Quote:
Originally Posted by Jay S
Every 9-way timing set from comp I have ever seen is designed so each key affects the cam timing by 2*.
-8*, -6*, -4*, -2*, 0*, 2*, 4*, 6*, 8*
I hope the cam was degreed in after the cam timing was changed. The 9-way timing sets are designed to change the cam timing in 2* increments, regardless of the crank turning twice as fast as the cam.
Sometimes harmonic balancers fail because something on the inside of the engine creates an unusual stress on it. It could be having one piston in backwards contributed to the cracked hub.
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The Gears were set to "no" advance to start, yes.
It sounds like you don't think that the Trans. accident that I had destroyed my TH 400. Due to running over a root, under a driveway, that caused an upward push under the Trans Oil Pan while the Engine was running caused a forward Thrusting movement to all the internal shafts in the Trans., carrying through to the Engines Crank shaft, then the Hub? Several people said that the Crank Harmonic Balancer Hub breaks at the key way often enough for other reasons. Since I don't know, I reasoned that this is how, in this case, the Hub became unusable.
Your theory is as good as mine. Being that I found the broken Hub after the Trans. rebuild and that it was after the accident in the garage running the vehicle is when I experienced the Ghost noise first and then again when I first began to test and tune the rebuilt Trans, I stick with moving on with fixing the locations that I have been convinced will do the best, in this case. For the last ten years I have been jumping over Hurdles trying to move past one problem or another, since they happen at different times I address them as so, one at a time. This fix is $600 having the Heads remanufactured, $210 in gaskets, some miss. items and next will be the new Hub or combination of a Hub and Harmonic Balancer, I found a respectable Billet unit for $210-$230.
$ 1000 is the limit for cash, at this time, I will take my chances and keep my fingers crossed. However, rite you are, in stating that I should rebuild the bottom end now, due keep in mind that the car has been off the road now for two years due to the Trans. rebuild. Time to save some more money, besides I am curious enough to find out whether or not I have correctly diagnosed the noise anomaly. I will squeeze the miles out of this Crank case, I am guessing I have at least 50k hidden usable miles to use, but who is to say I hope there is more.