The Stovebolt Site Forums The Shop Area Engine Shop How do I tell what 6 Cylinder I have

The truck is a '62, C10, 3 Speed, Long / Wide Bed that was sold new here in North texas as a "Fleet Truck". I have heard that there were several different sized in-line 6 cylinder engines. How do I tell what size mine is??

62 is the last year for the 235 and is most likely the engine you have being a C10. There is a flat spot on the block directly behind the distributor with numbers stamped on it. Post these numbers and someone will identify the engine.

How many valve cover bolts does it have?

If I recall it has 6 flat head screws that bolt down the valve cover. I just tweaked them down and I believe there was 6 of them. I will double check tonight when I get in, post a picture, and see if I can't locate the numbers stamped behind the distributor. Thanks!!

I'll hijack a thread. Have a '48 6100, with i believe a 235. Only numbers that I could find were B53 848 850 above and to the front of the distributor and 3836848 cast onto the head. I've looked at the post on here and at inliners and can't figure out what motor it is. hoping someone can chime in and answer.

thanks

The block casting number is sometimes under a ridge and forward of the fuel pump making it hard to see. That's where I found my 3701481. I've read where you can lay a piece of paper on it and rub it with a dirty, greasy finger and get the number transferred.

"Hidden" block casting number.

aggie jon -
Your number: B53 848 850 is not an engine number, but the head number indicates it is a "848" head, the desirable head, from 58-62, used on many of the earlier engines to enhance performance.

hmmm, interesting. Did not realize that this was not the original engine. not surprised. now i am really intrigued.

The 194, 230, 250, and 292 have seven valve cover bolts.

Joe

Aggie-Jon,

I hope I'm not spreading misinformation, but I've always thought that a casting like your "B53" gives you the date of casting. B53 = Feb. 5, 1953.

Of course, that only worked for a certain 10-year period. I don't know what they did in 1963.

The 235 in my '48 had a B33 casting (Feb 3, '53). LAQ83376 was stamped on the flat spot behind the distributor. The head was B23.

My current 261 has an A241 casting (Jan. 24, 1961?) in addition to a 3769925.

That longer casting number will give you the engine size.

After some further review and selection, I found the following numbers - 05(6 or 5)(8 OR 3)83(I or T)F547

Most likely 05683IF547. Was hard to read with bad light and dirty cast. Maybe I can get inside the ballpark.

I always thought the 3836848 was a 1956 235 head that was used many times as a replacement head for warranty work, etc.

http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/1916-57cast.html

1956 3836848 235

The "B53 848 850 above and to the front of the distributor" has never been satisfactorily explained/decoded.

The 3836848 head casting code was used on 235 engines from 1956 through 1963. And, as posted by Big Tee, it was also the code on replacement heads for high-pressure 235s from 56 until they stopped making them. The date casting code on those heads would be a clue as to the head being original or a replacement.

Call Patricks's and get their catalog. It has a whole section on casting #'s and years built. Best of all it's free!