engine block id number - JeepForum.com

 
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post #1 of 5 Old 07-14-2006, 08:30 PM Thread Starter
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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post #2 of 5 Old 07-14-2006, 11:33 PM
From78To83
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Check out this site

http://www.geocities.com/cantwait_fo...j_numbers.html

'83 CJ-7 Renegade......258, Holley 390, Offy Intake, Clifford 6 into 2 Headers, Clifford Cam, Juicebox TFI, LUK Pro Gold Clutch, Flowmaster Hushpower II's, 4 row radiator, 20 gallon tank, and blazer heater motor so far!!
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post #3 of 5 Old 07-15-2006, 12:03 AM Thread Starter
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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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post #4 of 5 Old 07-15-2006, 02:09 PM
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)

85 CJ7 / 258 / T176 / Dana 30/ AMC 20
My Online Dumping Ground
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post #5 of 5 Old 07-16-2006, 11:21 AM Thread Starter
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Thanks for the info. At least I know that I'm not cracking up.
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