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#81
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In regards to the metal, I will take a magnet to it tomorrow and check.
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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" |
#82
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No. Frozen solid in both directions. I've taken it down to the short block and moved the engine from the stand to the cradle for transport. So, I'm not tearing it down further at this point.
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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" |
#83
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take a look at the thrust bearing (#4). "weird feeling in the clutch when downshifting"
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GOOD IDEAS ARE OFTEN FOUND ABANDONED IN THE DUST OF PROCRASTINATION |
#84
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Looks like from that on photo that the Crank weight is up against the block as if the thrust Bearing gave up.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#85
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My Half AN Injun..... |
#86
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But how does that account for the plugs? Not one but 3!
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#87
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Attached are close ups of #4 from one side.
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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" |
#88
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Spun rod bearings.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#89
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That's a real mystery. No idea. I gapped them and then verified the gap on all 8 before install. For the record, my experience is that most plugs have some gap out of the box too. Therefore, I was either sleepwalking one night and closed the gap or something weird happened. Attached are photos. The color difference must be from lack of combustion / proper ignition???
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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" |
#90
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Quote:
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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" |
#91
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Thanks for the responses you pretty much ruled out a ring gap problem I guess.. It will be interesting to hear what your machinist comes up with as he tears the short block down.
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#92
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Is it possible it "simply" jumped time? The timing chain gear had a piece missing - ferrous material.
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#93
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Whatever it turns out to be, it seems to have happened rather quickly as there was no evidence of the shrapnel in the oil filter. Ferrous at that, would have bet it was aluminum. Counterweights hitting the block at high RPM?
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65 Tempest, 400, TH400 86 Fiero SE 2.8 |
#94
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Quote:
Lack of color is from not firing because of the closed gap.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#95
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Oil Galley plug contacting cam gear?
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66 GTO, 495, M22, Strange S-60 w/4.10 Sold new at Royal Pontiac. 70 Formula |
#96
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That main cap doesn't look tight against the block.
And does look like the bearing turned. Clay |
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#97
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#98
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Looking at the photos, it is really difficult to sumise exactly what happened to that engine. From what Tom S said (post #13) I think the machinist will have no problems diagnosing this unfortunate disaster.
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"No replacement for displacement!" GTOAA--https://www.gtoaa.org/ Last edited by 1968GTO421; 09-13-2020 at 12:23 PM. |
#99
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Now that I have had a chance to see some pics, I think you will find a bunch of spun bearings when you open it up all the way. Looks like the thrust main may be spun some based on parting line position. The plugs are not smashed as I suspected, just kissed by the pistons once the rod bearings went away. The entire bottom end looks "tight" visually from the pics. Rod side clearance to cylinder wall wear, you name it. An engine will only live on the tight end of the tolerances if all the machining is dead nuts on, which is rarely the case unless every part is verified, especially aftermarket stuff. Good luck with the outcome. It can probably be fixed without too much expense. Looks like everything stayed attached.
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#100
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Can tell you tried to do meticulous assembly work on it. And a great group of parts I hope you get to drive it again. Spun rod bearing(s) will usually rotate backwards after cool down, and have made plenty of racket on its way south. So its probably locked in the main(s). Maybe why it cracked cam gear at keyway, from the sudden stop of crankshaft. |
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