1st gen/323/GLC Engine and Drivetrain Engine/Drivetrain Modification Discussions for 1990-1994 Models (BG chassis) and 1981-1989 GLC/323 Models (BD and BF chassis)

Can I put a DOHC head on my SOHC block

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Old August-29th-2004, 10:51 AM
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Can I put a DOHC head on my SOHC block

I know this has been discussed in a few threads, but I'm still not sure,
I live in tenerife, Canary Islands and have aquired an '89 Mazda 323 1.8 16v SOHC, but the cylinder head is split and isn't repairable.
The problem is there are only 4 scrap yards on tenerife and there are no SOHC 323's in any of them, but there are 2 DOHC 1.8 16v's.
I'm not interested in any performance gains or fitting turbos, I just want the cheapest option to get my car back on the road, and shipping a SOHC head from the UK where I could get one easily would likely be more expensive than getting a DOHC one from here, even if I had to replace the manifolds and ECU.
The engine no. on the block is BP117561
and on the SOHC head is stamped BP01.
The main issue I can see other than the size and shape, would be the cambelt tensioner pullies, the DOHC understandably has 2 where mine only has 1.
I will remove this thread once I'm certain, as it has been discussed, but I am unclear from reading other threads whether it will work for my engine.

Many Thanks.
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Old August-29th-2004, 10:55 AM
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Yes it will work. However the combination of the SOHC short block and the DOHC head will result in a lower compression ratio. You would do well to just swap the entire DOHC engines plus the appropriate hardware that goes along with them IE the harness, ECU manifolds etc.....
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Old August-29th-2004, 09:04 PM
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I don't have the facilities to swap a complete engine, it was awkward enough getting the head off.
And what about the tensioner pullies, as far as I can tell, my block will only take one.
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