Sailhog,
It's the principle of metal contracting when cooled...if you were having trouble getting a rusty nut off you would heat it. I think John is refering to the metal casing holding the seal...they are a tight fit but if cooled slide just that little bit easier.
__________________
Mo
"Odyssey"
1976 C&C 30 MKI
The pessimist complains about the wind.
The optimist expects it to change.
The realist adjusts the sails.
...Sir William Arthur Ward.
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