valve cover venting
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valve cover venting
1965 F250 4x4 352... I have been reading this forum on how the passengers side is a PCV cap that goes to the carb..and the drivers side is a vent cap that goes to the air cleaner. I have gone with a modern 4 barrel carb and the new air cleaner does not have a vent hose port. This is the way it is set up now... any suggestions?
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From: Simi Valley, CA
1965 F250 4x4 352... I have been reading this forum on how the passengers side is a PCV cap 
that goes to the carb and the drivers side is a vent cap that goes to the air cleaner.
I have gone with a modern 4 barrel carb and the new air cleaner does not have a vent hose port. This is the way it is set up now... any suggestions?[/IMG]
that goes to the carb and the drivers side is a vent cap that goes to the air cleaner. I have gone with a modern 4 barrel carb and the new air cleaner does not have a vent hose port. This is the way it is set up now... any suggestions?
Right (passenger) side valve cover: Rubber grommet fits into hole in cover, smog valve fits into grommet, smog hose routes from valve to nipple on carb spacer plate.
Left (drivers) side valve cover: Oil cap has a nipple made as part of it, smog hose routes from nipple to elbow on air cleaner.
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From: AR
You need one hose going straight from your carb to PCV valve in one of your caps. Then the easiest thing would be to replace the other cap with a "breather cap" that is filtered and requires no other hoses.
You will need either a "twist type" or a "push in".....
Here is an example
Ford Racing Valve Cover Breather Caps M6766-NVBK - SummitRacing.com
Here is an example of the twist on style (similar to what I use)
http://www.summitracing.com/parts/pro-302-200/overview/
You will need either a "twist type" or a "push in".....
Here is an example
Ford Racing Valve Cover Breather Caps M6766-NVBK - SummitRacing.com
Here is an example of the twist on style (similar to what I use)
http://www.summitracing.com/parts/pro-302-200/overview/
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From: seattle
The pic Buzz posted is correct for the open crankcase vent system. This is the most common setup. The phenolic carb spacer has a nipple at the rear which has a preformed hose in a basic Z or N shape depending how you look at the hose...which plugs into the PCV hose at the rear of passenger side valve cover..the PCV has a 90 degree nipple vs a straight one. The LH cover has a twist in breather cap with 2 flat tabs that lock it in. Theres no nipple on it on open systems...just a series of small slots/holes around the underside of the edge as installed.
Closed systems are identical except the air cleaner has a nipple in the top portion off the domed front area which connects to the breather/oil fill cap which has a 90 degree nipple on it.
The type with the road draft tube use the open system type breather cap and the tube runs down the rear of the RH side of the engine at the bellhousing area. The road draft tube is also the gold as the the rest of the valve cover is.
- cs65
Closed systems are identical except the air cleaner has a nipple in the top portion off the domed front area which connects to the breather/oil fill cap which has a 90 degree nipple on it.
The type with the road draft tube use the open system type breather cap and the tube runs down the rear of the RH side of the engine at the bellhousing area. The road draft tube is also the gold as the the rest of the valve cover is.
- cs65
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From: colbert washington
The pic Buzz posted is correct for the open crankcase vent system. This is the most common setup. The phenolic carb spacer has a nipple at the rear which has a preformed hose in a basic Z or N shape depending how you look at the hose...which plugs into the PCV hose at the rear of passenger side valve cover..the PCV has a 90 degree nipple vs a straight one. The LH cover has a twist in breather cap with 2 flat tabs that lock it in. Theres no nipple on it on open systems...just a series of small slots/holes around the underside of the edge as installed.
Closed systems are identical except the air cleaner has a nipple in the top portion off the domed front area which connects to the breather/oil fill cap which has a 90 degree nipple on it.
The type with the road draft tube use the open system type breather cap and the tube runs down the rear of the RH side of the engine at the bellhousing area. The road draft tube is also the gold as the the rest of the valve cover is.
- cs65
Closed systems are identical except the air cleaner has a nipple in the top portion off the domed front area which connects to the breather/oil fill cap which has a 90 degree nipple on it.
The type with the road draft tube use the open system type breather cap and the tube runs down the rear of the RH side of the engine at the bellhousing area. The road draft tube is also the gold as the the rest of the valve cover is.
- cs65
Logistics Pro
Joined: May 2008
Posts: 3,670
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From: PHX AZ
Part numbers for ya
C5TZ-6758-B TUBE
377393-S GROMMET
Grommet size: 31/32 ID x 1 7/16 OD
Air Cleaner to Breather hose california only
I have original ford photo's that show the draft tube in place.
<center>
<img src="http://img.photobucket.com/albums/v513/CalypsoCoralBoss302/1965%20F250%20Deluxe%20Camper/Done%20Engine%20Bay/439f809b.jpg"><br/><br/>
<img src="http://img.photobucket.com/albums/v513/CalypsoCoralBoss302/1965%20F250%20Deluxe%20Camper/Done%20Engine%20Bay/d37502c6.jpg">
<br/><br/>
</center>
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Boss, first off..what a beutiful job you did on your truck!!!.. secondly..my valve covers have the twist lock type holes . Does this draft tube grommet go into these type of holes or would I need a stock valve cover?
Logistics Pro
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From: PHX AZ
Stock left cover the same but right cover just has a round hole in it to fit the grommet.
Logistics Pro
Joined: May 2008
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From: PHX AZ
Does not belong but its part of the truck's history and it seems to do something.
It was in great shape so left it.