Posted by Bob
on 8/25/2008, 4:13 pm
74.74.77.70
I have a 1962 Falcon station wagon with the 170 motor. It has about 134,000 miles on it. It has a draft tube to ventilate the crankcase. When the engine is idling, the fumes from the crankcase vapors drift out from under the car and are picked up by the heater in the cooler weather. When it is parked in the garage, the convection flow of air up through the draft tube and out the oil filler cap fills the garage with noxious gas odors. In an attempt to eliminate both of these problems, I decided to install a PCV valve. I purchased a valve cover with a PCV hole from Auto Krafters and installed it this weekend. I purchased a Mr. Gasket oil filler cap with a foam filter insert, and a new PCV valve from Carquest. I attached a 3/8 inch hose to the PCV valve and connected it to manifold vacuum through the aluminum adapter under the carburetor. I also plugged the draft tube to prevent outside air from flowing into it. With the engine idling, there is a slight vacuum at the oil filler cap and no vapors escape. However, if I put the car in Drive with the emergency brake set and then briefly rev the motor, crankcase vapors begin to flow out from the oil filler cap, so the PCV valve apparently cannot pass enough of the vapors to keep them from escaping. Looks like there is a lot of blow-by from the piston rings. I thought that I might be able to use a PCV valve from a 200 or 240 cube engine, thinking that they might pass more vapor. However, the parts catalogs indicate that all of the six cylinder motors use the same PCV valve. Short of an overhaul, is there any way that I can solve this problem? Thanks for any and all ideas.
Bob
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