how do i remove/rerout the crankcase breather on a 292 Y block?

 

Are you talking about the pipe down on the side of the block? Or, are you up around the air cleaner?

Welcome to FTE!

 

its the tube on the lower left hand side of the block. it leaks despite cleaning the canister and changing the screen.

 

Remove the canister, and the rest is held on with two bolts.

 

I understand how to remove it, how do I replace its purpose of providing the airflow?

 

You would need to install a correctly functioning PCV system in its' place.I recommend visiting the Y-Block Forum on FTE for advice on how to properly install one.

That leak,while annoying and frowned upon in todays' more environmentally-conscious world,is normal - sort of.The intent was to vent crankcase fumes,while going down the road at relatively higher speeds.The reality,though, is different than intended. "Marking your territory" is part of the Y-Block experience.Embrace it.

 

Like the man said she is just marking her territory. Y-Blocks, Harleys. Flat heads among others. Of them it's been said if she isn't leaking oil she don't run.

 

Did you replace its gasket? Are you even aware there is one? Prolly not after I've read what you've said. If there's no gasket, you're gonna have an oil leak.

C1AE-6870-A (replaced B5S-6870-A) .. Crankcase Ventilation Tube Gasket / 1 3/4" O.D. x 1 1/4" I.D. ~ 1/16" thick / Obsolete

GREEN SALES CO. in Cincinnati OH has 37 = 800-543-4959.

 

i have tried changing the filter twice. still leaks

 

As the engine runs it get vapors in the crank case that if not vented in some way can be corrosive to the internals. The vent tube is designed that when you drive the air blowing over the end of the tube creates a vacuum on the crankcase. It pulls fresh air in through the oil fill cap and "exhausts" the vapors out the tube. When you shut down the engine the vapors cool, then condense and drip. If you have a worn engine with lots of blow by, this get worse.

A PCV valve used the engine vacuum to suck on the crankcase, the oil fill cover is still the inlet and the vapors get burnt and exhausted out the tailpipe. No more drips. The system is fairly simple but you need a good vacuum source.

I replaced mine with a PCV valve. I removed the tube assembly, cut the tube off, made a rubber grommet that would accept a PCV valve and I had a good vacuum source from my new Edlebrock carb. I also replaced the oil fill cap with a new one with a nice clean filter. Works fine, I will try to take a few pics tonight after work for you.

At one time there was an aftermarket conversion kit, I have seen them on eBay, but it is easy either way.

Hope this helps.

 

Walston,

Thanks for the info. i would appreciate some photos if you can and i'll also look on ebay and see if i can find anyhting. good looking truck in your photo.

 

PICS:

Vacuum source on the carb. Oil Fill Cap (vented), PCV Valve where tube used to come out.

 

Walston,

thanks for the photos. I have a vented oil filler cap already. so it looks like you put a pcv valve inline from the old attachment point on the block with a vacuum hose attached going to the carb, is that correct?

 

Yep, that is it. Where I removed the vent tube from the part that attaches to the valley pan, I put a rubber plug with a hole in it that the pcv valve sticks into. Then I blolted it back on the valley pan.