1967 Holley 3810 help needed

[Donald O.]

I'm having a problem with a choke operation rod. See attached pix number 1.
I can re-attach it but after a couple of starts it comes out of its need attaching point and gives an idle speed of 1500 or so. See the circled area with the small red "X"s. I then have to go under the hood again and make sure its free for an idle of 800.

I have a small "E" clip I may use (AA battery for scale), see pix number 2.....if all else fails.

Thanks,
Don

Pix no. 1


Pix no. 2

[Bill C.]

Re: 1967 Holley 3810 help needed

don -

i think there should be a nylon type bushing that the rod goes down through (up top by the air horn)
if thats missing or worn out, it will let the rod swing back and come out of the hole.

but not an expert.....

[Ralph E.]

Re: 1967 Holley 3810 help needed

Don, I have the same carb and set up. I just went out to the garage and checked. It appears the end at the "X" is larger than the hole and the rod will not pass thru like yours does.
Think the easiest fix for you is the "E" pin or a clamp similar retainer which hold the choke rod.

[Donald O.]

Re: 1967 Holley 3810 help needed

don -

i think there should be a nylon type bushing that the rod goes down through (up top by the air horn)
if thats missing or worn out, it will let the rod swing back and come out of the hole.

but not an expert.....

Bill,
that bushing is there.
Don

[Donald O.]

Re: 1967 Holley 3810 help needed

don -

i think there should be a nylon type bushing that the rod goes down through (up top by the air horn)
if thats missing or worn out, it will let the rod swing back and come out of the hole.

but not an expert.....

Bill,
that bushing is there.
Don

Should that bushing "float" or should it be set into a single position?
Don

[Leif A.]

Re: 1967 Holley 3810 help needed

Don,
I think it is a "bend" fix. I looked at my 3810 and that lower pin does float in and almost out of the lower hole. Also, looked at a 3810 service replacement and it is the same. Is it possible to gently bend the lower half of the rod more towards the hole so that the rod can't float backwards and fall out? Possibly attempting to bend out (towards the passenger fender) from the 15 degree bend halfway down the shaft. Hopefully, one of the carb guys who rebuilds these Holleys will chime in.

[Ralph E.]

Re: 1967 Holley 3810 help needed

Looking at the rod again, I think Leif has the right idea. Can you bend the rod slightly as Leif explained?
Again, it looks like my set up as well. Maybe somehow you changed the geometry?

[Bill C.]

Re: 1967 Holley 3810 help needed

Don
The bushing in my carb is fixed and does not float around

Bill

[Donald O.]

Re: 1967 Holley 3810 help needed

I guess I'll take it off and work on it on a bench instead of leaning over the fender and get a sore back.
Good thing I have a NOS mounting gasket to use.

What it the mounting torque for the 4 attaching nuts that secure the carb to the int mfld?

[Bill C.]

Re: 1967 Holley 3810 help needed

don,

not 100% sure, but I have always done 20# on all four and its has worked fine.
you need just enough to compress the gasket and get the base plate even.
you for sure don't want to over tighten, you could warp or crack an ear.

bill

[Timothy B.]

Re: 1967 Holley 3810 help needed

Is it possible that rod is upside down?

[Leif A.]

Re: 1967 Holley 3810 help needed

Is it possible that rod is upside down?

Tim,
Though the OP photo does not show the top of the rod in its' entirety, it has a completely different bend on the top...so, it's installed correctly.

[Leif A.]

Re: 1967 Holley 3810 help needed

I guess I'll take it off and work on it on a bench instead of leaning over the fender and get a sore back.
Good thing I have a NOS mounting gasket to use.

What it the mounting torque for the 4 attaching nuts that secure the carb to the int mfld?

Don,

I typically tighten the four nuts down finger tight and then just a quarter turn more with a wrench/socket. As Bill mentioned, you certainly don't want to warp the base or crack a flange.

[Bill C.]

Re: 1967 Holley 3810 help needed

[Donald O.]

Re: 1967 Holley 3810 help needed

Fixed.
Took the carb off and tweak bent the rod, as described in the service manuals (both GM and Holley).
I remember tweak bending the rod after I got this carb as the choke rod was binding against the main body. I guess I had over tweaked it.

Don