I just put my pump online for the world to see, Man am I red in the face. :paranoid: :tapemouth

What is the name on the top of your fuel pump? That might help if I ever come across one

Using the thumbnial above I've added an arrow to indicate where the breather is on the pump of the '73.

Looks like Nissan used different pump types!

edit:

Doesn't look like this worked either....

For some reason I cannot see your pointer If you could show me with your finger or pointer on one of your own pictures I could be more help.

P.S. I just noticed your in australia.lucky you.

JZM

Using the thumbnail again.

From the "breather" hole drop a vertical down to halfway on the pump casting.

Then place a horizontal line and imagine a breather about the same distance as the vertical drop.

Sorry I can't do any better, no digital.

Will check out the name etc on the pump tonight and post tomorrow.

MOM

What is the name on the top of your fuel pump? That might help if I ever come across one

Name on top is ATSUGI,

I had thought it was the OEM, now I'm not sure what OEM was!!!!!

It certainly differs from your pump, in so far that the casting is integral with the bottom diaphram.

I'll try again with a thumbnail highlighting the differences.

atsugi.bmp

Now I can see!Is that where your leak is? if so than cleaning any sludge build up may help you.unless something is causing exc. crankcase pressures.

My pump for my 73 [still in nissan part box]is a nikki unit and has no breather holes.nissan used several pump manufactures and just reboxed the product.

JZM

There aren't any obstructions to the emmission system, I guess it was just a blockage of some description, possibly a varnish buildup?

In reality I'll probably never know.

HIH others who "think" they may be experiancing a pump failure....