Help Identifying an engine

[helosixx]

I've got a question about the serial numbers on this motor. The 652 number is obviously stamped in after the fact as the motor would have been an early 66' motor and was last in a 72' car.
The type is 901/05 but the serial number on the front is 218028. Has anyone seen a 218 serial number before?

thanks in advance for the help.

[HughH]

I am not sure what you have there. My understanding is that 218xxxx engines are for 1968 T sportos ..... but firstly they have 4 numbers after the 218 not three and secondly they do not correspond to 901/05. They should be on a 901/13 I think (the 1 in 13 being for sporto along with the 1 in 218 being for sporto). Also shouldn't the "218" number have a star at each end and the number start at the bottom and go up on the fan support rather than apparently starting at the top and going down?
I suppose the top star and first number could have "disappeared" - if it had been a 6 the balance of the number would be for a 1971 E sporto (6218028) but again it would not match any of the other numbers on the engine and it would be stamped in the wrong place

901/05 engines should have an engine number starting with a 90 (or 91 for a targa) certainly not a 652 number which I think should be a 1972 911/57 engine (from a T).

The series number next to the 901/05 type number looks like 4005 on my screen. If so this thread would place the corresponding engine number as being around 907150

[NeunElf]

I think the 901/05 was late '66 through early '67.

I have no explanation for 218028 but shouldn't the engine number be preceded by a star as well as followed by a star? That serial number doesn't look quite right. I think the number just below the "901/05" stamp is the "build number" (see Type 901/xx Engine Build #'s).

If I'm correct and that's the build number it also looks a little sketchy. If it's 4905, that ought to correspond to engine approximately # 908037 according to the thread Type 901/xx Engine Build #'s.

[helosixx]

We are thinking this is probably a replacement motor that came blank on the serial numbers. The first 218 number was added and then when the engine was again moved the second 652 number added.
Yes I believe you both are correct. It should have stars at both ends. Also, the font for the 652 number is way wrong from what I can see.
As far as I can tell its a 66' motor with a 4005 build date. The carbs were also changed to IDTP webers.

Thanks for your help!

[JimVillers]

Interesting, my 901/05 engine serial *907782* has the number running from bottom to top verses top to bottom. He does not have 901/05 accessories (fan housing, coil mount, air cleaner etc).

[NeunElf]

Interesting, my 901/05 engine serial *218028* has the number running from bottom to top verses top to bottom. He does not have 901/05 accessories (fan housing, coil mount, air cleaner etc).

The surface into which engine number 907782's stamped looks rough cast and the edges are slightly rounded. Engine "218028" on the other hand (now that it can be compared to another engine's photo) has the engine number(s) on a smooth surface with crisp edges. Could someone have taken a file to that piece?

[preS]

what is the number under the 901/05 ? 4005 as Hugh thinks it is?

Richard