I'm a littlllle late, but... :-)
On the thread from last weekend about the head gasket leaking oil at the
left-front corner of the block, where the oil to the rockers goes through...
I seem to recall hearing that the Mini Cooper-S engines had an extra
head bolt/stud added at one corner. Was that what this was for? Or was
their compression so high they -really- needed it?
A semi-related question...
Are the Cooper-S pistons reasonably useable in a street engine these days,
or is the compression too high for our current 'premium' fuel?
It's my understanding that these pistons have a -slight- dish in the
crown; while the '67 Spridget 1275 stock pistons have slightly more dish
(8.8:1?), and the later (8.0:1?) 1275's had even more dish.
A friend of mine who -should- know what he's talking about wants me to
put Cooper-S pistons in my next engine; while I think I should stop at the
'67 (8.8:1) pistons.
This is an academic question. I have no immediate plans to actually -do-
anything about this stuff.
Ed in NC
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