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Piston Size?

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Old

Mar 10, 2007 | 09:08 PM

#1

Thread Starter

Junior Member

iTrader: (1)

Joined: Sep 2003

Posts: 93

Likes: 1

From: Warren, Oh

Car: 89 IROC

Engine: 355

Transmission: 5 sp., Alum Driveshaft

Axle/Gears: 3.73 Posi

Piston Size?

Just bought a 350 tpi engine to rebuild, while cleaning up the pistons I noticed on the top of all the pistons is stamped ".030". Does this mean the engine has been bored .030 over? also does anyone know what the crank main journals and rod journals diameter is? thanks

Old

Mar 10, 2007 | 09:18 PM

#2

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Joined: Jan 2002

Posts: 925

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From: Kingsport, TN

Car: '92 RS, '84 Z28

Engine: 383, L69

Transmission: T56, 700R4

Axle/Gears: 3.42, 3.42

Yes that is what that .030 means, and 2.45 and 2.10 is the journal sizes

Old

Mar 11, 2007 | 06:50 AM

#3

TGO Supporter

Joined: Aug 1999

Posts: 14,811

Likes: 1

From: Jackson County

mains 2.448-2.449
pins 2.098-2.099

there's a slight variation depending on which journal you're checking. all the info ought to be in your manual, or you need a new manual.

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