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Old 3 Weeks Ago   #1 (permalink)
Doc4421 is online now Rookie


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Omro   Wisconsin
Default 1968 Mustang Coupe: Carb line PLEASE TELL ME I"M NOT SCREWED!

For those of you who haven't been following my random attempt to clean and replace the valve covers on my Stang, I took the advice of the folks who told me it'd be "a snap" to remove them. It was until this thing snapped. This was hooked from the carb to the block and ran over the top of valve cover on the passenger side.

It's a line that has a flare nut and hooks into the carb. It's obviously rusted out at the bottom and it just disintigrated.

I have no idea what this is. Please tell me a) what it is and b) how screwed I am in trying to fix this.

Again, I really do appreciate the help.
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I'm restoring a barn car into a fun ride, so all the help I can get with thought is appreciated.
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Old 3 Weeks Ago   #2 (permalink)
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Williamston   South Carolina
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Kind of looks like a thermostatic choke line. You should be able to get a replacement for it. Check where it goes into the block. You may have to clean out debris for the new one to be installed.
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Old 3 Weeks Ago   #3 (permalink)
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I think sixtsixstang is right. I may not be broken, but just fell out. The choke tube runs from the exhaust manifold to the carb and the electric choke of newer carbs replaced this. They were designed to heat up and open up the choke when the engine is warm. If I remember correctly, it just slides into the hole in the top of the passenger side exhaust manifolds and then attach the fitting to the carburetor. Make sure there is no sh%t in the line and that the hole it slides into is clean

These tubes are available at the Mustang venders.
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1967 Mustang Convertible - 289-4V w/C4
1992 Bronco - 302 EFI Auto
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Old 3 Weeks Ago   #4 (permalink)
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hmm. I do not know what that is but you said one end goes to the carb an the other to ?!?!??? I cannot really tell what it looks like but is it a hose or are those electrical wires coming off the metal thingy at the top of your picture. can u find where the other end is? and where it connects?
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Old 3 Weeks Ago   #5 (permalink)
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The top is the part with the little flange nut. That part is fine. That part connects to the carb. The rest is wrapped in insulation and underneath the insulation is a metal line akin to a brake line. If it goes where I think it goes, it enters the engine right near where the exhaust pipe goes out of the engine.

This was a Cali car for a while, so smog is possible, but I'm not sure.

More help, please.
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I'm restoring a barn car into a fun ride, so all the help I can get with thought is appreciated.
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Old 3 Weeks Ago   #6 (permalink)
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It is a Choke line! It sends heat to the carb for the choke.
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Old 3 Weeks Ago   #7 (permalink)
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I corrected my post above and put in a photo.
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—Winston Churchill

1967 Mustang Convertible - 289-4V w/C4
1992 Bronco - 302 EFI Auto
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Old 3 Weeks Ago   #8 (permalink)
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Whatever you do, do not toss that asbestos sleeve on that carb choke heat tube. The replacements are probably just made out of fiberglass and will melt.
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Old 3 Weeks Ago   #9 (permalink)
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Thank you all. How hard is this thing to replace?
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1968 289 Coupe, 4.7L, 2BB, vinyl hardtop, gold metallic original.

I'm restoring a barn car into a fun ride, so all the help I can get with thought is appreciated.
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Old 3 Weeks Ago   #10 (permalink)
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Find the hole in the top of the exhaust manifold where the broken end of the old line was. Clean out the hole of the rusted broken pieces. Insert the end of the new line, and screw the other end to the carb. Finished.
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Old 3 Weeks Ago   #11 (permalink)
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The hole in the exhaust manifold may need a little cleaning out so the pipe will slip into it. I just swapped my valve covers today and I had to use a small wrench and a weight to sort of tap the pipe into the hole. There should also be another similar pipe without insulation that goes along with that one which plugs into the exhaust manifold a couple of inches away from that one. If you are missing either on they are sold as a set along with the little clip that holds them together. The bare pipe takes air from the air cleaner to the exhaust manifold and one with the asbestos on it carries warm air back to the choke coil on the carb.
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Old 3 Weeks Ago   #12 (permalink)
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Y'all rule. Thanks for all the help on this. I got a replacement part and I'm working it through the paces once the kid goes to bed. Once the car is back together, I'll post pictures.

Doc
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Doc's Pony:
1968 289 Coupe, 4.7L, 2BB, vinyl hardtop, gold metallic original.

I'm restoring a barn car into a fun ride, so all the help I can get with thought is appreciated.
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Old 3 Weeks Ago   #13 (permalink)
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I just cut mine off and crimped the end into the exhaust manifold when I got my Edelbrock carb. Couldn't really find a place for it, and I figured it was for emmissions, so I just said screw it. Of course, I now have an electric choke, so that doesn't really matter now.
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