Date registered: Apr 2019
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M102 Engine Cylinder head compatibility
Just signed up to these forums, having been a lurker for some time.
I have a W123 Coupe which has an M102.985 engine (2.3 out of a late 80`s 190) instead of the original M102.980. Now the M102.985 has a blown head gasket due to overheating - I suspect the head is warped, possibly beyond what a resurfacer can salvage.
I also have a M102.962 (2.0 out of a late 80`s 190) which is a good engine, but I don`t want to lose 300cc worth of screaming performance (!) and was hoping I could use the 962 head on the 985 block to create one good 2.3 engine.
I have the engine service manuals for the M102.985, which states:
The same cylinder head is installed on engines 102.9221924 as on engines
102.962/982/985. Only one cylinder head version is supplied as a replacement part. This cylinder head must not be installed on the previous engine 102.961. "
This suggests that I can use the 962 head on the 985 engine, but as far as I know the bores are different, which makes me suspicious as to whether this is true.
Does anyone know definitively if this is / isn`t possible.
Thanks in advance.