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Reason for Check Valves in Engine Oil Filters
 
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Question:
Reason for Check Valves in Engine Oil Filters
What is the function of a check valve in engine oil filter?
-- Shafeeq Bandagi, Bloomfield Hills, MI
Answer:
The check valve function is used to prevent dry starts that could occur if the filter was allowed to drain dry during standing. It also serves to ensure that oil is always present in the filter, especially when the vehicle is started.
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