In Reply to: What is a 118 cylinder head?` posted by Tony on March 10, 2000 at 14:10:33:
What year is the car you're looking at? Does the tail badge or VIN plate say anything other than "2002"?
The 118 head is used for all of the models I listed. It has a different combustion chamber shape than the 121 head, has smaller valves (?), and smaller intake & exhaust ports that are of a different shape (oval holes as opposed to TV-shaped ones). It's not as good of a head to use unless you are adapting to 318i injection, I guess (I forgot if 318i ports are 118-style).
The 118 head on the 1600-2/1602 was bolted to a small-bore block with an uncounterbalanced (unless '71 1602) short-stroke crank.
The 1802 had a large-bore (2002-style) block, with the short-stroke crank.
I don't know about the 1502. You might be able to throw a 118 head on a 2-litre bottom end (big bore, long stroke), but I'm not sure if the 121 or E12 or E21 pistons would clear it. It would reduce power.
About the models I listed in the subject line:
The 1500/1600/1800 sedans were 4dr. (FYI)
The 1502/1600-2/1602/1802 are 2-doors, just like the 2002 body. The 1600-2 is confusing because it has a "BMW 1600" or "1600" badge.
So basicall the motor you saw could be 1.6, 1.8, or (not likely) 2litres in displacement.
2x '68 1600-2
: Just saw a 118 casting on an 2002 cylinder head. Can someone clarify? Is this a 1.8 1802 head on a 2.0 litre motor? Is this done often?