I have seen a few post about blow by, crankcase pressure and etc. How can you tell what is what? Maybe someone can post and give a answer to this so people don't get confused.

For Example, my car is running great, and really strong. When I remove my oil cap I feel a lot of air coming out of the cap? At first I thought this was a bad sign, but I was told this was normal. Would this be classified as blow by, positive crankcase pressure? Obviously some people may take this as a bad sign, but yet it's just a normal thing the motor does. So what's your take on this?

Thanks!

 

Just watch out for signs of excessive crank case pressure.... You probably know what they are right? Monitor oil levels a little blow by is normal.

 

Excessive blow-by causes higher crankcase pressures. You can never have enough crankcase ventilation with a turbo Honda engine.
Alot of air movement and vapor out of the oil cap while running is pointing to some extra CCP (crankcase pressure). Visually compare it to another n/a Honda engine.