I pull my motor a month ago, clean the rotor housings and everything was cool besides the rear rotor housing.

Then now, I started to clean the rotor and this is what they look like =[

Front

Rear



It is my first rebuild and i want to do it so I can learn about this motor and save some money for a paint job. A friend, who rebuilted his motor before is helping me.

Comments and suggestion would be really appreciated.

 

rotors look way out of tolerance, time to replace them along with your housings.

 

why chance it

 

Chance it?

 

i believe what he is saying is why take a chance putting that in and maybe causing problems later down the line. i know you want to save money, i know you wanted to get feedback by others just in case its salvageable. That is why he asked.

 

no good..... theres a good bit of nicks in the apex seal groove. i wouldnt risk a more costly rebuild in the future re-using those rotors

 

Thanks, i agree, i do not want to reuse it if i cant, and if i cant reuse it i wud not salvage it to a member. Thank u everyone, its gonna be an expensive rebuild and long time saving for paint.

 

you might be able to 3mm the rotors and re-use them. You'd have to manually check the tolerances with a micromiter though. The gash is bad..but really.. it's worse to have bad apex seal grooves..
But honestly.. the money your going to spend to have these repaired... and new seals.. you might as well look for a good set of weight matched used rotors..

 

i wish i could save for a paint job, been trying to do my suspension first... but it seems like something always comes up that takes the money instead.

 

Although many "reputable builders and shops" on these forums state that they won't be re-useable I would have to disagree respectfully. The apex seal gash on the face is superficial IMO. The real area that you need to look at is the flake at the tip of that apex seal land. If you could measure how far from the rotor face it came off I could tell you if we could race clearance the faces and the "tips" of the rotor.

Trust me 9 out of 10 people will call these rotors shot but they seriously need to stop the close-minded visual evaluation method. True talented engine builders know that damage to certain areas of rotor housings and engine rotors will have no noticeable effect on engine performance. Heck, most engine builders don't even know of the flipping rotor technique that I've used for building MANY engines. I won't even discuss "my" concepts anymore so there's no argument engaging. You'll either trust me or keep shelling out unnecessary money like others do for their builds...

Contact me if you want me to elaborate with specific details.

 

^ I trust lance...

And sorry to thread jack...but
P.s. Lance... Thanks so much for the rotating assembly... Mr coleman is building my motor and sent me a spec sheet.. My rotors are DEAD even in weight! Thanks much for the deal!

 

Perform the inspection procedures in the service manual.

 

You know my style Manny! Good to hear things are moving forward for you. Let me know if you need ANYTHING else.

 

Are those FD rotors? I notice they have a verysmooth finish on the faces except the bathtub area. When I opened up my engine (from japan) the two rotors appeared different......one had the lines like in the tub area on the whole face. The other one looked like yours. Its apparent that the engine was rebuilt in japan, but I am unsure which design is the true FD one.

Can anyone clarify this?

 

they both are FD rotors. if you buy NEW FD rotors, and take them out of the mazda packaging, some will be smooth some will be grooved.

it basically means that they should have changed the bit in the machine tool sooner....