I will tell you this. there is a product called deepcreep that is like magic on stuck bolts/bearings/keyways and all sorts of other stuck situations. if I had to do this job, I would spray each plug while the motor is still warm and let it soak over night. I would then start with the easiest plug first and work from there. I would also buy the extraction tool in advance. good luck
this. But we used pb blaster. Get Moyer hot and spray each plug down good and let it soak. I haven't broke one but have seen it several times. Pay close attention. good luck.
