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Topic: is consumed distributor gear

in Forum: C4 Engines


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is consumed distributor gear (1/8)
 7/2/14 10:24am
fabio075
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Joined: 1/23/2012
Posts: 30

hi I have a problem with the gear changed the distributor and after about 600 miles and already half eaten what can it be?

 thank you

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Re: is consumed distributor gear (2/8)
 7/2/14 1:50pm
Fred in Alabama
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Montgomery, AL - USA

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1986 Gray/Blue Z-51 Coupe & 1998 Pewter Coupe


Joined: 4/19/2012
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Check alignment and verify that both gears are cut at the same angle (number of teeth may be correct but if at the wrong angle they may engage, but self destruct).  Good Luck   Fred  
Re: is consumed distributor gear (3/8)
 7/2/14 3:04pm
fabio075
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thanks Fred could be the game of the shaft of the distributor now I put a 0.008 inch
Re: is consumed distributor gear (4/8)
 7/3/14 7:10pm
davep85c4
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Posts: 254

fabio075 said:

hi I have a problem with the gear changed the distributor and after about 600 miles and already half eaten what can it be?

 thank you



The new gear is not mellonized. It is incompatible with the camshaft material. Distributor gear wear is very common when guys start swapping parts around without knowing about the material requirements. Roller-lifter cams require a melonized gear. Or the distributor gear gets eaten very quickly.
Re: is consumed distributor gear (5/8)
 7/4/14 8:15am
fabio075
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Posts: 30

understood

 you tell me the cams and gears  differences?






|UPDATED|7/4/2014 5:15:10 AM (AZT)|/UPDATED|
Re: is consumed distributor gear (6/8)
 7/4/14 11:21am
davep85c4
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Posts: 254

Google "melonized distributor gear". You ought to end up really confused.

One of the things I've learned about this subject is that the bronze distributor gears many people suggest are NOT a solution for street engines. They don't last more than 1,000 miles. Race-car only stuff.  If you start purchasing gears, pay attention to distributor shaft diameter. There are 3 different diameters.

I've never had trouble by sticking with the stock gear on the stock cam. The problems seem to arise when people swap an aftermarket distributor onto a stock factory roller-lifter camshaft. The roller-cams are a hardened steel material that eats up a gear intended for a 'softer' iron-material non-roller cam.
Re: is consumed distributor gear (7/8)
 7/7/14 8:40am
fabio075
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Posts: 30

ok then you say that if I mount an original should not have problems
Re: is consumed distributor gear (8/8)
 1/22/15 8:03am
REDVETTE85
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NORTON, OH - USA

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I know this is an old post   & i don't know if that engine has or dose not have a roller cam I have a roller cam in my ZZ4 block with a Bronze distributor gear (aftermarket distributor) and I have well over 20,000 miles on it Comp.cams has a composite gear that Racers are now using 
  My first question is  has it been backfiring ?    
 I haven't been on the computer due to my work schedule now in January not many air conditioners need repaired in    
O H I O so I'm catching up
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