Replacing Vent Line hoses

[kmack]

This was taken from a thread posted awhile back.

http://www.classiczcars.com/forums/showthread.php?s=&threadid=1309

Go ahead and replace the hoses.

And do not use heater hose. I used that initially, but still had to replace them a few years down the road. The fuel vapors will harden the heater hose and cause it to crack, causing leaks.

The only 2 hoses I've ever seen that needed to be replaced are the long 1/2" hose and the 5/8" hose w/ 180 degree bend. The short 1-1/4" hose from the filler neck to the expansion tank typically is fine. (I've looked at over 10 cars in junk yards and on everyone of them this hose was fine.) The 1/2" & 5/8" hose can be bought at any NAPA store for around $1.25 per foot. Not bad, but not cheap. Make sure you get the fuel line grade hose.

I bought 5' of the 5/8" and 8' of the 1/2" hose when I did mine just to be on the safe side. To make the 180 degree bend you'll need a piece if 1/2" OD steel tubing (preferrably stainless) about 6" long. (Do not use copper tubing! The fuel will degrade the copper over time and could ruin your fuel system.) You can probably find a place that sells this (plumbing shop would be a good place to start) and they'll most likely be able to bend it for you. I used a bench mounted vise. Painfull and time consuming, but it worked. Once you have the tubing bent, just slide it in the 5/8" hose and hook it all up. It's pretty easy from there.

While you're at it, you might as well replace the 3/8" hose going to the hard fuel lines and to the carbs if they haven't been changed already.

Good luck and don't forget to drain the gas tank! It's amazing how heavy about 8 gallons of gas feels when it's sitting on your chest! Don't ask....

[Inf]

Cool, this is something I need to do. Your post put it in easier to visualize terms than posts i've seen before.

Did you happen to take any pictures?

What did you do about the holes where the hoses come through the floor? I thought i'd read someplace that the grommets were NLA

[kmack]

Sorry, I didn't take any pictures of my install. Should have. The hardest part is putting the filler neck back in the tank.

As for the grommets, I couldn't find any when I did mine, so I used black eletrical tape. The thick stuff that's almost like rubber itself. Take that and wrap it around the body extension and the hose really, really tight. Do that a couple of times. Makes for a really good seal. So far, mine has been holding well for the last 2-1/2 years.

[240znz]

Reading the old post it details that there should be a expansion tank behind the RHS rear side panel. I don't have one in my 71.

Did some 70/71 240's come without expansion tanks or maybe the PO removed it.

Help :mad:

[Bambikiller240]

The original thread is discussing USA market 240Z's. Doesn't apply to OZ/NZ market cars. Don't think you guys got it until the 260Z models.

Yes, a very few early 1970 USA market Z's arrived without the expansion tank.

Don't think you have anything to worry about.

[240znz]

Panic over then....... I have a transition car between the S1 and S2. It has some starnge things in it that I am finding that my Haynes manual doesn't cover.

There is certainly more to these cars than meets the eye.

Cheers:classic: :classic: :classic: