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Unread 01-05-2014, 06:26 AM   #1
turkish6
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Engine Code Help

Hey Everyone,

I was looking at some other posts and websites about what the engine codes mean and I wanted to check mine out but I couldn't make any sense of it.

My code from the right side of the engine is

H
3218618

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Unread 01-05-2014, 06:39 AM   #2
Matt1981CJ7
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I don't think that's the correct code, Turk. Most have 6 characters (5 numbers and 1 letter). Here's an example:

The Engine Day Build Code consists of six characters:

1. Year built code
2 & 3. Number of the month
4. Engine size/type code
5 & 6. Day built

Thus, "409C21" indicates 1962, September, 195.6 OHV (cast iron), 21st day. The
only way to determine the year is 1962 instead of 1971, 1984, or 1992 is to know that
the 195.6 OHV engine was discontinued after 1965, and what a 195.6 looks like (very
different than the 199/232/258). Most codes do not overlap very much. For those that
do (such as 3 -- 1961, 1970, 1979, 1983, 1993) casting numbers may have to be
consulted if the engine date is important, such as for a restoration.

Hope this helps,

Matt
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Unread 01-05-2014, 06:48 AM   #3
turkish6
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I assumed I was doing something wrong. Here is a picture. Am I looking in the wrong area?



image-2071334017.jpg
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Unread 01-05-2014, 07:16 AM   #4
Matt1981CJ7
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I'm not sure where that pic is taken.

The engine code should be on a machined surface between, and slightly below #2 and #3 cylinders.

Matt
0900c1528008a7c4.gif  
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Unread 01-05-2014, 07:20 AM   #5
turkish6
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That was taken on the driver side of the engine. Looks like I need to check the other side.
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Unread 01-05-2014, 08:35 AM   #6
turkish6
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So i just took a look again and found the machined surface. I never noticed it before cause it's barely readable. From what I could make out
E on top
51109 no letters between 11 and 09 but there is a slight gap
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Unread 01-05-2014, 12:52 PM   #7
WindKnot
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Well, life is getting interesting. It looks like we need more information than we have.

The engine code implies that you don't have a 258 I-6, but rather a 232 I-6 made on Thursday, November 9, 1972. The code also says it was built with a 1 barrel carburetor. The 232 And the 258 were both built with the same engine block.

Your VIN can tell us how your Jeep left the factory. If you like, we could decode that for you too. It will tell us which engine it was built with along with what kind of transmission. We don't need the whole number; you can omit the last 4 digits (part of the serial number) if you'd like.

The engine in your Jeep- what kind of a valve cover does it have?
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Unread 01-05-2014, 05:21 PM   #8
turkish6
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That's a bummer. I had decoded the vin when I first got it but maybe I made a mistake so here it is.... Thanks VIN= 1JECM88E1CT008035

image-2312313764.jpg
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Unread 01-05-2014, 07:03 PM   #9
WindKnot
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1JECM88E1CT008035

The VIN doesn't match up for 1982. The 3rd character is wrong.

1 = Made in USA
J = Jeep
E = DOES NOT FIT IN VIN Should be C, D or T (Most likely C for Utility Vehicle)
C = 258 CID 6 Cyl 2 BBL Carburetor
M = 4 Speed Floor Shift Part Time 4X4
88 = CJ8 Open Body
E = GVW 4150 LBS
1 = Internal Factory Code
C = 1982 Model Year
T= Toledo, Ohio Assembly Plant
008035 = Serial/Sequence Number

Looks like (without physically checking) you have a replacement engine that may not be a 258, but rather a 232. Do you have a steel, plastic or aluminum valve cover?
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Unread 01-05-2014, 07:19 PM   #10
Always2L8
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The third place "E" is for an export model - left hand drive. I think Turkish6 gives a hint that he may be not in the US? The sequence number seems low. My 82 Scrambler is in the 62,000's, but exports may have been listed differently. I tend to agree that a replacement engine or block may have been installed at one time. One of life's mysteries.

Good Luck
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Unread 01-06-2014, 02:09 AM   #11
turkish6
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Yes it's an export. I guess at some point the engine was replaced. Bummer I was under the impression it was original. My fault for not doing my homework. At least she runs good (for now)
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Unread 01-06-2014, 01:14 PM   #12
turkish6
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Valve cover is steel
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Unread 01-06-2014, 04:14 PM   #13
WindKnot
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That valve cover just confirmed suspicions.

The engine wasn't the original engine to your Jeep. Also, as far as to whether it's still a 232 or a 258, it's really hard to say. Both engines share many parts as well as the block. I know for certain the crankshaft is different, but I'm not sure what else is. Who knows what the previous owner did?

I'm sorry I can't offer more. Perhaps someone else knows of a way of knowing whether the engine was 'stroked".
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Unread 01-06-2014, 04:26 PM   #14
FLynes
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Quote:
Originally Posted by WindKnot View Post
That valve cover just confirmed suspicions.

The engine wasn't the original engine to your Jeep. Also, as far as to whether it's still a 232 or a 258, it's really hard to say. Both engines share many parts as well as the block. I know for certain the crankshaft is different, but I'm not sure what else is. Who knows what the previous owner did?

I'm sorry I can't offer more. Perhaps someone else knows of a way of knowing whether the engine was 'stroked".
Not without cracking it open. Personally, I'd be happy that it has the steel valve cover and not that plastic piece of crap.
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1976 CJ-5
Lime Green
Black Wellington Vinyl Bench Seats
258 I-6 1bbl
T-150 3-Speed
3.54:1 Open Gears

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Unread 01-06-2014, 10:37 PM   #15
turkish6
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Thanks for the info guys. I am bummed it's not the original but it runs and is going a good job for now. When I get to cleaning and tuning the engine I will investigate deeper as parts start coming off. Thanks again
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