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Unread 07-14-2006, 08:30 PM   #1
lugnut28
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engine block id number

can anyone tell me what the engine number 604c08 means on my 1986 cj7

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Unread 07-14-2006, 11:33 PM   #2
From78To83
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Check out this site

http://www.geocities.com/cantwait_fo...j_numbers.html
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Unread 07-15-2006, 12:03 AM   #3
lugnut28
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The guy I bought my Jeep from said it had a 1979 engine in it, but If I'm reading the information on that website right, It's saying my engine was built on 04/08/1986 and so it might just be the original engine. Thanks.
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Unread 07-15-2006, 02:09 PM   #4
Geer_hed
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zackly...

604c08

6 | 04 | C | 08

6 - 1986 (or 1973. For 1979, however, this character would've had to be a 3)
04 - April
C - 258 2 bbl (4.2L, 76-89)
08 - 8th Day of the month

OEM 2bbl 258 did not start production until 1976 (eliminates 1973)

Hence:
04/08/1986
258 2 bbl (4.2L, 76-89)
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[center][color=black][b]85 CJ7 / 258 / T176 / Dana 30/ AMC 20[/b][/color]
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Unread 07-16-2006, 11:21 AM   #5
lugnut28
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Thanks for the info. At least I know that I'm not cracking up.
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