Jump to content

Meaning of numbers cast in engine blocks


Recommended Posts

I have a 1963 Avanti with a non-original Studebaker V-8 engine. There is no serial number stamped on the boss and I was told the engine was purchased as a short block. Embossed on the engine are the number 1554641 with the number 4 above it. Is this the Studebaker number for the V-8 block? What significance is the "4"?

 

Link to post
Share on other sites

The 1554641 is the Studebaker part number for (probably) the short block assembly. (Can't at the moment find the parts manual that covers it) I don't know the relevance of the "4" (if any).

By the way , is your engine a 'full-flow'? (Does it have a spin on oil filter and/or a block off plate on the right rear side of the engine block?:huh:

 

Edited by mfg
Link to post
Share on other sites
2 hours ago, Regnalbob said:

The 1554641 with the 4 above it is the casting number for the block and not the part number.

 

 

 

You're right and also wrong Bob!....Here's why!.....Although the number 1554641 is indeed cast with the block, it sometimes is also used as the Studebaker part number!

EXAMPLE....The Studebaker Avanti R1 cylinder head had 1557571 cast into it above the center exhaust port....That number also serves as the Studebaker factory part number!:o

Link to post
Share on other sites
22 hours ago, mfg said:

You're right and also wrong Bob!....Here's why!.....Although the number 1554641 is indeed cast with the block, it sometimes is also used as the Studebaker part number!

EXAMPLE....The Studebaker Avanti R1 cylinder head had 1557571 cast into it above the center exhaust port....That number also serves as the Studebaker factory part number!:o 

1554641 is a casting number and not a part number. There is no block with that part number.

Your example is incorrect.

R1 cylinder heads have a casting number of 1557570 and the part number is 1557571.

Link to post
Share on other sites
8 hours ago, Regnalbob said:

1554641 is a casting number and not a part number. There is no block with that part number.

Your example is incorrect.

R1 cylinder heads have a casting number of 1557570 and the part number is 1557571.

I believe we must 'agree to disagree' on this one Bob!:o..........By the way, don't forget to post a few AVANTI TRIVIA questions when you have a chance....Thanks! Ed:)

Link to post
Share on other sites
4 hours ago, 64studeavanti said:

The heads have a casting number of 1557570 and a part number of 1557571. Please check your parts catalog.

Got it!.....The spare R1 head I looked at is unfortunately very corroded from age. (kind of like me!:D)....What I now have no doubt is a '0' looked very much like a '1'!!:o

Thanks for your input on this question!......Ed:)

Link to post
Share on other sites
5 hours ago, 64studeavanti said:

My best guess is that the 3 is an indicator of which mold was used for the casting.

It could also be which shift did the casting.  Studebaker kept track of some things by shift (I suppose in case there was a problem that could be identified with one shift).

Link to post
Share on other sites

Recently, I reviewed an interesting and very comprehensive graph concerning the casting numbers found on Studebaker cylinder heads

This graph was compiled by Bob Johnstone, and can be found on his excellent Studebaker/Avanti resource website.

Bob begins by stating most Stude cylinder head casting numbers are not factory part numbers........"HOWEVER, THERE ARE EXCEPTIONS"!

For what it's worth, I've always thought this to be  the case!.........HAPPY THANKSGIVING!.......Ed:)

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...