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ID an engine by the numbers?

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Old May 9, 2008 | 09:43 AM
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Default ID an engine by the numbers?
Just in case things don't go well with my glass bead removal project, I picked up a complete replacement engine. Good runner with 90K on it. Very dry, no leaks anywhere.

The seller claims it is an 82' 4.7 Non-"S". I was looking for a simple 4.5 and I think that is what I have. The number is M28103 8290490. Can anyone tell me how to decipher the numbers?

How would this engine be better or worse than my original 79' ? Cams the same? Compression the same?
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Old May 9, 2008 | 09:59 AM
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Its very likely M28/03, not M28103. This means its '78-79 US 4.5L engine.
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Old May 9, 2008 | 10:49 AM
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Originally Posted by Vilhuer
Its very likely M28/03, not M28103. This means its '78-79 US 4.5L engine.
Thank you ! In that case, I got exactly what I wanted.

What is the significance of the 2nd, lower row of numbers? ( 8290490 )
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Old May 9, 2008 | 11:01 AM
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engine serial number; sequentially increased by one for each engine built starts at xxxxxx

Marton
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Old May 9, 2008 | 11:04 AM
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Originally Posted by marton
engine serial number; sequentially increased by one for each engine built starts at xxxxxx

Marton
So the 82 in the beginning of this serial number does not denote the model year?

I am guessing that is what the seller was thinking.
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Old May 9, 2008 | 11:26 AM
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Go to www.928gt.com under Tips/Links and Tech spec.
Dave has all of the engine codes listed by year and type.
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Old May 9, 2008 | 11:28 AM
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the first 8 is for 8 cylinder

For details according to PET

HTML Code:
VEHICLE TYPE__________TYPE___MY_____ENGINE NO.TECHNICAL DATA
928___________________M28.01 79 9 819 0001>5000 8ZYL/4,5L/177KW
928 M249______________M28.02 79 9 819 5001>9999 8ZYL/4,5L/177KW
928 (USA)(CDN)(J)______M28.03 79 9 829 0001>5000 8ZYL/4,5L/169KW
928 M249 (USA)(CDN)(J)_M28.04 79 9 829 5001>9999 8ZYL/4,5L/169KW
Cheers

marton
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Old May 9, 2008 | 11:36 AM
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Whups- posted errantly to old thread.
Copgrats on the spare, cherish those '79 cams.
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Old May 9, 2008 | 11:44 AM
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Thank you all. Good info, as usual
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Old May 9, 2008 | 07:03 PM
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As second row says its 490th '79MY manual gearbox engine for US market. Its possible numbers didn't start from 0001 even though factory papers say so but its certainly in the middle of '79 MY production. Very likely made in late 1978.
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