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#1
10-31-2005, 04:17 AM
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Stampings on deck surface?
I just noticed these on both sides of my 73 455's block deck. Each cylinder's deck surface, towards the outside of the motor, is stamped with a "T" or a "P". The "T" stamping is on the rear cylinders. The rest of the cylinders are stamped with a "P"
Is this a factory stamping? What do they mean? Seems like stamping the block face would create some distortion locally.
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Bought: 1970 Le Mans Sport Convertible (second owner,) Palladium silver, 350/2bbl (sigh) with Comp Cams 268H grind (installed by previous owner), TH350 Trans. Mods: Front suspension: Global West negative roll tubular upper arms, Del-a-lum bushings, Koni shocks, 12" disc brake conversion, 1.1" front sway bar, Rear suspension: Global West tubular control arms, springs, sway bar. Exhaust: Flowmaster 2.5" American Thunder system. Mostly complete: Firewall-forward engine compartment restoration Last edited by DIYGuy; 10-31-2005 at 04:26 AM. |
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#2
10-31-2005, 08:37 AM
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Factory stuff. Probably an inspection code. Dunno the meaning.
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#3
10-31-2005, 08:50 AM
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more than likely a piston fitting code for the assembly guys. One guy measures the cylinders and stamps a code on the deck. Chevy uses numbers.
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#4
11-01-2005, 02:37 PM
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Removed the heads on a 72 YC 455, Had the same stampings on my engine only they were all S on the right hand and T,S,T,P on the left hand side
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Its ok to giggle and snicker, Dont laugh and point |
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#5
11-01-2005, 11:55 PM
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Pontiac pistons are selectively fit from the factory. As 74t/a said, it tells the assembler what size piston to install.
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http://www.pontiacpower.org/ |
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#6
11-02-2005, 07:48 AM
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The P is so 'Union guys' know it's a Pontiac so they get the right parts on it.
Bwhahahahahahahahha |
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#7
11-03-2005, 12:35 AM
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Coolness! Thanks, all!
__________________
Bought: 1970 Le Mans Sport Convertible (second owner,) Palladium silver, 350/2bbl (sigh) with Comp Cams 268H grind (installed by previous owner), TH350 Trans. Mods: Front suspension: Global West negative roll tubular upper arms, Del-a-lum bushings, Koni shocks, 12" disc brake conversion, 1.1" front sway bar, Rear suspension: Global West tubular control arms, springs, sway bar. Exhaust: Flowmaster 2.5" American Thunder system. Mostly complete: Firewall-forward engine compartment restoration |
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