how do you tell if you have a cracked rotor?

 

There is a crack in it? Is your engine still together or seomthing?

 

Mmm...

Engine or brake rotor?

 

still together an runnin but when i started it it made a loud clunk sound twice an its smokin real bad not really white smoke but it steenks

 

(smells horrible)

 

compression test.

 

You didn't crack a rotor. It's pretty much impossible.

However, you may have blown an apex seal or 3.

Best thing to do right now would be a compression test.

 

yeah i figured that but i dont know i'm just gettin sick of messin with this thing

 

apex seals have been changed within 20,000 miles

 

i'm lookin at another car that has 50,000 miles on it an it dont run is it possible for the apex seals to be bad on it at that low of miles

 

Yes... and learn to use the edit feature.

 

ok
I'm sorry i'm just so stressed out this is my only car an no matter what i do i cant seem to get it back on the road

 

Just run a compression test. It will reveal all.

 

can anybody tell me what the compression is supposed to be on my car.

1987 RX7 non-turbo

also would the compression have anything to do with why it idles at 4000rpms

 

Just run the poor mans compression test for a quick check. Pull the EGI Ing and EGI Comp fuses from under the hood (located on the drivers side near the battery) then pull out one of your spark plugs. Have someone crank the car, you should hear three even 'wooshes'. Once this is done put your plug back in and take a plug out of the other rotor and crank the car again. If you hear one woosh, you have lost an apex seal, if you hear no wooshes you have lost two or more apex seals.

I dont think seals will break right after engine startup. Did you build this motor yourself?


edit: compression will not have anything to do with why it idles at 4k rpms. I dont recall off the top of my head why this would happen, just do a search in the 2nd gen forum on 'high idle'. Do a compression check first to make sure your motor isnt blown.

 

no this motor was in it when i bought it. but i noticed the air pump an assesories have been removed an i believe the EGR valve has also been removed.

Ok test complete 3 whoosh sounds in a row an it didnt miss a beat an they sounded strong