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CamoKing

Carburetor rebuild goes obsessive?

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Back again with another request for advice.  Thanks for all the help you've been lending from this great Ratsun.net.

 

I couldn't just stop at cleaning, new gaskets, and a few other replacement parts from a kit.  I had to tear the whole Hitachi DCR342 down to be thorough...including removal of the choke and lower butterfly plates.  This was a learning experience.  Wonderful!  I've learned the term: STAKING

 

After discovering that the screws were staked, I used a dremel to grind the ends and free them.  (And, render them useless)  Of course, that led me on a hunt for new screws which I found at Ace Hardware luckily.  Each plate had a pair of different length screws leading me to an arduous mini milling task that, after several frustrating hours, and several rejects, yielded 3 pairs of new screws.  I've reassembled these parts using some Permatex Red thread locker hoping that will suffice.

 

The question arises then as to whether or not I need to 'stake' these little suckers and, if so, how does a 'back yard' novice mechanic with limited tools accomplish such a thing ?

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Skip it.  When the carb has issues again, address it.  Lock tite should be fine

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Staking would typically be done with a 'center punch,' I'm not speaking from direct experience.  I don't know if it will fit in the throttle bores at the proper angle?

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Permanent locktite. The screws would have to be soft brass to stake them easily and the throttle shaft will bend if not supported properly.

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Being a redneck I would do a redneck fix and booger up a few threads sticking out the back. You are only trying to avoid back out from vibration.

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4 hours ago, Stoffregen Motorsports said:

No loctite is permanent. Not even on tiny brass screws.

 

Agreed, but for all intents and purposes permanent enough to trust in a carburetor throat.

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Right.

 

The only time red loctite posed a real problem was on a set screw inside of a Borgeson steering joint. I had to heat the metal around the threads so much that it almost destroyed the seals around the u-joint. I did manage to get the set screw out without damaging the joint, but it was a close call.

 

Throttle shaft screws that have loctite on them can be removed, but you will need a quality screwdriver (Snap-On) and you will need to rock them back and forth to work the screw out. Trying to get it on the first shot almost always leaves the head of the screw rounded out.

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