hey guys I need some help! I have been rebuilding this engine for a year now and last July (2023) I fired it up for a compression test. When all of a sudden a loud bang happened. Killed the engine and we had good compression.

So a few weeks later I put new oil and coolant in it. When I checked the oil I noticed coolant and oil were mixed. So now I have taken it apart again and this massive scrap is on the front iron. I’m not sure if it was due to a side seal or “E” or counter weights or even I may have mixed up the roters.

Any advice would be amazing. In the mean time I may put another engine in it so any suggestions would be greatly appreciated

 

Oh yikes. From the images that iron looks toast.

Did you take a look at the o ring gaskets and that metal oring gasket housing?

 

I vote send it to a shop. Respectfully, if you do not know the issue it may happen again. It would cost you a lot more to do an entire engine, tranny and all the stuff you forget….

If that’s the only damage I would let some else take a stab at it.

 

the oil ring were fine and brand new from Mazda themselves. We are getting another kit.

 

That is fair. Just shop fees haha. There aren’t many shops here in Alberta Canada that fixed rotary engines. I believe the closet is 4 hours away. (I could be wrong)