Engine Serial Number

[Paul Bunch]

I am trying to find out what year and size V6 GMC engine a friend has and all I have to go on is the engine number. The number is WG2 247G675 the engine is running a hammer mill and has not been in a truck for years. Any help is appreciated.

[bigblockv6]

Doesn't sound like an engine serial number, the correct engine ID number is below the front right bank cylinder head, thee is a machined boss were the number is stamped and the first 3 digits will be the displacement of the engine.

[bigblockv6]

Originally Posted by bigblockv6

Doesn't sound like an engine serial number, the correct engine ID number is below the front right bank cylinder head, thee is a machined boss were the number is stamped and the first 3 digits will be the displacement of the engine.

The numbers you supplied seems to be cast into the block as part numbers the 247 prefix is definitely a GMC part number of that era, like I mentioned previously the engine ID number is stamped. The numbers after the displacement may give a clue to what year it is. Lewis Matkin is the only one that can determine the ballpark figure of the year by those numbers. You may want to look at the intake and exhaust manifolds, there's dates cast on them that will also give you a ballpark figure on what year the engine is.

[AZKen]

Paul, BBV6 advised earlier in this post to check intake and exhaust manifold cast numbers. Is that what the number is from?

[Paul Bunch]

The engine belongs to someone else and he gave me the number so I do not know at this time where he got it. I will try to get the proper number later. Thanks