[Fot] mechanical mystery

[KENMUN at aol.com]

fot, i'm in the process of disassembling my tr3 vintage racer motor to find 
 the source of water in the oil and overheating. so far i've found a crack 
in the  #4 liner (it goes from the top down about 1 1/2" ), the #4 piston 
has a slight  indentation in the top as if it has contacted the head, the 2 
compression rings  are broken and the piston is cracked in the area between 
the compression ring  groves. i think the cracked liner explains the water in 
the oil and overheating  but, why did it crack? and how are the piston and 
ring problems related to the  liner crack? the motor is 87mm, 10.5/1 cr, 
liners up .005", steel head gasket,  and the motor had been running for about 1 
yr. thanks for any ideas. ken  m.
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