Ok So i am rebeuilding my 1971 Datsun 240 and I cant figure out where one line on the balance tube goes? I plugged it But i think it needs to be going to something. I replaced the od stock air filter with new K&N air cleaners. The hole on the balance tube that I have no clue where it goes is in the middle and it kinda points downward and it sucks in air. I currently have it plugged. Should i run it into the valve cover since the valve tube is not going to anything? (I have a K&N breather on the valve cover right now) Or should i keep it plugged? Another thought was does it go into the block? The block opening is bigger than the opening on the balance tube? It would have to be a custom hose If i run it into the block?

Anyhelp would be great

Keith

Is it the one for the PCV valve? How big is the fitting?

can you get a picture on here for us to see?

Sounds like the pcv valve to me, but a picture would be helpful.

There should be a pipe extending out from the block and it makes a 45* turn and is reduced in size . There should be a hose of about 5/8 inch inside diameter that they connects to the opening in the balance tube . a PVC valve must be installed in to this hole and the hose connected . If you just plug the block breather hole the engine will sludge up badly . The OEM air cleaner with a K&N filter actually will produce more power than the individual ones. May not look as cool though , also the valve cover vent line you now have a little filter on , you will likely find will leak fumes into the passenger cabin . You will also notice that there is a fresh air supply line just below the ignition coil you will need to figure out a filter for that . Other wise dirt and dust will be drawn into the fuel tank . Gary:rolleyes:

OK I am going to get some pictures tomorrow and post what i got........

okay so i forgot to get some pictures today but there are two inlets into the balance tube that are in the middle of the tube. I plugged the one that is on the left and the other one that is right under the linkage arm is the other one that i have currently plugged.........Should i be plugging these?

ok it is #35 in the picture........where does it go?

Yup, PCV valve. Big formed hose goes to the block breather under the distributor.

Makes sense thanks a bunch everyone.