The Stovebolt Site Forums The Shop Area Engine Shop Engine Identification numbers

Evening, board!

I know these "engine ID" questions can be annoying, but after an hour trying to figure this one out, including the Inliners site, I realized I'm out of my league.

I found these numbers on a friend's engine which needs a new water pump:

CGN3 K254
(or)
CON3 K254

These numbers are on a plate on the passenger side of the motor, just behind the starter.

The plate right behind the distributor, where I was expecting to find a number, seems blank, though I need to clean it off better to be sure.

ANYWAY, I'm TOLD this is a 1968 235 (!). I didn't know they even made 235s into the late 60s, though it does look substantially similar to my '44 & '51 235s.

I appreciate the help!

-Michael

1962 was the last year of production for the 235 engine. What year is the vehicle you're working on? 194, 230, 250, and 292 engines have 14 cylinder head bolts, 235's have 18 head bolts. It's necessary to pull the valve cover off to count all the bolts, though.
Jerry

Jerry,

I'm convinced you're physically attached to your keyboard - you always respond in an instant!!!

The truck is a friend's 1939 (!) (firetruck). The engine is a drop-in replacement for the original 216 or 235, so no help there.

The reason this is all coming up, is that the waterpump, which is bad, apparently had to be shortened to fit behind the radiator, due to necessary modifications to fit the newer engine. Thinking the engine was a later 235, I purchased a shortened pump, with a narrow pulley (again, truck is not mine, and I couldn't look at it before I ordered the pump).

Not only did the pulley not match (the original has a wide belt, not narrow), apparently the bottom two mounting holes didn't match up. I've got two 235s to eyeball, but I wouldn't know a 261 if it landed on me.

So there's the whole sad saga. I'm trying to figure out which $%&!ing water pump to buy to fix it, whether I need to get it shortened or not.

There are some days when, thanks to these old trucks, I really enjoy my modern, foreign car.

O.K. . . . not that many, really.

-Michael

On my 261, I finally located the id numbers buried under a thick layer of crud right behind the vaccuum advance.
Dave

A typical number of a 55 235 would be 3856233 or 3836340 for a 261. The 230-250 have something like 3854036

What you got is not the casting number or it is no chevy engine.

The casting number should be close to the starter.

Have a look at the pushrod cover.

If it reaches up to the plugs It´s a 216
If it is lower and reaches only under the head is a 235
If it is splitted (2) it is a post 62 engine.

If you got a 235 or 261 you need a short water pump (give Tom Langdon at Stovebot Co a call he also got a fix for your pulley groove problem)

Frank

Thanks, Frank, will do. I'll let you know what I learn.

-Michael

Well,

Did a little digging on the passenger side today, found the proper casting number. Shows a '58 - '62 235. Good to be sure. Not sure what those other numbers tell me. . . .

Now, on to find a water pump with a wide pulley . . .

-Michael