In Reply to: HELP - Nikasil v.s. Alusil posted by wannabimmer on October 15, 2001 at 10:33:36:
My wifes 93 740il has 143k miles on it w/ the original block, still runs smooth but I would not buy another one with the original block.
Here is how to tell for sure if the block has been replaced:
That part is fairly easy. But it requires getting under the right front of the car. All M60 and M62 blocks have casting numbers on the right side, directly alongside the 3rd cylinder, slightly above the coolant drain bolt. You will need a long screwdriver to move a small wire bundle out of the way. Some people say that you can see the #s from above with a mirror.
These are the casting numbers to look for :
Nikasil M60B30 1 725 970 or 1 741 212 old
Nikasil M60B40 1 725 963 or 1 742 998 old
Alusil M60B30 1 745 871
Alusil M60B40 1 745 872
Alusil M62B44 1 745 873 NOTE, all M62 engines are Alusil.
This is the only way to determine which M60 you have, short of removing a cylinder head.
I have a opportunity to buy a '94 540i with 82K mi for $12,700, but original Nikasil motor. Car is in excellent condition, idles smooth and runs great. What should I do?