Pcv valve elbow to one way

[Shabah180]

Hey fella's! Little bit of a late start for me this year. Hope your all having fun on the water!
My '95 350 has the "straight line" elbow pcv valve that vent to the carb. Am i able to upgrade to the valve that has the one way check valve that only releases pressur/ blow-by as needed?

Thanks!

 

[Bondo]

Ayuh,.... It's just a vent, not a pvc,.... No reason what so ever to change it,....

 

[Shabah180]

Ayuh,.... It's just a vent, not a pvc,.... No reason what so ever to change it,....

Heya bondo! It was more for preventitive maintenance as part ad my tune up. It seems to come up now and again people notice oil on the valve cover where the pcv valve ( is it postive crankshaft valve?) bushing is seated in the valve cover. Apparently, the old engines have that elbow, which is just continuous line to the carb in hopes of re burning the gasses. The new ones have a one way check valve ive read, that releases as needed. But, another moving part means it can get stuck and fail.

Bondo, lastly, i know you need that for engine to breath. But do you need it to go to the carb? Inguess im asking is theres another option that eliminates the rubber fitting, valve to carb.

Thanks!

 

[Scott Danforth]

Its supposed to be a free vent to atmosphere and its on all I/O and inboard boats.

A PVC valve requires positive ventilation (high manifold vacuum)

Since marine motors do not have high manifold vacuum like cars, since unlike cars, they are under constant load, its the only way for marine motors to purge crank case gas is to plumb the crank case vent to the air inlet (spark arrestor) and not restrict it with a check valve. Hence the open fittings

If you dont bring the explosive blow-by gasses to the carb to be inhaled and burned, you would fill the bilge up with oil vapor and oil. Worse, if you put automotive pvc valves in place, there is no vacuum to open the check valve and blow by pressure rises, and blows out seals and gaskets.

Oil vapor is explosive, and oil in a bilge can be pumped out if the bilge pump runs which is environment polution and is fineable

Leave the system alone as it was designed

 

[Shabah180]

Its supposed to be a free vent to atmosphere and its on all I/O and inboard boats.

A PVC valve requires positive ventilation (high manifold vacuum)

Since marine motors do not have high manifold vacuum like cars, since unlike cars, they are under constant load, its the only way for marine motors to purge crank case gas is to plumb the crank case vent to the air inlet (spark arrestor) and not restrict it with a check valve. Hence the open fittings

If you dont bring the explosive blow-by gasses to the carb to be inhaled and burned, you would fill the bilge up with oil vapor and oil. Worse, if you put automotive pvc valves in place, there is no vacuum to open the check valve and blow by pressure rises, and blows out seals and gaskets.

Oil vapor is explosive, and oil in a bilge can be pumped out if the bilge pump runs which is environment polution and is fineable

Leave the system alone as it was designed

I will do exactly that! Thanks. I was misinformed, thats why i always get a second opinion. Thanks guys.

 

[Shabah180]

Sorry bondo/ fellas, i jumped the gun before reading the countless threads on this topic.
Admin- if you wish to remove this its fine no need for a 10001 vent tube threads, ive read enough to know for sure to leave it as it was intended to be as a marine engine application.
Learned to clean my flame arrestor though!! Haha!
Thanks again.