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PCV query

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Old Apr 5, 2002 | 12:37 PM
  #1  
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PCV query

hi
i see a lot of people here talking about having a PCV system hooked up. as long as i had my trucks, i NEVER ran a PCV--ever---i just ran 2 open breather caps which vented the vapors directly to the atmosphere...am i hurting my engine by running it this way?
thanks
ben
 
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Old Apr 5, 2002 | 01:24 PM
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PCV query


Cough ! Cough ! Cough !

No.


[i][font color=blue]Dennis[/font][i]

[font color=red]Calgary,Alberta,Canada[/font]
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[font color =green] Please Don't Ask Me Any Tough Questions,
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[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
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64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
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Old Apr 5, 2002 | 02:31 PM
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PCV query

Yes, you can be. One of the natural by-products of combustion is water. This can form condensate in the crankcase, because there is always a certain amount of blow-by past the rings. The water can form an acid in the oil and be hard on the bearings. Plus there is always a little fuel that gets by the rings too. This can dilute the oil over time. All this stuff floating around in the crankcase can for the most part be sucked out and burnt by the engine if the engine is run at normal operating temperature and a PCV system is used. The PCV system will actually evacuate the crankcase, and pull fresh air in to replace the vapors. The PCV system is a good thing, and will not hurt performance if the carb was originally designed for it.
 
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Old Apr 5, 2002 | 03:55 PM
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PCV query

well i dunno about the enviroment but it adds extra pollutants into the air which we breathe
 
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Old Apr 5, 2002 | 10:38 PM
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PCV query

I found this at the Hastings filter site.

If the PCV system is not functioning, the motor oil will quickly become contaminated and heavy sludge accumulations will begin to form. Internal parts, not protected by the motor oil, will begin to rust and/or corrode due to the water and acids that will become trapped within the crankcase.



Larry





http://www.hastingsfilter.com/engineering/tsb_94-2r.html
 
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Old Apr 5, 2002 | 11:06 PM
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PCV query

Good call guys !

I was out to lunch probably because I was thinking
race engines don't have PCV v's


[i][font color=blue]Dennis[/font][i]

[font color=red]Calgary,Alberta,Canada[/font]
http://www.clubfte.com/users/mil1ion/Minimorleytruck.JPG




[i][font color=green]
http://www.clubfte.com/users/mil1ion/Mil1ion.html [/font][i]

[font color =green] Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [/font]



[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon [/font]

 
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Old Apr 8, 2002 | 11:16 AM
  #7  
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PCV query

But a lot of dragster engines have a hose running from the valve cover to the collector on the header with a backfire valve. I assume this siphons off the crankcase vapours into the exhaust???
 
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Old Apr 8, 2002 | 08:08 PM
  #8  
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PCV query

>But a lot of dragster engines have a hose running from the
>valve cover to the collector on the header with a backfire
>valve. I assume this siphons off the crankcase vapours into
>the exhaust???

Yes, but this is to create a vacuum effect in the crankase to aid in ring sealing and squeak out that last tiny bit of horsepower - very bad idea for many reasons on a street driven vehicle.

Bruce in South Carolina
1977 F-100 Ranger XLT
1984 Volvo 245 Turbo - it's a Ford now!
 
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Old Apr 8, 2002 | 08:23 PM
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PCV query

 
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