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Re: M #'s


>Further to M No's. M249 was designated to the Auto trans later on in the 
>T3 life and earlier it was the number to describe the flat crown piston 
>'S' motors.
>
>Aaron.

My source is the VW microfilm.  This is what I find under the descriptions 
of the M numbers at the start of the microfilm.  It is consistent with what 
is shown in the pistons section where M240 appears under the 83mm recessed 
crown piston and the other piston is referred to as "(twin carburetor engine)".

This is as close as I can find to your description.

M 240  Engine with recessed pistons for                 311-368
       low octane fuel 

M 248  Automatic transmission
       F               -  319 500 000                   311-318, export markets
                                                        361-368
M 249  Automatic transmission
       F  318 015 226  -                                311-314,
                                                        343-346,
                                                        361-364,
                                                        M250:
                                                        315-318,
                                                        365-368
M 250  54 BHP engine instead of 45 BHP engine
       F      221 975  -                                315-318,
                                                        365-368

  
Of course it is possible that the microfilm is in error, or that it was 
"edited" at a some point, eliminating earlier references, but there is no 
sign of that.
I have no personal knowledge of anything other than the late usage of M 249 
to designate the AT.  The AT engines had M236/M249 stenciled in large white 
numerals on the black painted fan intake shroud--just behind the generator 
pulley.  (M236 designating fuel injection)

What is your source?

Jim
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       Melissa Kepner                                    Jim Adney
       jadney@vwtype3.org              jadney@vwtype3.org
                             Laura Kepner-Adney
                             Madison, Wisconsin
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