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      06-14-2019, 11:08 PM   #1
X5Mjet
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Drives: X5M
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X5M E70 PCV CCV help catch cans

Hi guys,

Im in the process of re plubing my entire PCV/CCV setup and a couple things are puzzling me.
So what ive worked out is the lower hoses that come up both sides are VAcuum lines when idling (but do these see boost pressure also? Are they from the intake manifold?)
Now the thing that is puzzling me is these both join to the right hand side (facing engine) and they both have a check valve (built into the plastic Y pieces) so i cant for the life of me work out there purpose. Because the CCV will never see the vacuum due to the check valves. (Or is my check valve stuffed and they should see vacuum but not boost)

Please help.
Appreciate 0
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