Is there any way to clean a vacuum check valve?? I can blow throough it, but just barely.

 

They are inexpensive, just replace them if they aren't working properly.

You should only be able to blow straight through in one direction. You shouldn't be able to blow through the other direction, but you should be able to suck air through (act like a vacuum).

 

They're actually pretty hard to blow through, when you're blowing the right way. They're like this brand new. Obviously, you can't blow through it the other way.

 

They should not be hard to blow through. You can get them at the auto parts store in the help section, don't ask the guys behind the counter cause they will tell you it's the lifters!

oh ya, do NOT try to clean them.

 

I remember that they are hard to blow through . Garfinkle cleaned 10 or 12 one night while I was there , those cars are running still so I know it works . He sprayed carb cleaner in them then air under low pressure. One split open where the green and white was glued together, there is a filter in there that makes it hard to blow through.