About two months I guess I broke my water seals but I never saw smoke come out of the exhaust but the dang car kept eating the coolant. Long story short I went to work and drove the car like 60 miles that day and the whole day the coolant light kept coming on then it was fine until my way home. I stopped by the barber shop and then when I went back I added some water and the car temp gauge took off and said it was over heating so I drove into a gas station and kept poring water on the rad so it can cool off. When the car cooled off I thought it was fine and drove normal so I took it home (1 mile) and left it there. The next day I bought a new thermo from mazda but the old one was all sticky and gooey (my fault, took to long), so I changed it but the car would not hold water.

When I shut the car off and cranked it back on it would grind somewhere in the motor? but I don't know what it is. When the car is cold it will crank on a few tries but once I restart it, it grinds again. Also I saw oil shooting out of my oil filter housing? so I think the coolant is going into the oil and not the combustion chamber.
I haven't had time to touch the car because I'm graduating college this week so I didn't want to start working on the car and not concentrate on my last quarter at school but I will have time on the weekends now.

I haven't taken the oil out yet so I will check on that, but do you think the grinding is an apex seal scratching my housing or a piece of metal somewhere else that broke? Why doesn't it smoke? Why do you think the oil is leaking out of the oil filter (pressure, bad filter)?
I know this is long but please give me comments (good or bad) 'cuse I should have just searched.

One more thing I can get a whole JDM front clip for $2,XXX or should I just get a reman, I thought this would be better is my turbos were damaged.

 

Well, depending on how badly you overheated it, you could have gone to the point of Warping your side housings. Mazda designed the motor with Aluminum side housings, and Cast iron Rotor housings and if you have a basic knowledge of physics/metals whatever, you understand that they can tolerate different heat ranges, and will cool down at different speeds which can lead to warping.

Also, I'd say 7/10 times overheating a motor will just eat your o-rings alive, so thats probably what your expieriencing.

I dont think warping them, unless to a huge extreme, would actually cause the rotors or eccentric shaft to warp out of spec to the point of grinding against a housing or anything. Recalling past threads on warped motors, I believe the warping causes Excessive vibration and shaking, and will continue to do so untill the motor is rebuil and the warped pieces are replaced.I'd also assume that the noise would be incredibly loud and would basically tear your motor up to the point where it would never run/start if the warping was extreme to the point of grinding noises. However my knowledge on warped motors is limited as it isnt very common. From your description im assuming your motor runs fine aside from eating coolant, so the warping thing is just a posibility.

What you might be hearing, which is typical with rotary's especially, is your starter being overspun. It happens the most when your motor is fully warmed up and you had just shut it off recently. The starter will begin spinning your motor, but the motor will catch almost instantly. You are still trying to start the motor so the starter will still be engaged on the flywheel. The motor will start to spin faster then the speed at which the starter spins, taking the starter to that speed; hence "overspinning the starter or whatever u wanna call it.

Most people are used to the noise the starter projects from its normal rpm, so when it overspins most people cant figure out what the noise is.

Anyway enough typing, hopefully some of this info will help. If not oh well =\

 

One thing I forgot to add was to get a pressure tester and pressurize the coolant system. That will tell you where your coolant is going.

 

thanks Rx-7$4$me for the info. The grinding is not very loud at all it is just strange though, doesn't sound like when you overspin a starter though it is soft but I have never done it to the 7 before so i'll say thats the noise. The thing is I changed the oil a week before and I was thinking if the oil filter was defective I can have them pay for it but it's a long shot of course.

One more thing is it normal for the coolant to all go into the oil? because it's not smoking at all but the coolant is disapearing. I'll mess with it this friday and tell you guys what I find.

 

Are you saying that there IS coolant in the oil or that you speculate its going there. 95/100 times your motors gonna be eating the coolant if you dont have a physical leak anywhere.

Plus, you said you already know your coolant seals are gone, so why havent you ripped your motor out and rebuilt it yet? That will answer all of your questions. Rotary's get blow by with gas in which it will dilute the oil when it seeps down into the oil pan. Coolant in your oil could be a result of it pouring into your motor from your damaged coolant seals, and then leaking down into your oil pan. I mean, your said your coolant seals when a while ago, the damage is only going to get progressively worse. Just pull your motor and rebuild it.

Oh, and, as stupid as it sounds, did you make sure to replace and lubricate the oil filter gasket?

 

yeah the filter gasket was lubbed and sealed correctly.
I haven't touched the car in like 2 months since it happened because of school.
I will start taking the motor out as soon as I can but thanks for your concerns though.