LUVTruck.com

phpBBV3 Message Board
It is currently Wed Dec 13, 2017 2:35 pm

All times are UTC - 6 hours




Post new topic Reply to topic  [ 5 posts ] 
Author Message
PostPosted: Mon Jul 24, 2017 10:35 pm 
Offline
Junior Member

Joined: Fri Jun 09, 2017 9:58 pm
Posts: 9
I got a 1972 a little over a month ago and this is my first car project. I knew very little going in so I just assumed everything was stock, but poking around this site and manuals the engine was swapped to a g180z and I have a mixture of parts not for my truck or missing:

Attachment:
enine.jpg
enine.jpg [ 820.28 KiB | Viewed 334 times ]


I just put a Weber on and found all the emissions stuff was pretty much gone/disconnected. My concern here is what to do with what I thought was the return line on the old hitachi carb and the fact my fuel ventilator system is disconnected.

I've been reading a lot of posts on the forum about people in this situation that cap the return line or have problems when the tank isn't vented. I don't have a check and relief valve. The oil pan hose just vents to the open air.

My question is does the 1972 have a return line? The hose that was used for a return line on my truck looks like is was for the fuel ventilation system and went to a check relief valve if I'm looking at the attached graphic correct:

Attachment:
series1-fuel-system.jpg
series1-fuel-system.jpg [ 185.46 KiB | Viewed 334 times ]


Since I don't have the check valve can I just put a filter on the fuel vent line and oil pan line and just let them vent to open air?

I also have an electric low pressure high output marine fuel Pump by Carter that came with the truck. This model is slighty higher PSI then required so I got a carter p4070 coming.

This is how I found my fuel tank connected. The read lines are how the hoses are attached to bypass the ventilation system. The two hoses running to the front of the truck are still intact but an electric fuel pump mount was welded near the tank for pump and the hose on the filler is just disconnected and hanging open to free air:
Attachment:
luv tank.jpg
luv tank.jpg [ 116.84 KiB | Viewed 334 times ]


Top
 Profile  
Reply with quote  
PostPosted: Mon Jul 24, 2017 10:45 pm 
Offline
Junior Member

Joined: Fri Jun 09, 2017 9:58 pm
Posts: 9
Here is a diagram of the air cleaner system for the 1972. In the "view B" detail I'm thinking thats the check/relief valve taking the oil pan and fuel vent hoses in.
Got these images from the Master Parts Manual on this site, great resource. The next page does give a name and part number for the numbers but is vague calling the check/relief valve just a "valve"


Attachments:
series 1 air cleaner.jpg
series 1 air cleaner.jpg [ 140.55 KiB | Viewed 332 times ]
Top
 Profile  
Reply with quote  
PostPosted: Tue Jul 25, 2017 12:15 am 
Offline
Junior Member

Joined: Fri Jun 09, 2017 9:58 pm
Posts: 9
Ok I only see one fuel nipple on the 1972 carb. So does it make sense to put a filter on the fuel vent and oil pan hoses? (don't have the check/relief stuff


Attachments:
series 1 carb.jpg
series 1 carb.jpg [ 225.58 KiB | Viewed 327 times ]
1972 carb.jpg
1972 carb.jpg [ 206.2 KiB | Viewed 327 times ]
Top
 Profile  
Reply with quote  
PostPosted: Tue Jul 25, 2017 7:49 pm 
Offline
Addicted to LUV
User avatar

Joined: Fri Jul 01, 2005 9:41 pm
Posts: 6129
Location: Camarillo, CA
Nice work on the research. First I will start with the fuel filler. The small hose is needed to displace the air while filling up. I bet it's slow to fuel now.

The hoses on top going to the plastic bottle are part of the expansion system. Without a vented gas cap you need someplace for the tank to vent while the fuel heats up and expands.

As far as the valve for the oil pan/fuel tank that is where the pressure is released with a non vented cap, with that working you won't smell fuel as it expands.

Since parts are missing I would just put a filter on the oil pan vent and place it up high. If you can find a vented cap then you could plug all of the other lines but you may smell fuel vapors in the area of the vented filler cap.

_________________
Certified pilots, looking down on people since 1903.


Top
 Profile  
Reply with quote  
PostPosted: Tue Jul 25, 2017 10:53 pm 
Offline
Junior Member

Joined: Fri Jun 09, 2017 9:58 pm
Posts: 9
Thanks for the reply Luvrv8, I'm gonna take your advice and run a line up the side the of engine compartment with a filter for the oil. The filler line is disconnected from the main tank but still connected to the filler neck. So really it's vented at that line just hanging down to open air. I haven't ran the truck long enough to notice any fumes since I garaged it shortly after I got it to fix some brake issues. I'm gonna cap the original vapor line and run with the open filler neck line and see how it goes. I did just come across a post on a forum for a wolverine atv that has an open vent line people complained about fumes, a solution was offered to put a regular fuel filter on the one end of the hose with the other end open. I may try that:

http://www.wolverineforums.com/forum/9- ... pdate.html

Still haven't tried to start since installing my weber I'm waiting on a new fuel pump coming in the mail. I'll post an update when I get it running.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 7 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group