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NCC Forum Home Page -> NCC - General Discussion -> How do you remove a broken throttle plate blade screw from the throttle shaft?
Post Info TOPIC: How do you remove a broken throttle plate blade screw from the throttle shaft?
jim larson


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How do you remove a broken throttle plate blade screw from the throttle shaft?
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Well, I tried to remove the screws that someone else installed.cuckoo  I wanted to put in the original type screws with the slotted head and the H back in.  It looks like the guy used Red Locktight instead of blue or staking the screws.  1st one was OK.  2nd one broke. 3rd one OK, 4th one broke.  I guess I should have done something to loosed the lock tight.  But what?

So, how to I get whats left of the screw out?confused  Thanks in advancephoto.JPG



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Jim L

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Scott Parkhurst


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It seems drilling it out is the only solution. Hardly seems worth the effort to do it right- you'll probably end up needing new throttle shafts once you drill the threads out.

So- be super careful. Or find another base, or a whole different carb that needs rebuilding. You probably want to preserve this one for the numbers on it, right?

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Scott Parkhurst

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jim larson


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Yes I want to preserve it.  Throttle shafts are available.



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Jim L

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Get a Dremel and grind the screw down flush with the shaft so you can remove it from the base and replace the shaft.

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Mitch D.   River Falls, WI

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Chris S


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Are there any threads sticking out the back side that you can get a hold of?  If so apply some heat to melt the lock tight and spin it out the back. 

If there are no threads out the back I would still heat it up and use a small drill bit, may be it would catch and spin out.  Sounds like a long shot but has worked many times for me on various projects.  Just have to make sure and support the throttle shaft so as not to bend it.



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Chris S.

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Another way if there is some threads sticking out the back is use a dremel tool and cut a slot in it. Then heat and use a standard screwdriver to turn it out.

I'm kinda thinking like Mitch said. Grind it down flush just to slide the shaft out and replace the shaft.



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Lost in the 60s


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The reason I didn't suggest heat is because it is a very confined area and it will take a good amount of heat to soften the Red loc-tite. That heat can spread quickly thru brass to the aluminum base. I would avoid that. You're most likely going to need to replace the shaft anyway. That's why I suggested just getting it out safely and get it over with...thumbsup



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Mitch D.   River Falls, WI

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1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
jim larson


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Thanks everyone.  The throttle shaft was off the carb, I first tried a sobering iron; but that didn't seem to do much.  The I took a fine tipped torch.  Heated it for 15 second, grabbed on the back side with a needle nosed vice grips.  They came right out.cenuniv

 

The throttle shaft was new, so I wanted to re-use it.photo.jpg



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Jim L

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The fine tip torch was exactly what I would've used too. Intense heat in a small tip. I just didn't know if it would spread to the base and do harm. Good job...tiphat



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Mitch D.   River Falls, WI

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1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
John D


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Machinist gods were smiling on you...

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John D. - St. Louis Park, MN.

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Jim
FYI That is an OEM Carb. That throttle shaft is about 1/2" longer than the aftermarket carbs and harder to find.

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Bob W.

Lino Lakes
jim larson


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I actually have four 66 carbs, and a couple of extra bodies and parts. I will have to sell some of them.  Planing to keep one list 3139 and one 3419.



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Jim L

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Scott Parkhurst


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Congrats! Nice work to avoid the snowballing headache that could have been.


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Scott Parkhurst

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