Quote:
Originally Posted by NeighborsComplaint
It's been a great run Mikey. Your enthusiasm and claims of owning a 1 of none 1967 428 HO Tripower mystery motor has provided invaluable entertainment.
Mikes reply:
I am not here to put on a show for anybody nor am I wasting your time and I do have a Manual and I do read it etc...
However, it's time to get in touch with that reality. We as kids thought it served no purpose, than to spoil our fun. Time to take the motor to a professional and flush all your theories down the toilet.
Mikes Reply:
I can't afford to pay a Mechanics wage and I would not let one near my Car. I am in reality at all times, those who think that I am not, should check themselves, before casting those aspersions at me.
It's time to determine if the rods are installed backwards or just the pistons. Unless you know what, you are looking for or have a Rod to reference, you won't know the difference. Both sides of the rods have a chamfer. One side is "eased" to prevent stress cracking from a sharp edge, The other side has a much larger chamfer intended to be installed facing the counterweights and allowing the rod to ride over the fillet all the way to the counterweight.
When you install the rods backwards, there is no chamfer to clear the fillet on the crankshaft and secondary, thrust wedges the rod bearing into the crank fillet, causing the cap to displace and create a sharp edge, contact point between the rods on the same journal and ultimately seize the rod to the crankshaft.
Mikes reply:
Good stuff.
I have every confidence that your "ghost noise" is one rod face bouncing over the edge of the displaced cap, at low RPM. At higher RPM, it becomes masked by other mechanical noises within the engine and just becomes an odd whirring or scuffing. This sound, that seems to follow the engine RPM but seems oddly out of synch with it.
Mikes Reply:
Better stuff.
The noise will eventually go away, once the engine goes silent, after you spin a rod bearing or two and seize the crankshaft.
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Mikes reply:
I won't wait that long, thank you!
I am reading about the Pistons and Crank as we speak and that piece of information says it all. I need reasons "not" just do this and that and then I jump. Thanks, and I will be posting later. I have been searching for the differences and I especially find that the Pictures in the 1967 Pontiac Service Manual, that were posted to this forum, were incorrect at least and confusing. One drawing has you standing in the front of the car, the other is viewing as if you're sitting in the driver's seat. Also, I took two years of AutoCAD in Mechanical and Architectual drawing and recieved an "A" for my effort.
The Draftsman, of the poor Images of those Pistons should have simply called out the offset and pointed to it. He also should have drawn an arrow from which the Eye was looking from. How many Pontiac Engines were built wrong from those Pictures, is unknown. I am at least content that this Motor works, because on the other hand, it should have been seized, a long time ago. This is why they can't make me believe that I am in any immediate danger. I am "not" saying they're wrong and some people have convinced me that this Engine can run the way it was built, these parts did not start hitting each other, that's bull.
By this weekend the Flexplate will be installed. I have already obligated myself with that one and I should be Testing and Tuning by next week. The effects that the Flexplate has on the noise issue is to be discovered. Then What is next?