201fireman 12 Posted January 8 Share Posted January 8 So I swapped my SBC to a 489 recently. Right now it has two breathers in the valve covers with filter elements. What direction have you guys gone for crankcase ventilation? It is smoking a little from the breathers so I know I need to do something. Quote Link to post Share on other sites
Rancid87 27 Posted January 8 Share Posted January 8 A PCV valve is the way to go if your valve covers have good baffles. MC1of80 1 Quote Link to post Share on other sites
Leghome 342 Posted January 8 Share Posted January 8 On my SBC I have a PVC valve on one side and the other to a port under my carb. Quote Link to post Share on other sites
201fireman 12 Posted January 9 Author Share Posted January 9 Ok, and on the other side just a regular breather? Quote Link to post Share on other sites
Rancid87 27 Posted January 9 Share Posted January 9 Yeah, a breather on one side and a PCV on the other. Quote Link to post Share on other sites
201fireman 12 Posted January 17 Author Share Posted January 17 Ok Thanks. I have done a little research on it and will do more but this helps. Thanks! Quote Link to post Share on other sites
snomobeelr 33 Posted January 19 Share Posted January 19 Same , Breather on Passenger side, PCV on Drivers side. 201fireman 1 Quote Link to post Share on other sites
wallaby 51 Posted February 15 Share Posted February 15 You can go 1 step further and run a 1/2" hose from the breather location and route it to the underside of the air filter housing (inside the filter ring). This way at full throttle, there is enough vacuum available inside the filter ring to draw away the fumes that would otherwise escape through the breather into the engine compartment. At slower engine speeds, the flow reverses, and filtered air is supplied from the air cleaner, then travels through the crankcase to the PCV valve side. I found a neat "breather looking" item from summit that has a PCV valve inside. Looks like the fancy breathers, but with a tube coming out the side that leads to the base of the carb. sbarnette and 1Bad454 2 Quote Link to post Share on other sites
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