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Old 03-01-2012, 02:49 PM   #1
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What year is my 4.0?

I have a 4.0 on my engine stand. Was told it is an 01 but how do I know? Block casting is 0449 and head is 0331. Thanks!

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Old 03-01-2012, 02:54 PM   #2
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Those numbers do equal 1999-2004 components.

The stock cylinder head is cast iron and weighs 60lb. The valve head diameter is 1.91" intake/1.50" exhaust. Casting numbers are as follows:

Year............Casting No
1987-90......2686
1991-95......7120
1996-98......0630
1999-04......0331

Block Casting Numbers

Year............Casting No
1987-90......53005535 (8933002665)
1991-95......53008405
1996-98......53020569
1999-04......53010449

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Old 03-01-2012, 03:13 PM   #3
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So, no actual way to find what year other than the range? Thanks for the info, that was helpful.
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Old 03-01-2012, 03:26 PM   #4
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Quote:
Originally Posted by Mr Mac View Post
Those numbers do equal 1999-2004 components.

The stock cylinder head is cast iron and weighs 60lb. The valve head diameter is 1.91" intake/1.50" exhaust. Casting numbers are as follows:

Year............Casting No
1987-90......2686
1991-95......7120
1996-98......0630
1999-04......0331

Block Casting Numbers

Year............Casting No
1987-90......53005535 (8933002665)
1991-95......53008405
1996-98......53020569
1999-04......53010449
Bolded = what it might indicate.
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Old 03-01-2012, 03:31 PM   #5
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I understand. Was wanting actual vs. range. Thanks again!
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