I just got a Pacer moped for a fix up project and the engine is seized at the piston and cylinder. I have been spraying PB blaster penatrating catalyst into the intake and exhaust ports and it sinks in very slowly, but still it won't budge. There are no signs of oxidation or anything unusual. Is it even possible to un-seize an engine? Maybe stick it in a freezer so the parts shrink down in size a little bit? Pleeease help me..