Fuel Vapor line install ?
 

I'm going to install a fuel return line from the fuel filter back to the
tank. There was not an old line for me to follow. Should I run it close to
the supply? Also, when connecting it to the fuel filter should I run it
straight to the firewall or back around the front of the engine and run it
back down towrds the fuel pump. Any recommendations?
'75 CJ5 258 engine

Thanks
Paul

--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.

Re: Fuel Vapor line install ?
 

Paul Brogren did pass the time by typing:
> I'm going to install a fuel return line from the fuel filter back to the
> tank. There was not an old line for me to follow. Should I run it close to
> the supply?

Yep. Keep fuel with fuel.

> Also, when connecting it to the fuel filter should I run it
> straight to the firewall or back around the front of the engine and run it
> back down towrds the fuel pump. Any recommendations?
> '75 CJ5 258 engine

That I dunno. Just remember to leave slack for engine movement.

--
DougW

Re: Fuel Vapor line install ?
 

Paul Brogren did pass the time by typing:
> I'm going to install a fuel return line from the fuel filter back to the
> tank. There was not an old line for me to follow. Should I run it close to
> the supply?

Yep. Keep fuel with fuel.

> Also, when connecting it to the fuel filter should I run it
> straight to the firewall or back around the front of the engine and run it
> back down towrds the fuel pump. Any recommendations?
> '75 CJ5 258 engine

That I dunno. Just remember to leave slack for engine movement.

--
DougW

Re: Fuel Vapor line install ?
 

I'd run it down the firewall to the frame rail back to the tank. Best to try
and route it away from heat. The lien is gonna be filled with vapor and a
little gas so you don't want it pressurizing the line thus defeating it's
purpose.


Mr. Bill
at a 4 way stop.....the vehicle with the largest wheels has the right of way
My Jeep is not an SUV....your SUV is not a Jeep

Re: Fuel Vapor line install ?
 

I'd run it down the firewall to the frame rail back to the tank. Best to try
and route it away from heat. The lien is gonna be filled with vapor and a
little gas so you don't want it pressurizing the line thus defeating it's
purpose.


Mr. Bill
at a 4 way stop.....the vehicle with the largest wheels has the right of way
My Jeep is not an SUV....your SUV is not a Jeep

Re: Fuel Vapor line install ?
 

On or about Sat, 27 Sep 2003, Paul Brogren of pibrogren@msn.com wrote:

> I'm going to install a fuel return line from the fuel filter back to the
> tank. There was not an old line for me to follow. Should I run it close to
> the supply? Also, when connecting it to the fuel filter should I run it
> straight to the firewall or back around the front of the engine and run it
> back down towrds the fuel pump. Any recommendations?
> '75 CJ5 258 engine

I don't know how much AMC changed the vapor system plumbing between `76
and `79, but I know that there were some. On my `79 the return line from
the fuel filter runs as hose back along the top of the manifold to the
firewall, then down to the area of the clutch bellcrank, where it changes
to steel line. From there it parallels the canister lines along the
inside of the left-hand frame rail to the top of the curve over the rear
axle, where it dodges inboard, changes back to hose and returns to the
fuel sender. The `78 that I pulled apart a couple of years ago was pretty
much the same.

Since it is mostly vapor, a return line and enclosed, you really don't
care about the few inch distance to the exhaust system you have with this
path. Even if the heat generates a little extra vapor it will dump into
the tank where it will eventually vent to the canister and on to the
intake to be burned.

Re: Fuel Vapor line install ?
 

On or about Sat, 27 Sep 2003, Paul Brogren of pibrogren@msn.com wrote:

> I'm going to install a fuel return line from the fuel filter back to the
> tank. There was not an old line for me to follow. Should I run it close to
> the supply? Also, when connecting it to the fuel filter should I run it
> straight to the firewall or back around the front of the engine and run it
> back down towrds the fuel pump. Any recommendations?
> '75 CJ5 258 engine

I don't know how much AMC changed the vapor system plumbing between `76
and `79, but I know that there were some. On my `79 the return line from
the fuel filter runs as hose back along the top of the manifold to the
firewall, then down to the area of the clutch bellcrank, where it changes
to steel line. From there it parallels the canister lines along the
inside of the left-hand frame rail to the top of the curve over the rear
axle, where it dodges inboard, changes back to hose and returns to the
fuel sender. The `78 that I pulled apart a couple of years ago was pretty
much the same.

Since it is mostly vapor, a return line and enclosed, you really don't
care about the few inch distance to the exhaust system you have with this
path. Even if the heat generates a little extra vapor it will dump into
the tank where it will eventually vent to the canister and on to the
intake to be burned.

Re: Fuel Vapor line install ?
 

On my '76 CJ-7 (built in Sep '75), it exits the top tube of the filter
(not center, of course) as a hose over to the fender and down to the frame
(inside I think). At the frame, it's connected to a steel line that's held
in place by clamps with screws into the frame. The steel line is in
parallel with the tank vent from the canister somewhere at/under the
firewall.
I wouldn't worry too much about heat unless it's "askin' for problems"
close to a manifold or the exhaust pipe. Good luck to ya'.
o_o_o_o
Best Regards, /| ,[_____],
Jim, WP3JQ |¯¯¯L --O|||||||O-
()_)¯ ()_)¯¯¯¯¯)_)
EM60qk 30.447439N 086.628959W

Re: Fuel Vapor line install ?
 

On my '76 CJ-7 (built in Sep '75), it exits the top tube of the filter
(not center, of course) as a hose over to the fender and down to the frame
(inside I think). At the frame, it's connected to a steel line that's held
in place by clamps with screws into the frame. The steel line is in
parallel with the tank vent from the canister somewhere at/under the
firewall.
I wouldn't worry too much about heat unless it's "askin' for problems"
close to a manifold or the exhaust pipe. Good luck to ya'.
o_o_o_o
Best Regards, /| ,[_____],
Jim, WP3JQ |¯¯¯L --O|||||||O-
()_)¯ ()_)¯¯¯¯¯)_)
EM60qk 30.447439N 086.628959W