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Irwin A with a tip for engine swap

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#616058 - Tue Feb 02 2010 11:52 AM 235 Engine Identification
Scout Offline
New Guy
Registered: Thu Feb 09 2006 12:00 PM
Posts: 16
Loc: Bellevue, Washington
Hi All,

I have a 1953 3600, but it does not have the original 216ci engine. Rather, the engine is a 235ci. The most I've been able to determine is that the engine is a standard 235 model and was made on Feb. 6th, between 1957 and 1962. Apparently, from 1957 on forward, chevy 235ci engines stopped using serial numbers.

So, how do I determine the actual year of production for this engine? I have the following information from the engine block: Casting # = 3769716, Engine ID = F0206A, and two other strange things cast into the block and located below the Engine ID boss --> They are CON 4 and B52.

Can anybody shine some light on my confusion?

Thank you
#616065 - Tue Feb 02 2010 12:00 PM Re: 235 Engine Identification [Re: Scout]
Hotrod Lincoln Offline
Extreme Gabster
Registered: Mon Feb 23 2004 12:00 PM
Posts: 13168
Loc: Dellrose, TN
There is a machined pad just behind the distributor with a stamped number on it. The letter prefix at the beginning of the stamped number should identify the year of manufacture, and other details about that specific engine. There are several websites available with engine number decoding information, just google "Chevrolet engine numbers".

EDIT: Try this link:

Better re-check that casting number- - - -you might have a 261 engine instead of a 235. If so, that's a real find! The casting number you list differs one digit from either a 235 or a 261 number.

Found it! The Inliners' site lists your casting number as a 60/61 truck 235.

Edited by Hotrod Lincoln (Tue Feb 02 2010 12:19 PM)
When you dial 911 do they send out a lawyer with a restraining order?

Matthew 7:6

#616089 - Tue Feb 02 2010 12:43 PM Re: 235 Engine Identification [Re: Hotrod Lincoln]
waldo53 Offline
Shop Shark
Registered: Sat Dec 09 2006 12:00 PM
Posts: 1707
Loc: ID
You're right about the serial no.s after '57, they just don't help much in ID'ing your engine. But, I think the B52 marking tells us the story, cast date of Feb 5, 1962.

If that's wrong, someone else will surely set the record straight.
#616154 - Tue Feb 02 2010 04:08 PM Re: 235 Engine Identification [Re: waldo53]
tclederman Offline
Registered: Tue Sep 18 2001 12:00 PM
Posts: 23573
Loc: Jarvisburg, NC

I think that the 3769716 block casting code (235 ci block) was used from 1958-63.

As waldo53 posted, the date casting code is the clincher (1962).
#619874 - Sun Feb 14 2010 01:54 PM Re: 235 Engine Identification [Re: Scout]
BROTT Offline
New Guy
Registered: Sun Jan 03 2010 01:43 PM
Posts: 11
Loc: California
hello all my first post, want to know what year my 235 is cast# 3886848 eng# F0408J
#619884 - Sun Feb 14 2010 02:14 PM Re: 235 Engine Identification [Re: BROTT]
LONGBOX55 Offline
Master Gabster
Registered: Mon May 08 2006 12:00 PM
Posts: 9424
The A code in the serial number denotes it's a Passenger application.
Bill Burmeister
#630830 - Sun Mar 21 2010 10:59 AM Re: 235 Engine Identification [Re: LONGBOX55]
Scout Offline
New Guy
Registered: Thu Feb 09 2006 12:00 PM
Posts: 16
Loc: Bellevue, Washington
Thanks to all for your help and information!

Looks like the engine block was cast in Flint, Michigan on February 5th, 1960/61/62 (conflicting websites abound) and that its intended role was "Standard" (as designated by the 'A' serial number suffix).

So this little truck rolled along for almost a decade and then had its original 216 replaced by a plain jane 235.

Excellent nostalgia!
#677218 - Sat Sep 11 2010 08:46 PM Re: 235 Engine Identification [Re: Scout]
fosters51deluxe5 Offline
Shop Shark
Registered: Sun Apr 11 2010 12:56 AM
Posts: 165
Loc: NE tacoma, Wa
hi all,
i have a 51 chev 5 window. it also has a 235. dont have the casting number but next to the distributor is #FO215JC. can anyone tell me what year the engine is from?? thanks

gig harbor wa
#677242 - Sat Sep 11 2010 11:00 PM Re: 235 Engine Identification [Re: BROTT]
hoyt Offline
Shop Shark
Registered: Fri Jun 17 2005 12:00 PM
Posts: 391
Loc: Kirkwood, MO

Where was the casting number 3886848 found? The block casting number reference that I use do not have that number. However, 3836848 is the cylinder head number for most 1956 and later 235 engines. Look at this serial number reference for the FO408J decoding. The engine casting number is on the lower forward passenger's side of the block. The casting date code on the block by the starter is also useful. Look at Tim's great site for more useful information.

#686489 - Fri Oct 15 2010 05:39 PM Re: 235 Engine Identification [Re: hoyt]
nrdesieyes Offline
Shop Shark
Registered: Wed Sep 08 2010 02:53 AM
Posts: 352
Loc: Santa Cruz, CA
Hey all, I'm totally perplexed by this one. A guy is selling what he thinks is a 1952 Chevy 235. The numbers on it are:


I can't find either "3701887" or "375583" on the list of casting numbers at or

Any ideas on what these numbers should be telling me? What the heck is this motor?


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