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Old 05-06-2018, 06:10 PM
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chevy 409 Harmonic Balancer

hi guys hope someone can help I replaced the Harmonic Balancer be cause when you would try to time it the mark on the balancer would be aroud 3 inchs above the timimg cover marker so I put a new one on and it dose the same thing I also put a new distributor in to. the engine is not built up it is stock if it dose have aftermarket cam it is not all that maybe like an rv cam. the motor is in a 29 model a

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Old 05-06-2018, 09:30 PM
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Is this a brand new issue?have you verified tdc with a piston stop tool?
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Old 05-06-2018, 09:35 PM
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Just to ne clear, you are talking about an old 409" W-head Big Block, and not a 400 small block that has been overbored .040"??

Or at you dealing with a small block Chevy??
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Old 05-07-2018, 12:11 PM
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Quote:
Originally Posted by ericnova72 View Post
Just to ne clear, you are talking about an old 409" W-head Big Block, and not a 400 small block that has been overbored .040"??

Or at you dealing with a small block Chevy??
X2, curious minds are awaiting this answer.

Bogie
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Old 05-07-2018, 06:50 PM
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no I have not use the tdc tool yet, I have to find where to get one, and it is an original 1963 409 motor
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Old 05-07-2018, 09:40 PM
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Quote:
Originally Posted by ron29 View Post
no I have not use the tdc tool yet, I have to find where to get one, and it is an original 1963 409 motor
Beautiful engine, like Harley Davidsons, I always thought the W motor from Chevy was work of industrial art.

Is the timing original or at least aged? Your symptoms description would have me looking at wear and stretch. Also, on the upfront list of things would be slippage of the bonded outer ring of the damper. Another high on my list would be wear or failure of the key or crank keyway.

Bogie
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Old 05-08-2018, 07:21 AM
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Quote:
Originally Posted by ron29 View Post
no I have not use the tdc tool yet, I have to find where to get one, and it is an original 1963 409 motor
Summit has them.


https://www.summitracing.com/int/sea...0Center%20tool

And balancer.

https://www.summitracing.com/int/sea...-size/6-7l-409
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Old 05-08-2018, 07:09 PM
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Thanks guys for the information on that I have order a piston stop so I will chek it out this weekend to see if that will fix it I will let you know.
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Old 05-13-2018, 10:34 AM
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Hi guys will I got a piston stop tool and now I got the timing good car is running better I have not time it at around 3000 rpms with degree tape. but it is running good. I have never use the degree tape dose make it any better when you time it at the high rpms, I am not drag race it. just want to say thanks
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Old 05-13-2018, 11:44 AM
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Here is a good article for those of you who may have timing problems.....
http://www.crankshaftcoalition.com/w...op_dead_center
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Old 05-13-2018, 12:25 PM
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Very easy to make your own piston stop from an old spark plug and piece of round stock, just ensure the stop is securely epoxied or spot welded to the plug.
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