whatsit....with pic

All,

I am digging through a box of old tools I have gained via garage sales, gifts, etc.

Attached should be a picture. The yellow handled tool has a small hex on the end with a chevy emblem in the yellow.

The black handled tool has "industrial retaining ring co t-x3_". I can't read the last digit/letter.

Please take a stab at their intended use.

D.
a235739.jpg
 
By small hex, do you mean an Allen wrench? Is that a spring between the handle and the bit? Looks like a flexible driver to me. I have one in 1/4" drive.

The other tool looks like it was intended to install and/or remove some kind of retaining/snap ring.
 
I believe the yellow handle was used for distributor work on older cars. the black handle was for removing and installing c clips on valve spings.
 
i think the yellow handled on is used to adjust the dwell angle on pre electronic ignition distributors on gm products. the other one maybe for taking out the retaining clip on window cranks on gm pickups and trucks been a long time since i've used them
 
(quoted from post at 18:21:31 08/27/16) i think the yellow handled on is used to adjust the dwell angle on pre electronic ignition distributors on gm products. the other one maybe for taking out the retaining clip on window cranks on gm pickups and trucks been a long time since i've used them

I think we have a winner!

There was a metal door you slid up on the distributor cap, you varied the point gap by twirling the tool, which changed the dwell, which is the number of degrees the points cam rotates while the points are closed.

My dad made the black tool out of aluminum sheet to get the window crank and door handle off.
 
Yellow, likely to set points gap/dwell on ~60's GM distributors with window in side of cap.
 
Yep! Those points normally came with a small allen wrench to adjust them with. This tool worked a whole lot better.
I believe GM referred to those points as "uni-set" or something like that. Didn't need a feeler gauge. Just bolt them in, start the engine and adjust.
 
You used a dwell meter and adjusted the point gap according to dwell with the engine running.

Been years since I did that, I think I still have a dwell meter around somewhere.
 
You could even adjust them by ear if you didn't have a meter. I used to do that. I think the instructions told you how. I don't remember for sure, but I think you turned the screw till the engine started to miss, then backed it off till it smoothed out again. Don't remember all the details. It's been many years ago, but I know I used to put them in my own vehicles and I never had a meter.
 
been 50 years since last Pontiac but remember something about in till it misses then 1/2 round back I may be wrong but sounds right to me now also thinking 30 degrees on 8 cyl 45 degrees on 6 cyl and 60 degrees on 4 cyl for dwell readings also if your tach only had settings for 6 and 8 cyl you used 1/2 reading for 4 cyl in 8 cyl position
 
Top one adjusts GM V/8 point dwell, bottom one is a flat thin type of snap ring installer I think (cir.clip) maybe.
a235750.jpg
 
The bottom one is an "E Ring" install and remove tool. They come in different sizes.It's one of those things that makes the job a little easier but not really necessary. I got by without em for about 30 years. lol
 
(quoted from post at 19:00:30 08/27/16) Yep! Those points normally came with a small allen wrench to adjust them with. This tool worked a whole lot better.
I believe GM referred to those points as "uni-set" or something like that. Didn't need a feeler gauge. Just bolt them in, start the engine and adjust.
The uni-sets incorporated the points and the condenser into one package. Once installed, they were usually close enough to start the engine, but you would still need to set the gap with a dwell meter. (As an aside, they were light-duty and not near adequate for speeds over about 4500 rpm.
 
(quoted from post at 12:00:22 08/27/16) All,

I am digging through a box of old tools I have gained via garage sales, gifts, etc.

Attached should be a picture. The yellow handled tool has a small hex on the end with a chevy emblem in the yellow.

The black handled tool has "industrial retaining ring co t-x3_". I can't read the last digit/letter.

Please take a stab at their intended use.

D.
a235739.jpg

The top one I think is to write with :D
 
(quoted from post at 21:32:09 08/27/16) Top one adjusts GM V/8 point dwell, bottom one is a flat thin type of snap ring installer I think (cir.clip) maybe.
a235750.jpg

If you're referring to your photo with the MAC dwell tach, the long chrome thing is a 1/4" drive carb mixture adjusting tool. Spin the knob on the right side of the photo. Lot of the carbs had a fuel bowl hiding the screws from the top and a distributor or other junk hiding them from the front.

You can snake that in and use a special screwdriver bit that had a metal ring around the straight part of the bit. Then you could get the bit on the screw and spin the knob while pushing on the screw. When the bit dropped into the slot, the ring of metal would keep everything lined up. My set up also had the 1/8" hex for the distributor, for the ones you could barely see the distributor....anything with a 1/4" drive would fit....
 

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