In Reply to: 530i rough idle posted by Rodney on July 30, 2001 at 08:55:10:
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.
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.
My 1994 530i has a rough idle. It slightly rocks the car at idle and gets worse when the a/c compressor comes on. I have been to 530i.org and understand what my problem may be. Is there anyway to know what type engine is in the car - I am not the first owner. BMW says they do not have a national data base and there is no way to tell whether the engine has been swithched out? Any suggestions for identifying M60 vs M62? Ideas about other potential causes besides leakdown (maybe I'm in denial), will the problem get worse if unaddressed (I'm now using Amoco Ultimate gas), will it get worse in colder weather, ideas to reduce roughness??? Ideas for less expensive repair than block replacement?