Vacuum lines

[Williamdllr]

Alright so I got a new job so I have extra cash laying around now. I want to replace all my vacuum lines under the hood and was wondering what sizes of lines do I need? And the lengths of each line? I have a 1985 nissan 720 with the 2.4

[Justin Berni]

I don't know what size, but you could always just pull one hose off and take it to the auto store and ask for a bunch of that size

[720inOlyWa]

That’s what I did.

[Charlie69]

I do not remember the sizes but I bought 10 feet of one size and ran short.  My truck has California emissions.  Has more vacuum line than the Federal trucks.

[datzenmike]

If your original lines have small color paint marks on them then they have small metered restrictions inside.

 

 

I would only replace missing or obviously damaged or cracked lines.

[trjerm]

Do you know which lines had restrictions in them? Mine have All been changed out and there aren't any with " small color paint marks " on them. Seems to run fine, but it'd be nice to see if it runs even better w/ the metered restrictions in place

[datzenmike]

..... no.

[xsdg]

If you don't have them, you're probably not going to find replacements, except out of a junkyard.  But I have them one both of the carb base lines (for the EGR and vacuum advance), plus one one of the lines coming out of the TVV or the vacuum switch.

 

I don't remember offhand, but the FSM has 'em.  There's a single page that shows the EGR and advance vacuum routing, and that page shows the three logical (not physical) locations where they belong.  There's a lot of branching under the actual hood that's not documented in the FSM, so YMMV :o)