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Re: Roman, regarding question on 2.3L head on 2.0L block Posted by Larry West [Email]  (#1140)  [Profile/Gallery]
(more from Larry West) on Mon, 24 Mar 2003 23:43:18
In Reply to: Roman, regarding question on 2.3L head on 2.0L block, Trobinson9kT, Mon, 24 Mar 2003 10:07:39 Members do not see ads below this line. - Help Keep This Site Online - Signup |
> In my research I learned you can use up to an early '93 with no problem,
> but after that they shortened the block so if you were to try a 2.3 head from
> those engines there is other work you need to do. What that work is I do not know.
The part that changed is where the head and timing cover come together. On the 94- motors, because of space constraints on the NG 900, the whole motor had to be 'shortened'. Since the B234 first came out, the timing chain had gotten closer and closer to the #1 cylinder. In the 94- motors it's as close as they could get. The timing cover on the 94- motors is slimmed, and thus the head had to be changed.
I was going to direct you to a pic on the web, but it's not replying, so I'll try to describe it.
On the B202-B234 93 head, there are two bolts for the timing cover that come up into the bottom of the head. If you can picture the bolts not moving, the head casting is changed to end closer to the timing chain, and the bolts now thread *down* into the timing cover. You could use the later head, but you'll have to make a small plate to cover the resulting hole from the mismatched parts.
> I've read several times the 2.3 head flows better than a ported 2.0, so since the
> cost of repair on mine was going to run close to what I spent on this head I
> decided to get this one.
The 2.3 head casting and the C900 B212 head casting are the same. The inlet ports and exhaust ports are larger than they are on the B202 head. But to take full advantage, you need the corresponding manifolds...
Larry West
posted by 68.39.17...
_______________________________________ Current: 2002 9-5 Aero Kombi Cosmic Blue 2000 9-5 SE sedan, Imola Red 1990 900S Rose Quartz, Auto Past: 1999 9-5 LPT Combi 1999 9-5 LPT sedan 2002 9-5 Arc 1990 900 5-speed 1986 900 turbo Convertible 1991 9000 turbo 1980 99 GLi 1986 900 turbo 1986 900 S 1991 900 turbo 1984 900 turbo 1976 99 GL
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