The Stovebolt Site Forums The Shop Area Engine Shop Need help ID'ing engine.

I have been inactive for long time and getting back to work on my Stovebolt.
I replaced my 216 CID with what I was told is a 235. I am having no luck finding the year on various websites. Hope someone can help.

Engine markings are:

3897004
GM 2

conv1 E2156 0290364T56X

From the 56 in the # I assume it is a 1956 engine. maybe passenger car?

Can someone help?

T56X = 3100/3200 1956 Tonawanda truck engine with standard transmission.

http://chevy.oldcarmanualproject.com/chevyresto/56070.htm

was conv1 E2156 0290364T56X all in one place?

E2156 (this might not be a normal date code)
E = May
21 = 21
56 = 56

TC, No, the conv1 E2156 is cast on the engine block side. the 0290364T56X is stamped on the lip the distributor sits in.

Your help is much appreciated. Now I need to learn what a Tonawanda truck is. See!? I told you i am a newbee. My first guess- Is there a "tonawanda" plant" located in Tonawanda?

AHHHH Thanks to Wikipedia. Found Tonawanda:

Tonawanda Engine is a 3 facility, 3.1 million square feet; 190 acres General Motors engine factory in Buffalo, New York.

What would we do without Wikipedia and the good, helpful people on this planet?

F = Flint, Michigan truck engine assembly plant (where the engine was assembled)

I think the engine blocks and heads were cast in a separate GM foundry/casting plant. Maybe someone knows for sure?

The reason that I asked about the location(s) of the two codes is that it is common for someone to have a replacement engine. A replacement engine might have a variety of codes pressed/stamped into the block, usually because the title/registration might be the old/original engine serial number (a poor choice because engines were often changed).

People have reported a variety of styles of codes in replacement engines. I have one 1954 block where the code has be roughly ground off - it has no engine serial number.

The codes you posted are:
- the block date casting code (cast as part of the block)
- the engine serial number (pressed/stamped into the block)

Here are locations of various codes on 235/261 blocks/heads

The codes that are sometimes of interest when identifying an engine are:
- block casting code
- block date casting code
- head casting code
- head date casting code
- Engine Serial Number

I had this same problem a couple years ago and I never did get it answered . The Casting numbers are the same for both the 235 and 250 . I think someone finally told me that one had domed pistons and on had flat top pistons [ in stock applications] I never did find out what I had , and have to believe there are other more obvious ways to tell the differences .

Nevedone
I think you mean 230 and 250, not 235. Right? They are the same block, and same bore I think (3.875), with different strokes.

Frank50,

I think you are correct, Neverdone is most likely referring to a 230 and a 250.

Frank , Tc yes of course , my mistake . I started a thread on this about 4 years ago that went no where but always wondered about my stated premise .. is there an easy way to differentiate between the two engines ?

Neverdone,

I remember that discussion regarding exterior differences between 230 and 250 engines. As you/I recall, no one had a definitive answer.

Which I guess TC answers at least the first part of Sandollars question..
Dan