PCV breather debate

[Stymee]

We ran those setups on our race car back in the day, it does work and seal the rings using the exhaust pulse....Plus removes contaminants to the environment and not back into your engine

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[Reddevil5.0]

There is only one check valve on passenger side. Yes, you want to pull that out. Small flat head and pop out spring and plunger.

Do I put the small little end piece back on?

 

[Dmkpit401]

When doing breathers you gut or remove the PCV valve. At that point it is literally just a hole in the top of the crankcase that the pressure can easily escape through. No need for vacuum to pull it out when it can escape through an open hole IMO, the vacuum setup is just for emissions so the oil vapor/gasses don't go into the atmosphere.

Only thing when using breathers is you need to keep up on cleaning them or they will build up oil and drip on your valve covers.

according to ford tech pcv system helps seal rings

 

[GregO]

according to ford tech pcv system helps seal rings

This is true.
Hard core drag racing engines use a vacuum pump, there’s extra Horsepower to be had.

Here’s a great bedtime story for everyone;
https://en.m.wikipedia.org/wiki/Crankcase_ventilation_system

 

[Boosted21]

When doing breathers you gut or remove the PCV valve. At that point it is literally just a hole in the top of the crankcase that the pressure can easily escape through. No need for vacuum to pull it out when it can escape through an open hole IMO, the vacuum setup is just for emissions so the oil vapor/gasses don't go into the atmosphere.

Only thing when using breathers is you need to keep up on cleaning them or they will build up oil and drip on your valve covers.

Isnt this a problem? Without a check valve you’re just allowing unmetered air into the crankcase.

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