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  1. #11
    Fuel Injected! spfautsch's Avatar
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    The bearing grease seals are what make them "airtight". Obviously this is less than optimal, but the distributor really doesn't need to hold much of a vacuum. The amount of air the check valves allow the intake to pull through it is fairly small. But if the inlet hose clogs or gets pinched it could put the opti under full intake vacuum and I would imagine that could cause problems.

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