TB removal and then some!!!

[Roadster]

Out at the 74 today, took the TB out with me to see if we could get the cover off. We ended up drilling two holes and used a slide hammer...came right out...
Cleaned up the TB somemore, now to get ready to go over everything, apply new dag, put on new idle set screw, paint the housing and add my new cover plate from Carter. And then hope it all works....lol...lol[emoji1]
Still have more to do before the plenum goes back on...
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[Jagdpanzer]

Next time try loosening to screws halfway then us a rubber tipped air gun to blow shop air into one of the coolant bore holes while holding a finger over the other. Works for me every time.

[Roadster]

I will remember that, hopefully there isn't a next time....

[Roadster]

Did some work on the TB today. I am really trying to learn and attempt this myself redoing the TB. If it all fails, will deal with that when it happens....
I changed the idle set screw with the hex head bolt. And as you will see in the pics, there is daylight in the primary blade. I know I have to adjust it properly on the engine, but have some questions....
1-is the primary throttle shaft supposed to have side-to-side movement?
2-if it does, would that indicate that the shaft is worn?

I noticed that if I operate the TB by hand and open the primary blade, I can move the blade itself side-to-side by grabbing the end of the shaft, and moving it in and out. Again, would like to know if this is part of normal operation or not. Any info is appreciated.

I know I am going against the grain, but I am going to remove all traces of the existing "dag", (most of it has been done already) and any remaining buildup in the bores. I am then going to reapply the "dag" to the secondary throttle plates per the instructions for curing that came with the substance. Also from previous pics in this thread, it appears at one time or another there was a sufficient amount of something (maybe "dag") that was applied to the primary blade. Depending on the out come, I may apply the "dag" to the primary blade too.

My throttle blades appear to operate normally, in that there is no binding that I can detect when opening and closing the blades. Spring tension feels very strong, and the secondary throttle shaft has no side-to-side movement at all. It's just that the primary blade when it comes of its "retainer" (for lack of the correct word) is the movement that I am concerned about.

Again, thanks for any comments or suggestions...

my unscientific way to make sure the bottom of the bolts are flush, after filing...
the allen head...(which I didn't use)...

the hex head...(which I did use)...

the true test of straightness....lol

the original idle set screw w/nut...

[Roadster]

you can use either an 8mm or 5/16" combo wrench for the install on both the nut and the bolt...I used a fine tip marker to mark where the primary blade was closed with the original idle set screw...

new idle set screw being installed...

daylight in the primary blade...

more daylight when adjusting the screw...

less daylight when adjusting the blade in a more closed position...

[XfireZ51]

"My throttle blades appear to operate normally, in that there is no binding that I can detect when opening and closing the blades."

This may be true when everything is cold, but heat has a way of changing tolerances.

[Roadster]

Originally Posted by XfireZ51

"My throttle blades appear to operate normally, in that there is no binding that I can detect when opening and closing the blades."

This may be true when everything is cold, but heat has a way of changing tolerances.

I understand what you are saying.....but do you have any thoughts on the side-to-side shaft movement as described above???

[Jagdpanzer]

There should be little if any side to side play with the primary fully closed.

[Roadster]

Originally Posted by Jagdpanzer

There should be little if any side to side play with the primary fully closed.

Yes with the primary fully closed there is not any movement at all of the primary blade in the bore. Although the primary shaft can be moved just a touch in that position, which I now am assuming is normal from what you said.
My main concern as mentioned was with the movement with the primary partially opened, which I also received info, that it is not abnormal for it to be that way.

Just doing a CMA before I proceed.....thx....

[Roadster]

Did more with the TB today. I am now ready to apply the " dag" tomorrow. Instead of baking in the oven to cure, you could also let it sit for about 3 days to also cure.
Cleaned the entire TB with Brakleen numerous times. Used paper towels to remove everything, and then a good compressed air dry.
Removed all traces of any "dag" from before. Interesting though that in the primary blade bore the substance was extremely difficult to remove. As mentioned previously, I am under the impression that somewhere along the line, " dag" or something similar was applied there.
It is now cleaned and ready to go to the next phase.
Some pics of earlier today progress....

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