how to soften cork

OLD AS I

Senior Member
Am about to connect transmission to drive shaft, ('46 59 engine) the cork seal that goes in the 2 piece cap for the universal joint, its perhaps 3/8" x 1/4", am afraid to bend it, what can be used to soften the cork material, light oil, heated water, steam, heated oil ????
 
I recently replaced the cork halves massaged a little heavy oil into them all up and running now no issues
 
Old Henry
Yes, thanks, have sets from Drake and feel they are fairly new, just would like to take that extra step. Also am in Canada and getting items from the US doubles in cost when taking in to consideration shipping, duties, currency exchange, brokerage fees and the time for shipment.
 
I know that there are folks who swear by the traditional cork seal and there are those who swear at it. Since my rear end is out I checked the cork seal which had been in place for about 48 years and found it to be whole and in place but, very brittle and no longer "swelled up" for maximum sealing. Wish there was a way to reduce Canadian costs. There's a blue O-ring style neoprene seal on Ebay that has good reviews.
 

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When I installed the cork seals, I soaked them in engine oil.

Another item to observe is that back many years ago, the cork seal was shaped with two sides longer than the other, not square. This shape allows the cork to form better between the clam shell and the ball shaped part of the drive shaft. I have them in my car over 20 years and no leaks. Just my 2 cents worth.
 
I use vaseline on the cork joints on my horn (oboe) and it keeps them in good, pliable condition. It doesn't last too long, though. I'd think that the lubricant that's being sealed in would keep the cork pliable after installation.

If there is a modern rubber seal material that fits, that would be a better bet. I expect the amount of sitting some of these cars do would tend to let the cork dry out.
 
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