Where are the casting numbers on a big block Chevy?
Locate the six- or seven-digit number on the cover of the engine’s timing chain. Locate the casting number in between two bolts directly under the GM logo.
How do I identify a Chevy 454 engine?
How to Identify a GM 454
- Identify the year and model.
- Look for decals on the engine.
- Locate the engine ID number located at the front of the engine block on the passenger side.
- Decode the ID number.
- Verify the casting numbers from either the cylinder head, intake manifold or crankshaft.
How do I identify my big block Chevy?
The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. All Big Blocks are stamped there. Small Blocks are stamped on a pad in front of the passenger side cylinder head and are often covered by the alternator.
How can you tell a 454 4 bolt main?
Someone once told me that you could tell the difference between a 2 or 4 bolt main by looking at the size of a hole on the side of the block. If the hole is small, it’s a 2 bolt and if it’s large, then it’s a 4 bolt.
What year is a Gen 5 454?
Here’s a pristine Gen V 454 from a 1990 Chevrolet 454SS pickup. Gen V, introduced in 1991, included a superior one-piece main rear seal, new oiling passages closer to the cam, and all blocks received four-bolt mains.
What year is a Gen IV 454?
In 1987, a new 454 Mark IV hit the market with EFI, exclusively in trucks. See all 28 photos Photo: Courtesy of Barrett-JacksonIf you notice, the name changes with the Gen V. The Lincoln model line purchased the naming rights to “Mark,” forcing Chevrolet to refer to the big-block in generations.
How do you know if its a BBC block?
How can you tell a 5.3 block?
The 4.8/5.3L motors are easy to identify by their large 4.8/5.3 casting mark on the front of the block, but there is no simple, external way to differentiate the 4.8 from the 5.3. The best way is to yank a head and measure the stroke.
How do I know if I have a GM V8?
All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. V8 codes are stamped on a pad just forward of the right side (passenger) cylinder head.