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#1
02-13-2020, 06:15 PM
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What cam is this? Also, engine carnage
I pulled apart a 70 455 I have sitting around. The previous owner said it developed a lower end noise, so he pulled it. Turns out it inhaled some metal pieces (I have no idea what they are) and beat the hell out of two cylinders. They look like the surface of the moon.
One cylinder was spared destruction, as a similar metal piece got lodged between the valve and failed to drop into the cylinder. lol Anyways, I decided to see what cam was in it. The markings are as follows: Rear of cam: 2700202 MAP In between lobes: 51 B3 25 4 D Front of cam: 540 233 Mandatory pics of busted up engine pieces:   
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#2
02-13-2020, 07:27 PM
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Sh!t!
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#3
02-13-2020, 10:28 PM
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Quote:
Each cylinder had almost identical pieces in them, along with that third cylinder that survived because the piece got caught in the valve. It's .030 currently. Hopefully I can get away .040 after machining.
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#4
02-13-2020, 10:43 PM
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Might be good to get cylinder wall thickness checked. I hope it will make .040.
I don’t know how common these problems are, surely the block is ok from whatever happened!!! Hope the block is good!!!
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#5
02-14-2020, 01:18 PM
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I was planning on this being the next engine for my 71. I'm thinking about swapping over the drivetrain in the 71 into another car, so this will hopefully be going in. If it checks out ok, I'm thinking about a healthy roller cam and some Edelbrock round ports.
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#6
02-14-2020, 01:28 PM
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Real hard to guess what it may have inhaled!
But in terms of normal engine parts and not sabotage that item of steel wedged under the valve looks diameter wise like it could be a secondary metering rod from a Qjet. It looks like. Big valve low comp head, like a casting number 96 or 7K3 if it's not the original head from 1970.
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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! |
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#7
02-14-2020, 01:54 PM
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Quote:
Whatever it inhaled, it's got some weight to it for being so small. I thought they were nut driver bits at first.
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#8
02-15-2020, 07:53 AM
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Ah, ok so like a 91 cc chamber.
__________________
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! |
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#9
02-15-2020, 09:46 AM
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Oh boy that's not good!
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Carburetor building & modification services Servicing the Pontiac community over 20 years |
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#10
02-15-2020, 11:35 AM
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Quote:
Quote:
Not doing anything with it just yet. Was bored and decided to pull the heads. So much for a minor lower end noise.
__________________
"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#11
02-15-2020, 10:02 PM
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Most # 64's cc in the low 90's.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.64 @ 87.3 mph on slippery street tires.Bad 2.25 60ft.Owned since 86' |
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#12
02-16-2020, 12:52 AM
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If that was commercially rebuilt it is likey those are steel tumbling media used to deburr castings. There was a thread on the buick forum where one of those fell out of main oil galley into bearing. It wasn't pretty. Those could have been lodged in intake runner forever.
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#13
02-16-2020, 01:07 PM
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All three pieces I've found are all similar in size and shape. They're solid steel square tubes. Very odd. I'll probably disassemble the lower end soon and see if there's more carnage.
__________________
"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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