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Crank sprocket sticks out farther than cam sp.

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Old Jun 20, 2006 | 06:08 PM
  #1  
hoogabooga's Avatar
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From: mocksville nc
Car: '68 corvette '73 Corvette
Engine: 427 454
Transmission: TH400
Crank sprocket sticks out farther than cam sp.

I just installed my cloyes true dbl. roller chain. I heated the crank sprocket then drove it onto the crank until it felt solid. I am sure it is on as far as it will go. When i put the cam sprocket on i noticed that the crank sp. sticks out about 1-2 mm farther than the cam sprocket. Is that normal?

thanks
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Old Jun 20, 2006 | 06:15 PM
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12SecondTA's Avatar
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Car: 85' TA
Engine: 355 Carbed
Transmission: Built 700r4
put down the shrooms!!!!

dont eyeball it, i doubt its much even possible todo that...
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Old Jun 20, 2006 | 08:20 PM
  #3  
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From: Philly, PA
It's not right but I wouldn't say it's not "typical" on some engines, production tolerances being what they are.

1. make sure the crank sprocket is driven on until the back of it is in contact with the "shoulder" on the front of the crank. Until it's driven up hard against this shoulder it's not home.

2. You did put the crank pulley on the right way, right? Back side of a 2-chain set will usually have a little "recess" on the back of the crank sprocket that actually contacts the shoulder on the front of ther crank snout. Front side will have the timing marks and no recess.

3. Make sure you push the top timing chain gear all the way against the block with the cam bolts tightened. That's where it will be in a running engine- not pulled out away from the front of the block, not even a little bit.

4. You are using the right timing chain set, right? Not a top gear from one set, a bottom gear from another. They're a matched set. No mixie-matchie.
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Old Jun 20, 2006 | 08:29 PM
  #4  
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From: mocksville nc
Car: '68 corvette '73 Corvette
Engine: 427 454
Transmission: TH400
1) i beat it until i felt Solid hits.

2)yes, timing mark is out.

3)tightened the cam bolts when i checked it.

4)brand new cloyes set.

i put a new link style chain on and it lines up perfect. i am about to the point of trashing the cloyes.
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Old Jun 21, 2006 | 08:01 PM
  #5  
hoogabooga's Avatar
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From: mocksville nc
Car: '68 corvette '73 Corvette
Engine: 427 454
Transmission: TH400
After talking to cloyes and summit they tell me that the block will have to be machined to use this chain.
http://store.summitracing.com/partdetail.asp?part=CLO%2D9%2D3100&N=0&autoview=sku


Is it just me or shouldn't it say that somewhere???

I read other posts on here where that chain was used with no problems.
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Old Jun 21, 2006 | 08:06 PM
  #6  
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Car: 85' TA
Engine: 355 Carbed
Transmission: Built 700r4
i'll sell ya a gear drive for $20 plus shipping, never used, installed but decided against the noisy gear drive...
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