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03-31-2002, 12:29 AM
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#1 |
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"TRUCKLESS"
Join Date: Jan 2002
Location: Tuscola IL
Posts: 457
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What is right
Someone told me I should put a vent on my valve cover. Someone else said that I shouldn't. They said you don't want to use a vent when you have a pcv valve. I don't know anything about this. What is right? Someone else suggested that the proper way is to put pcv valve on one valve cover at back of motor and vent on other valve cover at front of motor. Or does any of this even matter. Thanks a lot.
------------------ Mitzki5 69 GMC Shortbed Central, Illinois
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Mitzki5 No longer have an old truck! But always looking for another one! |
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03-31-2002, 12:32 AM
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#2 |
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Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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PCV on on cover,& a vent on the other cover. I would prefer to have the PCV at the front.......69 longhorn.
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http://community.webshots.com/user/hotrodhorn |
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03-31-2002, 12:52 AM
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#3 |
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Registered User
Join Date: Dec 2001
Location: NW Iowa
Posts: 952
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The PCV is the vent "Postive Crankcase Ventilation" valve if I remember correctly. No other vent wanted. That was the purpose of it - recycle crankcase fumes thru the carb.
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03-31-2002, 01:11 AM
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#4 |
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Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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It needs a vent on the opposite cover.....if you look at the stock setup,it has a PCV in 1 cover,& the other cover has a tube running to the breather. On the older than 68 setups,the PCV screwed into the carb,& had a hose to the rear of the block.....& had a vented cap on the fill tube.......69 longhorn.
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03-31-2002, 01:33 AM
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#5 |
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Registered User
Join Date: Jan 2001
Location: skamokawa, WA, USA
Posts: 527
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It needs a vent in one cover to let air into the crankcase. Otherwise the pcv will suck a hard vacuum in the engine at times.
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70 C10 long fleet, 355/200 4r, 6 lug disc conversion, 3" drop 70 gmc changed to 67/8 chevy, 454 with voodoo cam, th400, all 74 running gear.. in progress |
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03-31-2002, 09:20 AM
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#6 |
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Account Suspended
Join Date: Jan 2000
Location: Woodstock, IL
Posts: 7,020
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If ya look, I have a breather on the drivers side. Near the upper rad. hose. Then I have a hose running from the base of my carb, to the PCV valve on the passenger side. That's how I have mine set up.
 ------------------ http://hometown.aol.com/racedvl/racedvl69index.html Woodstock,IL.northwest of Chicago It's not what you buy, it's what you build!! I did not climb to the top of the food chain, to become a vegetarian. For some pics of my truck. [This message has been edited by racedvl (edited March 31, 2002).] |
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03-31-2002, 11:24 AM
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#7 |
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Recovering Truck Driver
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
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you need a vent with the pcv valve, or you're going to draw too much vacuum in the crankcase. If the valve covers were not designed for the pcv, you may want to find some that are, as you need an oil deflector under the pcv valve to prevent sucking oil up into the carb.
------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE
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67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska |
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