12-10-2015
Trying to keep my garage organized and clean while taking on this swap has been quite a challenge!




Brought my motor over to my friends shop to use some air tools for the rest




Found a hole in my "A" Cam Tray



As I tore deeper into the motor I realized that this head was
a 2.5 from an M50 and it was really fresh... Then I figured out
that this in fact was not an S52 block either! At this point I'm starting
to get worried that this was the stock motor that came with the car.
I did some research on my own and learned more about how all the blocks
are the same but bored out differently, some of the tolerances are different,
vanos vs non vanos head, advantages, disadvantages, stroke, torque differences.
I took a look at all the stamps but figured I'd attempt to reach out to the original owner
who built the car, sure enough his number was in one of his thousands of receipts.
I could not be more thankful that I was able to get in touch with the original owner.
He explained to me that it's an M52 block with a forged bottom end (S52 crank, con
rods, pistons) and M3 camshafts as well sitting on top of an M50 block he installed only
5,000 miles ago or so depending on how far the new owner has driven.
I was relieved to find that this frankenstein is supposedly intentional.



Trying to keep my garage organized and clean while taking on this swap has been quite a challenge!




Brought my motor over to my friends shop to use some air tools for the rest




Found a hole in my "A" Cam Tray



As I tore deeper into the motor I realized that this head was
a 2.5 from an M50 and it was really fresh... Then I figured out
that this in fact was not an S52 block either! At this point I'm starting
to get worried that this was the stock motor that came with the car.
I did some research on my own and learned more about how all the blocks
are the same but bored out differently, some of the tolerances are different,
vanos vs non vanos head, advantages, disadvantages, stroke, torque differences.
I took a look at all the stamps but figured I'd attempt to reach out to the original owner
who built the car, sure enough his number was in one of his thousands of receipts.
I could not be more thankful that I was able to get in touch with the original owner.
He explained to me that it's an M52 block with a forged bottom end (S52 crank, con
rods, pistons) and M3 camshafts as well sitting on top of an M50 block he installed only
5,000 miles ago or so depending on how far the new owner has driven.
I was relieved to find that this frankenstein is supposedly intentional.




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