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Does anyone know how to tighten the plastic colored knobs on 1967 corvette window cranks? Are there any vendors that offer this repair? Thanks to all for your input.
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Re: 1967 corvette window cranks
Louis-----
There is no way that I know of to "tighten" these knobs in any sort of way that would leave the knob rotatable and functional. The knobs have an aluminum or zinc diecast shaft which is attached to the handle via "peening". Usually, when the knobs become "loose" that means that wear on the shaft has progressed to the point where the next "step" in the process will be for the knob to fall off. Later GM PRODUCTION and SERVICE handles, including those SERVICE handles for 1967 Corvettes, have a much better designed and more durable knob attachment mechanism.
The only way that I know of to repair your handles is to use one of the knob repair kits that can be found in the carded "Help!", "Motormite", or "Dorman" parts section of your local auto supply store. Using one of these knobs and the hardware that comes with it you can install a new knob on your existing handle. Unfortunately, there is no way to repair and re-install your original colored knob. If you select the "clear" replacement knob (both black and clear are available), you can try dying it to match the original color. These knobs are made of a plastic material which does, to some extent, "absorb" the interior dyes.
Keep one thing in mind, though: these knob repair kits are designed for REAL LOW BUDGET-type auto interior repairs. They will not be anywhere near as durable as the originals (which, really, weren't too durable, at all) and the certainly won't be anything like the current GM SERVICE part. Unfortunately, the current GM SERVICE part differs in some minor ways from the original handles. They're 100% functional, though, and the knob rotation (which adds immensely to the ease of rolling down the windows) is MUCH smoother than the original handles.In Appreciation of John Hinckley -
Re: 1967 corvette window cranks
Louis-----
There is no way that I know of to "tighten" these knobs in any sort of way that would leave the knob rotatable and functional. The knobs have an aluminum or zinc diecast shaft which is attached to the handle via "peening". Usually, when the knobs become "loose" that means that wear on the shaft has progressed to the point where the next "step" in the process will be for the knob to fall off. Later GM PRODUCTION and SERVICE handles, including those SERVICE handles for 1967 Corvettes, have a much better designed and more durable knob attachment mechanism.
The only way that I know of to repair your handles is to use one of the knob repair kits that can be found in the carded "Help!", "Motormite", or "Dorman" parts section of your local auto supply store. Using one of these knobs and the hardware that comes with it you can install a new knob on your existing handle. Unfortunately, there is no way to repair and re-install your original colored knob. If you select the "clear" replacement knob (both black and clear are available), you can try dying it to match the original color. These knobs are made of a plastic material which does, to some extent, "absorb" the interior dyes.
Keep one thing in mind, though: these knob repair kits are designed for REAL LOW BUDGET-type auto interior repairs. They will not be anywhere near as durable as the originals (which, really, weren't too durable, at all) and the certainly won't be anything like the current GM SERVICE part. Unfortunately, the current GM SERVICE part differs in some minor ways from the original handles. They're 100% functional, though, and the knob rotation (which adds immensely to the ease of rolling down the windows) is MUCH smoother than the original handles.In Appreciation of John HinckleyComment
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