PCV hose
Mountain Pass
Joined: Mar 2006
Posts: 101
Likes: 1
From: Dayton
have you tried an auto parts store like napa or auto zone? they mite have what your looking for. if not, you mite be able to take a piece of 3/8 hose and a piece 1/2 hose, then use an adapter??? i don't know just a thought.
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New User
Joined: Mar 2006
Posts: 4
Likes: 0
I have tried auto parts stores and they don't have it. I have a 3/8" going into 1/2" hose now but, I'm not sure if fuel hose will stand up to the pressure for long, if it will colapse. I've heard there is a particular PCV hose that won't collapse to vacum pressure. Think I'm ok for a while, thanks.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
PCV = Positive Crankcase Ventilation. It is required if you want your engine to live and not have to change the oil every 1,000 miles.
Try some 7/16" hose. Fuel line can kink easily, try some light weight hydraulic hose.
Try some 7/16" hose. Fuel line can kink easily, try some light weight hydraulic hose.
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Cargo Master
Joined: Sep 2004
Posts: 2,691
Likes: 6
Call the dealer and get the part number and then go to genuinefordparts.com and enter that number. That will get you the original factory hose at half the price of the dealer. Or you can just rig it with some vacuum hose. The one for my 360 is $25 for a factory hose that's molded with bends in it but someone just took two pieces of straight hose and clamped them to a copper plumbing fitting with a 90 degree bend in it. It works great.
The PCV system provides ventilation for your engine so that pressure doesn't build inside of it. It sucks oily fumes from the engine block into the carb and burns them. The PCV itself is just a spring loaded ball-bearing check valve.
Good question. If you didn't have the hose there then pressure would build in the crankcase and remain at whatever pressure the PCV valve allows. This must not be good otherwise there would be no need for the valve in the first place. And if you don't have the hose you should at least plug up the hose connection at the carb. That would be a major vacuum leak.
The PCV system provides ventilation for your engine so that pressure doesn't build inside of it. It sucks oily fumes from the engine block into the carb and burns them. The PCV itself is just a spring loaded ball-bearing check valve.
Originally Posted by northey87
is the pcv hose reqired? what is the purpose of a pcv hose? not trying to steal the thread, im just curious.
Last edited by qman; Apr 19, 2006 at 11:25 AM.
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Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Originally Posted by idealtrucks
The hose can be plugged on the manifold and a breather added on the valve cover. DONT just leave the PCV valve in the hole, you engine will build up too much pressure.
Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
Thats true. A road draft tube essentially creates a slight vacuum and causes circulation. The old 30's model engines didn't have road draft tubes though. Thanks for catching me on that though, I didn't really think about the road draft tube. A PCV will help keep you engine cleaner inside.
Posting Legend
Joined: Sep 2001
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A breather or line from the air cleaner to one end of the valve cover with a PCV drawing air from the other end will keep fresh filtered air flowing thru the engine which carries off the organic vapors, acids, and moisture that would otherwise condense inside forming deposits, eating the engine alive. On a V8 the air is pulled in on one side and out the other. Remember to replace the PCV annually or every 10,000 miles. Just because a PCV rattles does NOT mean it is any good.
thanks for the info.
Logistics Pro
Joined: Apr 2005
Posts: 4,447
Likes: 0
From: Georgia
Originally Posted by hopk2517
Where can i find a PCV hose for 300 straight 6? 3/8 at the valve and about 1/2" at the intake. Junkyard?
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