I finally got my 312 running after a year of working on it. I drilled and tapped the block in one of the bell crank mount holes to 1/4" pipe thread as recommended in a post here to install a pcv valve. I had questioned whether a baffle was needed and was told NO. The engine sucks so much oil thru this line that it fouls spark plugs in less than 5 minutes. Any ideas what I can do to correct this?   Dave V

SE Wis

Ok that's the first time Ive heard about going through the bell crank hole?? Usually they are placed in the rear quarter of the valley pan cover, and Im sure the factory ones have a baffle cover over the area..



"Came too close to dying to stop living now!"

As far as I know, the rear valley cover PCV setups all had a baffle setup. And Mummert's new valley covers with the PCV option, have a full baffle. However, as a check, since you say you just got the engine running, might it be an idea to disconnect the PCV, plug the vacuum, clean the plugs & see if the trouble still persists, just to make sure something else isn't amiss?  


Paul

Paul   I did plug the PCV to narrow down the cause of the plugs fouling. Runs perfect with it disconnected. The inside of the PCV hose was oil soaked also. The engine used 3/4 qt of oil in 25 Minutes of breakin.  This idea to tap the block in this location did come from a post on this site a couple of years ago. I tried searching for the post but my search function isn't working.  I guess I'm going to have to pull things apart and install it in the valley pan. Bummer!    Thanks for the replies though.  Dave V.

SE Wis

There seems to be mixed results in putting the PCV valve in that particular location without the use of a baffle.  Here’s the link to the thread about putting the PCV valve in the bell-crank location at the top of the block.

http://forums.y-blocksforever.com/Topic24835.aspx

Lorena, Texas (South of Waco)

One thing to check is to be sure that the threaded side of the PCV valve is the intake.  I have two here that have been recommended for the approach that  that you are taking, but on cose inspection, turns out the threaded connection is the outlet.  Intuition tells me that if the PCV valve is  backwards there would be less suction, but stranger things can happen.


Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

Thanks Ted for finding that original post. What I have is a threaded valve that does flow the wrong way so I have it screwed in to the back of the carb spacer and a 1/4" pipe nipple in the block connecting this with a rubber hose. In that original post there was an article that states to only install a PCV valve in a vertical position. I think I will need to start over and use the valley pan installation design.   Thanks for the help   Dave V

SE Wis

Since we're on the PCV subject.. I've tried to find a good used rear vent style valley pan in western Canada, without success. A thought has occurred to me, does anyone know if that style of valley pan was ever used on any Canadian Y-block engines, other than early T-Birds?  Thanks..


Paul

Have you checked '63-'64 pickups? That style was used in the states for those years.


Marc

'54 Merc ragtop

Pt Townsend, WA