Page 1 of 1

Vacuum Hose routing diagram 1971

Posted: Sun Jul 02, 2017 8:05 am
by crashresq21
Morning guys,

Does anyone have a vacuum hose diagram for a 2bbl 318 from 1971? When I bought it everything was EVERYWHERE in the case of the hoses. Just rebuilt my carb and would like to atleast get the important ones routed correctly. Some items are missing but something is better than nothing. Thanks in advance.

Re: Vacuum Hose routing diagram 1971

Posted: Sun Jul 02, 2017 7:54 pm
by MadMC63
If it's a Carter not in California... The distributor vacuum goes from the distributor to the right side. Should be sticking straight out of the side out the carb. PVC is center rear of base plate. Choke vacuum is to the right of the PVC. Bowl vent is front top of carb and goes to the breather on the right valve cover.

Re: Vacuum Hose routing diagram 1971

Posted: Mon Jul 03, 2017 8:30 am
by crashresq21
Awesome, thanks for the intel but I'm more of a visual guy sorry. Heres the carb in question. I'm guessing the big rear outlet goes to the PCV valve on the valve cover. Most of the "emissions" stuff is gone so I"m working with what I see.

Theres dual tips on the air box and one that goes on the air-box horn for reference.

Re: Vacuum Hose routing diagram 1971

Posted: Mon Jul 03, 2017 8:18 pm
by MadMC63
Yep it's a Carter. The vacuum connection to the left of the PVC is for the air temp sensor. The air temp sensor is in the air filter housing. All locations are from the drivers seat looking toward the front of the vehicle.

Re: Vacuum Hose routing diagram 1971

Posted: Tue Jul 04, 2017 5:37 pm
by crashresq21
Ok so everything is pretty figured out BUT I ran into this glitch. the port for the line from the distributor....well......exists but doesnt have a port to attach the line. How can I put one in OR can I just run that tube disconnected and cap it?

Sorry about the million questions, I'm a body work/shadetree guy, not a tuner LOL

Re: Vacuum Hose routing diagram 1971

Posted: Tue Jul 04, 2017 8:44 pm
by MadMC63
Typically there's a tube pressed in that location. All you need to do is install a small tube to attach the vacuum line to. Just find one the right diameter and tap it into place. The original can be removed with a pair of pliers fairly easily so it's not a surprise to have one come out while pulling the vacuum line loose.