that'd help any either
shot in the dark
did it have adequate room around all sides (?)
not a tight fit, so it can expand a little
looks like it does on the bottom, not sure the rest
I'm stumped
I wonder if it was expansion, cool then heat cycle ?
several cycles of them, that cracked it (?)
or of the drilling/countersinking, had little nicks (?)
that helped/cracked it
sorry not much help here
maybe contact the Lexan mfgr, see what they say/think
it's worth a shot, only loss a little time, if they can't help
maybe 'thin rubber strip' under all of it
If you have the room
not sure that'd help any either
shot in the dark
did it have adequate room around all sides (?)
not a tight fit, so it can expand a little
looks like it does on the bottom, not sure the rest
I'm stumped
I wonder if it was expansion, cool then heat cycle ?
several cycles of them, that cracked it (?)
or of the drilling/countersinking, had little nicks (?)
that helped/cracked it
sorry not much help here
maybe contact the Lexan mfgr, see what they say/think
it's worth a shot, only loss a little time, if they can't help
Last edited:
bobtile
Well-Known Member
I've never screwed Lexan. But I 'd think about installing screws that are shouldered. That way when they are tightened they will bottom on the sheet metal instead of crushing the Lexan. Best idea in my opinion would be contact a car builder and ask them how they do it. McAmis , Bickle or someone local.
Doug
Doug
bobtile
Well-Known Member
I actually barely have the screws touching the lexan.
When I first installed them, I used a drill bit that was a bit oversized for the lexan to move. Unfortunately, I used the same bit into the sheet metal which caused the loose condition.
When I re did the lexan, I offset the bottom holes from the previous ones.
This time, I drilled the bottom holes in the lexan first, then used a slightly undersized bit for the sheet metal. It was difficult turning the screws down but I feel where I stopped them, they are there to stay.
Like I said, they are barely touching the lexan.
We'll see how it works.
When I first installed them, I used a drill bit that was a bit oversized for the lexan to move. Unfortunately, I used the same bit into the sheet metal which caused the loose condition.
When I re did the lexan, I offset the bottom holes from the previous ones.
This time, I drilled the bottom holes in the lexan first, then used a slightly undersized bit for the sheet metal. It was difficult turning the screws down but I feel where I stopped them, they are there to stay.
Like I said, they are barely touching the lexan.
We'll see how it works.
I never dealt with lexan but I'd drill the hole 1/16" larger than the screw and use finish washers on the screw.
Ok got it.
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Not sure what's worse....listening to the rap crap from my neighbor's kids pool party or having the problem you're having! Time to go in the house I guess and shut down the shop.
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Good info to know
Thanks
Never thought of using it (Loctite) on plastic
I know not to now
Loctite expands when it drys I believe and cracks the lexan. Gorilla glue does the same thing. Forgot that earlier.
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Looks real nice Bob! 
HEMI-ITIS
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Did for me!
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