Re: Anyone put a PCV valve on a 706 or other tract

Posted by andy on November 09, 2003 at 19:22:16 from (69.66.62.101):

In Reply to: Anyone put a PCV valve on a 706 or other tractor. posted by Adam on November 06, 2003 at 16:04:22:

From my prospective you do not need a PCV valve. The crankcase is already vented to the outside. Blow-by from the cylinders pushes all of the water vapor and contaminates out. A modern car or pickup uses a "closed" crankcase ventilation system. Like you are thinking a car has a hose from the valve cover to the intake manifold which sucks blow-by combustion products back into the cylinders to burn them again. This was actually done to clean up engine emisions by making it more of a closed system. The PCV valve does nothing but to act as a "one-way" valve or "check valve" to keep fires or explosions from occuring in the valve covers/crankcase should the engine backfire up into the carb. If you get the engine warm enough water vapor will mix with the blow-by and be exhausted out of the tube. The engine should warm up fairly quickly even without a load. I have a 706 gas and I believe the blow-by tube is on the operators right hand side attached to the tappet cover and discharges behind the side rail. Just my thoughts. Goodluck.

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