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Rotary Inspired · 10-07-2009, 10:54 AM

The engine consists of 3 irons or side plates and 2 rotor housings. They are sealed together with a total of 8 O-rings and held together with 18 long dowels. On the FC and FD Mazda moved the grooves for the O-rings into the irons or side plates. Unfortunately this was not as good of a design as the previous grooves in the rotor housings. Over time the cast iron plates can rust on the outer side of the groves from the coolant passages. Once it weakens it often breaks. I have fixed one by having it welded w/ a nickel rod and then resurfaced flat. It was a major PITA and I only did it because it was a RE plate. Good luck and keep us posted

10-07-2009, 10:54 AM	#11
Rotary Inspired Rotary Fan in Training Join Date: Feb 2008 Location: SW OKC Posts: 75 Rep Power: 18	The engine consists of 3 irons or side plates and 2 rotor housings. They are sealed together with a total of 8 O-rings and held together with 18 long dowels. On the FC and FD Mazda moved the grooves for the O-rings into the irons or side plates. Unfortunately this was not as good of a design as the previous grooves in the rotor housings. Over time the cast iron plates can rust on the outer side of the groves from the coolant passages. Once it weakens it often breaks. I have fixed one by having it welded w/ a nickel rod and then resurfaced flat. It was a major PITA and I only did it because it was a RE plate. Good luck and keep us posted __________________ If you wanna become ASE certified buy the RX7.