C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Dec 29, 2006 | 07:14 PM
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How the heck does the tach drive gear come out? The shop manual isnt exactly enlightening.
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Old Dec 29, 2006 | 07:31 PM
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Unscrew the large brass housing and the gear comes out, usually with it.
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Old Dec 29, 2006 | 07:35 PM
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Standard thread? Special tool?
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Old Dec 29, 2006 | 07:39 PM
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It has a slot, although not deep enough to do any good. Leave the tach. cable on and using Channel-lock type pliers, squeeze hard on the cable end and just unscrew counter-clockwise. They can get stuck hard...
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Old Dec 29, 2006 | 07:56 PM
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The gear on the main shaft won't allow it to come out. THere's a lip at the top of the housing. What am I doing wrong?
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Old Dec 29, 2006 | 07:58 PM
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Once you unscrew the brass bushing, the gear comes out with the bushing. There is nothing retaining it on the inside - there is no lip.
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Old Dec 29, 2006 | 08:02 PM
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I got the tach drive gear out. But the gear on the mainshaft wont allow the entire mainshaft to come out of the housing.
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Old Dec 29, 2006 | 08:30 PM
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Could it the area where the roll pin goes through the shaft has a burr and maybe dragging on the lower bushing? Just a guess.
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Old Dec 29, 2006 | 08:37 PM
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Ok, the main shaft gear....Yes, burrs on the shaft/gear will cause it to stick, as well as dried oil film. May need to soak it in P.B blaster or similar. Be careful with the bronze shaft bushings.
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Old Dec 29, 2006 | 08:38 PM
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Default Remove the gear

Originally Posted by Eddie 70
Could it the area where the roll pin goes through the shaft has a burr and maybe dragging on the lower bushing? Just a guess.
In order to remove the main shaft you have to remove the gear that drives off the cam shaft. So remove the roll pin and slide the gear off. The shaft now will slide out.

RonTech
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Old Dec 29, 2006 | 09:32 PM
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Well this is great. Now I have a busted distributer

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Old Dec 29, 2006 | 09:35 PM
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Luckily it appears that ecklers sells a new upper bushing. So now it appears that I need to figure out how to get the bushing out.
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Old Dec 29, 2006 | 09:48 PM
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I found a tool to install the bushing, but how to get it out?
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Old Dec 29, 2006 | 10:14 PM
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I use a long 1/4 inch hard steel rod. Catch the edge of the bushing and drive it out.
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Old Dec 30, 2006 | 07:56 AM
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roger dodger
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Old Dec 30, 2006 | 01:15 PM
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SUCCESS!!

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