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Re: Its from a 1500, 1502, 1600, 1600-2/1602, 1800 (archive)

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Posted by Al on March 13, 2000 at 00:36:27:

In Reply to: Its from a 1500, 1502, 1600, 1600-2/1602, 1800, posted by or 1802; 2 or 4-door sedan (more) on March 10, 2000 at 17:44:35:

: Tony,

: 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.

: Dave
: 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?

: : Tony


I think the early 1800 was a 84mm bore with a long stroke (2002 crank), which is why it uses a 118 head: combustion chamber matches cylinder bore/ head gasket opening. I think that the 3 series injected head says 1.8i and of course has the injector ports and late casting date, but it just might be from a 316 (Euro only) 1600 carbureted engine, don't know what those say on 'em...do you?
FWIW I e-mailed a guy in Australia who used a 1800TISA head on a 2-liter engine and claimed it ran "all crash hot"...OZ for "good"


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