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Discussion Starter #1
Hi, everyone. New to the site. I have a 2013 f250 6.7 powerstroke. Im getting oil in my vacuum system. Im thinking that when I shut the truck off the remaining vacuum is sucking oil from the vacuum pump. Does the vacuum pump have a check valve, if so its not working because i can suck air from the vacuum line back to the pump and get air. Any suggestions would be helpful.. Tim
 

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Call the dealer parts and ask them.
 

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I really just need to know if there's a check valve in the vacuum pump.....
That is a vane style pump, there is not a built in check valve that I know of
 

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Discussion Starter #6
Well. I spent the day removing the vacuum pump. It does have a check valve in intake nipple. I took it apart a found some debris in there. So I cleaned it out and it seems to be working fine now.
 
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