Sorry, but no sealing of opti will prevent water & oil intrusion. Thing to save opti when water pump seal goes bad is to drive a fitting into wp weep hole. Seal around fitting. Attach tube to fitting and route tube away from opti.
Other thins to help save opti include, never washing engine, & not driving car when it rains or snows. Also, replacing all oil seals on timing cover will help opti live longer.
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