Ive read most of the threads about rasing a KA24DE's compression by throwing in a KA24E's pistons and that it fits right in. But can this create problems when the KA-E's pistons expands from the combustion heat? Will there be enough clearance between the cylinder walls and the pistons to prevent the engine from binding or sizing?

 

they are the same bore and stroke the only difference is the sohc piston is more of a flat top while the dohc is more dished out...

 

Could the KA-E piston be able to take the increased compresssion pressure in the DE engine?

 

yes