Bulletproof damper install:
Break up dry ice into chips, place loosely in plastic storage bag. Wrap around crank snout. Let cool for 1/2 hour.
Put the damper in a pot of water on the stove, bring to a boil. Remove damper with oven mitts.
Remove dry ice from snout. Insert crank key. Slide damper onto snout. If damper is proper clearance (0.001"-0.0015" interference fit), damper will slide all the way on and "thunk" against the crank drive gear.
Note: interference fit dimension is critical.
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