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#121
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I dropped everything off at the machinist today. The owner is out of town until Friday, and the guys want to wait until he's returned to open it up. Smart.
On another note, I didn't notice, but one of the forum members here mentioned that my thrust bearing had turned and was no longer even with the cap-to-block seam. Photos attached. That is a good eye. Edit - This forum is great and I learn a lot. Thank you all for commenting... I'll update the thread when I hear back from the machinist.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#122
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In the second picture it looks like the rod on the far right is installed with the radius side to the inside not facing the crank side. And the same with the rod on the left closest to the thrust cap in the first pic. May just be the picture.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#123
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I see that too... I hope it is just the photo angle. I can't imagine messing that up, but I can't rule it out without the block here to verify. There was a clear offset, big vs. small, on the crank end of the rods and yes one end faced the crank and the other the abutting connecting rod.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#124
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Been talked about before on here Clay |
#125
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But these pics still don't look right.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#126
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Triple Black 1971 GTO |
#127
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#128
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Yes, I used assembly lube. The machinist gave me a little tin of red and a little tin of yellow. He gave me instructions on which to use for wrist pins, rods, and mains. I also had a can of redline, and two lubes (one dry and one wet) from Total Seal for pistons and bore. The dry stuff for the bores was cool. The wrist pins used double spiro-lox on each side. I cut my hands to pieces, but it was easy assembling them. My 10-yeard old daughter had to stand there and hand me bandaid after bandaid in the kitchen.
I also drissled some break in oil down the crank and counterweigths. The engine was primed twice, once as an assembled long block and again in the car. I had a mechanical oil gauge hooked up. Yes to the beam torque wrench on the crank. I don't remember the rotational torque needed to spin, but it was good. From memory of the feel, 18-22 ft.lbs. The whole assembly rotated beautifuly in the shortblock with the one-piece RMS in. As a postive side note, the engine didn't leak a drop of oil or coolant.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#129
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Curious ... how much run time was on the engine before it saw it's first shake down drive on the street? Was the street drive the first time it saw any substantial rpm?
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#130
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Yes, this was the first real drive with any RPM. I got up to 4K on the freeway.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#131
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You may have answered this or stated it somewhere above but did you use plastigauge on every main journal when you put the thing together? I'm asking for my own benefit here. I've put a couple of Pontiac engines together but not a nice one like that. But am about to. I really feel for you man!
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#132
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#133
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one bad lifter can leave alot of metal
I hope there is minimal damage Last edited by F ROCK; 09-15-2020 at 01:47 PM. |
#134
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Whatever happens ... don't be discouraged about assembling an engine. Although, the farther an engine is removed from a stock condition, the more experience and expertise is needed. Not just because aftermarket parts have quirks that experience will spot, but because the engine is going to be stressed beyond it's designed range and that usually requires an additional level of knowledge and attention.
Personally I'm pretty confident assembling a stock engine but when HP gets up above 450 these engines become a different animal that requires a different skill set. When you find out what the problem was ... dive right back in and make it right. Although you can put me in the micrometer camp .... I can't get plastigage to work for sheeet. |
#135
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Was the block line honed?
Did you seat the thrust and check end play during assembly? |
#136
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For seating the thrust bearing, I used a dead blow hammer and gave a couple of whacks from both sides. My machinist didn't think this was necessary and gave me an explanation of why, but I forget the details. Yes, I measured endplay and it was withing spec, but I am at work and don't have the notes.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
#138
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Read every entry in this blog. Very interesting information and very unfortunate for you. I hope it’s an easy fix. Obviously you’ve heard from a lot of people and a lot of different scenarios of what might’ve happened. Hopefully it’s a spun bearing that allowed the crank to move just a bit to kiss those spark plugs.. The very best of luck for you in solving this issue..
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#139
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Confident
Nice car man. Keep your chin up you're gonna get threw it get it out..Good Luck I would switch out those 48 heads for 6x-4. I might be able to help you.
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#140
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465
Probably a piston to valve problem.
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