jag1886

Did you stick a nail or a small screw driver up the drain valve to make certain it's clear. I had nothing was coming out of my catch can and found the valve have some coagulated crap in the bottom of the can plugging it up when I cleared it the can was almost half full..

RLXXI

The nature of engine operation, heating, cooling, circulation of oil etc all create pressures, albeit low pressure but even still it has hydrocarbon gasses that cannot be just dumped into the atmosphere, as well as preserving oil seal integrity, (plug up your pcv tube and see how long the rear main seal lasts).

The same reason why fuel systems are operated in a pressure/vacuum environment and any excess fuel (hydrocarbons) are absorbed into the charcoal canister and vented thru the purge valve directly into the intake manifold so they can be burned as much as possible.

If you want any more information use google, it's all out there for the taking one only has to search.
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jag1886

Properly broken in engine = no blow by = no catch can. Which tells me the op's engine was broken in properly.

Man some people have no idea whats going on inside a crankcase.

You do know there is as much air moving under the pistons as on top, plus all the moving parts beating and churning the oil, there is always blow by on any engine, some have more than others.

I would bet the drain valve is plugged or one or both of the one way valves in the system is non funtional.
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RLXXI

I'll address this one part of your statement. I've been building engines for close to 40 years, I know full well what's going on inside the crankcase. A normally operating engine that IS properly broken in will have a minimal amount of PCV gasses. No where near enough to warrant an aftermarket catch can.

If it was required, Ford would have incorporated them into the engine design. Suggest you put your brain into gear before you put your mouth into motion.
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acdii

I dont think you know what you think it means

Old Grey Mule

Race truck drivers apparently don't need to know how engines operate.

1 Alibi 2

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It's up to the truck owner if they want " PCV gasses " going into their intake. Lots of things get put on trucks that aren't " required ", this is just another one of those..
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RLXXI

ROFL yeah like aftermarket CAI.

Thanks for the laugh.
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Shane803

Hasn't Ford made and installed oil/air separators on some vehicles? Do they assume people will not break their vehicles in right?

Shane803

Are you stating water vapor is then going back into the air/fuel ratio? That sounds like a terrible idea if so.