small block chevy stamped numbers 19dag1244

A parting line appears at the point where two pieces of a mold come together. The first thing to look at is the flash or parting line on the crankshaft.

The casting number on a crankshaft will identify its application, but there are other features that should also be checked. And that is exactly how you will hear it described, as an '1178' crank by collectors and historians. Many times only the last four digits are on the crank.įor example, number 3941178 crankshaft might bear the engine number, or it might have only the last four digits. First, while cast-iron cranks have a casting number, forged cranks have less prominent numbers that are obviously not 'cast' at all.Īlso confusing is the fact that you can never be sure how many digits of the number will actually appear. 'Casting' numbers on Chevy cranks can be a bit confusing. Many enthusiasts mistakenly believe that every Chevy head with this mark is a scarce 'fuelie' head that was originally installed on a special high-performance muscle car, such as a fuel-injected Corvette.Ĭhevy crankshafts can be divided into several categories: big and small block, large and small journal, cast iron or forged, internally or externally balanced, and round-type or two-piece rear main oil seal. The most widely known of these is the 'double hump' mark found on many different medium and high performance heads of the '60s. Perhaps the greatest cause of confusion with small-block Chevy heads is the external 'casting mark' that many people use for quick identification. The same basic head design has been used since 1955, but significant changes that are difficult to notice at first glance have been made over the years, especially difficult to see when the engine is installed in a vehicle with the valve covers in place. Small-block Chevy heads may be the most confusing and most often misidentified of all major Chevy engine components.

This guide allows you to identify a component by finding the casting or stamped number, then turning to the appropriate section of the book, and look it up.ġ955-1993 Chevy V8 Engine Casting Numbers Catalog, includes support for the engine block, heads, crankshaft, intake and exhaust manifolds, carburetor, fuel pump, water pump, generator/alternator and EGR valve.īook Excerpt: Cars & Parts Catalog of Chevy V-8 Engine Casting Numbers 1955-1993 and Stamped Numbers The second is for the collector who wants to know if a given part will be 'correct' for their vehicle.The first is for Chevy collectors trying to identify a Chevy V8 engine component in a salvage yard, swap meet, etc.The Chevy V-8 Engine Casting Numbers 1955-1993 Catalog, written by Car & Parts Magazine, covers two basic engine identification needs:

Small block chevy stamped numbers 19dag1244