Sunday, November 24, 2019

Corvette Engine - Wrong Intake

While trying to get the corvette started a few weeks ago, I found an oil gusher coming from an exposed oil hole on top of the engine block.  It's not the original engine, but it is the original intake manifold.  Please note, it IS a first generation small block.  My mistake was to assume that all first generation small blocks are identical or compatible.  They are not.  So, it was time to do some decoding.  I grabbed pictures of the ID numbers on the block and on the intake, just to make sure I had the details.

Here's the firing order, just to post it for posterities' sake.

The block offers a little more detail.

So, I have a 14057053 intake manifold (lots of virtual links to 1980-1985 Chevrolet 305/350 engines), and the engine block has V0228TKS engine code that matches a VIN of T4U511082 .  The block ID of V0228TKS looks like it was made in Flint, Michigan.  The 0228 are a date stamp, meaning February 28.  The rest of the letters (TKS) on the end indicate it was a 1974, 1978, or a 1980 small block, and destined for use in a van or truck (on really old engines, the three letter code starting with a "C" for cars and "T" for trucks).  Prior to 1970, the suffix codes were only two digits.  So, we know we are at least 1970 and later.

The VIN part helps us isolate it between the 1974, 1978, and 1980 model years.  The start of it indicates the manufacture target even more.  Starting with a number 1 would be for a Chevrolet, 2 would be for a Pontiac, C for a Chevrolet truck, and a T for a GMC truck.  The second digit of the engine VIN represents the last digit for the year code (number in the 1970's, letter in the 1980's).  The next digit (a letter) represents where the block was manufactured.  I have a "U".  The rest of that VIN code should match to the last digits of the vehicle the engine went into, so I don't care about that.

So, this was a first generation small block engine that was made February 28, 1974 in Flint, Michigan for a GMC 350 truck that was assembled in Hamtramck, Michigan.

Now, if I order a carburetor adapter for a holley 4160, I know to order one for a 1974 GMC 350.

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