A little update how I solve this. First I made a aluminium piece in my lathe, and have it welded into the carburator spacer. Then I made another in steel, that I also drilled out in the back, so it didnīt came out too heavy, with a tight slightly coned end to get a nice fit and pressed that in gently and to avoid leak, and gave it a few spot welds to keep it in place. ( The part that goes into the manifold was not possible to take out, so this was my only option ) In between, I placed the PCV valve. Pretty easy installation. Hope to get less fumes while driving as well as less oil on the garage floor
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Would it make sense to plumb this into the air cleaner housing instead of using the carb spacer?Comment
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Anders, which direction does the arrow point (on the side of the PCV valve)? Did you push the hose over the threads on one side of the valve? Rockauto.com sells PCV valves that have push-on hose fittings on both sides. One example is the, STANDARD MOTOR PRODUCTS Part #V112. This valve goes on a 1978 Pontiac with a 350 cubic inch engine.
Marcelo, using the air cleaner is a 'passive' vent system that doesn't use a PCV valve. It is still another good way to reburn block gasses. They usually come off the valve cover with a cap that has a hose connection and it leads to the side or bottom of the air cleaner. I like the kind with the small filter on the inside of the air cleaner to trap oil and solids. Even though the passive system doesn't work as well, I really like it because it never messes with the fuel mixture. - DaveMember, Sons of the American Revolution
CLICK HERE to see my custom hydraulic roller 390 FE build.
"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
From: Royal Oak, MichiganComment
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Anders, which direction does the arrow point (on the side of the PCV valve)? Did you push the hose over the threads on one side of the valve? Rockauto.com sells PCV valves that have push-on hose fittings on both sides. One example is the, STANDARD MOTOR PRODUCTS Part #V112. This valve goes on a 1978 Pontiac with a 350 cubic inch engine.
Marcelo, using the air cleaner is a 'passive' vent system that doesn't use a PCV valve. It is still another good way to reburn block gasses. They usually come off the valve cover with a cap that has a hose connection and it leads to the side or bottom of the air cleaner. I like the kind with the small filter on the inside of the air cleaner to trap oil and solids. Even though the passive system doesn't work as well, I really like it because it never messes with the fuel mixture. - DaveComment
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Look very close for a 'flow arrow'. Your installation is correct if you tried blowing hard into the hose end, and flow stopped going out the threaded end. This is to prevent carburetor backfire from injecting raw fuel mixture into your block. So, one safety function of this valve is to work just like a 'check valve'. In the old days, mechanics would shake the valve. If the pindle inside rattled, they considered the valve as 'good'. Not so... there is also a spring inside that can break. The spring's job is to 'center' the pindle. The only way I know to test the PCV valve is by blowing into each end.
This may be a stupid question but if the inlet has threads, why not screw it directly into your intake manifold? Then, you would only need one hose.
I was looking on rockauto.com for the PCV valve you used but could not find it. Instead, they show:
STANDARD MOTOR PRODUCTS Part #V100
That probably means YOUR part, the one made in USA, is the LAST one in existence and it was overtaken by the CHINESE V100 version. (That has been the trend for decades over here.)Member, Sons of the American Revolution
CLICK HERE to see my custom hydraulic roller 390 FE build.
"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
From: Royal Oak, MichiganComment
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Look very close for a 'flow arrow'. Your installation is correct if you tried blowing hard into the hose end, and flow stopped going out the threaded end. This is to prevent carburetor backfire from injecting raw fuel mixture into your block. So, one safety function of this valve is to work just like a 'check valve'. In the old days, mechanics would shake the valve. If the pindle inside rattled, they considered the valve as 'good'. Not so... there is also a spring inside that can break. The spring's job is to 'center' the pindle. The only way I know to test the PCV valve is by blowing into each end.
This may be a stupid question but if the inlet has threads, why not screw it directly into your intake manifold? Then, you would only need one hose.
I was looking on rockauto.com for the PCV valve you used but could not find it. Instead, they show:
STANDARD MOTOR PRODUCTS Part #V100
That probably means YOUR part, the one made in USA, is the LAST one in existence and it was overtaken by the CHINESE V100 version. (That has been the trend for decades over here.)Comment
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There are two types of PCV Systems, OPEN (early) which used the oil filler cap with filter as the crankcase fresh air inlet, and the later CLOSED System (late) which sourced fresh air from an enclosed air cleaner assembly (to prevent reversion crankcase fumes from entering the atmosphere).
Just having a hose from the rocker cover to the AC ASM without a PCV valve only allows crankcase pressure to escape and not burn the vented fumes through the ignition process.
An engine has to have either a ROAD DRAFT SYSTEM or a POSITIVE CRANKCASE VENTILATION SYSTEM.
What you did is clean and simple, although I would try to find a PCV valve with nipples on either end. Also, this requires special hose which is PCV rated (FORD Basic PN 6A664) for vacuum/suction and able to withstand crankcase fumes without deteriorating.
BTW- Valves are calibrated to the design flow rate of the system. Orifice size chosen can upset designed carburetor balance.Comment
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There are two types of PCV Systems, OPEN (early) which used the oil filler cap with filter as the crankcase fresh air inlet, and the later CLOSED System (late) which sourced fresh air from an enclosed air cleaner assembly (to prevent reversion crankcase fumes from entering the atmosphere).
Just having a hose from the rocker cover to the AC ASM without a PCV valve only allows crankcase pressure to escape and not burn the vented fumes through the ignition process.
An engine has to have either a ROAD DRAFT SYSTEM or a POSITIVE CRANKCASE VENTILATION SYSTEM.
What you did is clean and simple, although I would try to find a PCV valve with nipples on either end. Also, this requires special hose which is PCV rated (FORD Basic PN 6A664) for vacuum/suction and able to withstand crankcase fumes without deteriorating.
BTW- Valves are calibrated to the design flow rate of the system. Orifice size chosen can upset designed carburetor balance.
EDIT: This is where I first found it http://www.parts123.com/parts123/yb....~~~~~~0000051d
Then, I order this item from a vendor here in Sweden( http://www.norrlandscustom.se/ ) and got the one one I now have, that suppose to be the same.Last edited by Anders; September 14, 2012, 03:17 PM.Comment
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You should be OK then on the hose type-
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...EDIT: This is where I first found it http://www.parts123.com/parts123/yb....~~~~~~0000051d
Then, I order this item from a vendor here in Sweden( http://www.norrlandscustom.se/ ) and got the one one I now have, that suppose to be the same.Member, Sons of the American Revolution
CLICK HERE to see my custom hydraulic roller 390 FE build.
"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
From: Royal Oak, MichiganComment
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I payed..................................................like, and hold your hat now, around 30 dollar here. But I usually donīt buy from Swedish vendors. Only if Iīm in a hurry and canīt wait. Iīm quite lucky as we have a office in Camarillo, Ca, and I pretty much always buy my parts from US and have them send it to the office, and then someone brings it over as we have people going back and forth most of the time.Comment
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