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Join Date: Jul 2025
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identifying old engine

You wouldn't believe this, I found an old 901 engine at a garage sale from a nice man and he hoisted into the back of my car. As a former Porsche 964 owner I know these older engines are special and the owner might want to reunite their car with it.

I believe it's a 1967 901/05 late aluminum case engine. Came with the Webers in a dusty box.

Engine #909851

Anyone looking for this one?



Old 07-28-2025, 07:54 PM
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The Porsche red book states that the engine serial number for 1966 starts at 907001 to 909000 with a 901\05 case. 1967 engine serial number is from 909001 to 912050. yours being 909851 with a 901/05 case suggests that there were cases not used going into 1967 that were put into cars. cool find for sure.
Old 07-29-2025, 10:26 AM
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Thanks for the help @bickyd.

I hope I can steward it back to where it came from if the car wasn't scrapped.
Old 08-05-2025, 08:07 PM
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Cross post this on the early 911S registry. More eyeballs, more better.
Old 08-05-2025, 08:50 PM
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Don't the stars indicate that this was a replacement engine? Or do I understand the significance of the stars wrong?
Old 08-06-2025, 05:23 PM
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Quote:
Originally Posted by fanaudical View Post
Don't the stars indicate that this was a replacement engine? Or do I understand the significance of the stars wrong?
Stars do not indicate a replacement engine.
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Old 08-06-2025, 06:33 PM
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The stars, like the stars or asterisks on VIN stamps, are ‘start’ and ‘stop’ indicators for the number sequence so that it’s obvious if someone tries to add numbers to the sequence later.

Factory replacement motors had an “AT” stamped at the beginning of the serial number to indicate a replacement.

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Old 08-07-2025, 05:28 AM
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