Jump to content

1937 Packard V12 Engine Number location.

Tom Laferriere

Recommended Posts

Glad I could help Tom. As far as I know all 37s had aluminum heads, as a general rule the steel heads were 34 and earlier. I have a couple of engines with High Compression heads and they don't have these letters, and I have seen two other cars with them which didn't have special numbers either. Are your heads marked "HC" and what size is the carb? The stars are typical, but I can't say that I have seen any letters after the number. The 38s have a single "A" before the serial number, 39s a "B", but not after, and the "A" looks just like the ones after your engine number. On 6s and 8s they sometimes used letters after to designate cam and lifter series, especially if an engine had been rebuilt and they had been changed, but there again, as far as I know there was only one cam used in the later series 12 engines. It could be possible that this was to denote that the engine had been changed and the same serial number kept, or rebuilt, maybe even at the factory. Packard did use letters, including double letters to indicate piston size, but those are usually on the deck of the block near each cylinder. There is also usually what I assume is an assembly number on the manifold deck face on the right rear, and is a 3 or 4 digit number. Packard doesn't mention this number in manuals and I have never met anyone who can tell me what it is, so I assume it was only used at the factory. Hopefully someone here can tell us. I work with a man who has been rebuilding 12s for over 40 years - I will ask him if he knows. Sometimes when there was a recall, the replaced part would be marked with a letter to confirm that the job had been done - 1935 12 oil filter/coolers were recalled and the new ones were marked with a "C" on top of the housing, so this probably meant something to them.

Link to comment
Share on other sites

  • 10 years later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...