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Old 03-09-2016, 04:25 PM   #21
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Never trust that a brand new throw out bearing is assembled properly and ready to use right out of the box.

That is all.
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Old 04-27-2016, 06:56 PM   #22
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Never trust that a brand new throw out bearing is assembled properly and ready to use right out of the box.

That is all.
I'd be interested in hearing more about this. I had a very similar issue with my motor and got about 800 miles out of it before it was toasted. Ultimately I tracked it down to the rear thrust bearing being eaten and other issues resulting from that failure.

I'm now assembling a new motor with correct end play while its out of the car but definitely would like to avoid repeating the experience.
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Old 04-27-2016, 07:21 PM   #23
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Was it a part from Mazda Comp or from some other source?
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Old 04-28-2016, 11:33 AM   #24
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Was it a part from Mazda Comp or from some other source?
My last one came from Flyin Miata, though I can't recall the brand. New motor is using ACL thrusts ordered from 949.
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Old 04-29-2016, 11:34 AM   #25
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Was it a part from Mazda Comp or from some other source?
first thrust bearing was a king

second thrust bearing was an ACL

throwout bearing is whatever 949 sends with their twin race clutch.
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Old 04-29-2016, 11:40 AM   #26
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Originally Posted by Elfering View Post
I'd be interested in hearing more about this. I had a very similar issue with my motor and got about 800 miles out of it before it was toasted. Ultimately I tracked it down to the rear thrust bearing being eaten and other issues resulting from that failure.

I'm now assembling a new motor with correct end play while its out of the car but definitely would like to avoid repeating the experience.
this was immediate failure. Moving the car in and out of the garage. I suppose with really loud exhaust and/or the radio cranked loud enough to not hear the unnatural engine noises, it might have gone 800 miles.

but basically the throw out bearing is a multiple piece assembly that was not assembled correctly and was just acting like a big fat solid spacer.
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Old 04-29-2016, 01:30 PM   #27
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Please excuse my lack of comprehension; what you are saying is that the throw-out bearing was pushing constantly on the clutch springs, causing the clutch springs to push the crank shaft against the thrust bearing full time?

Same condition as pushing in the clutch to start the motor, but not releasing completely when the clutch pedal was released? Or, saying it a different way, sitting with the clutch pedal depressed while the engine is running?

Seems like there is more to your problem than a bad throw-out bearing. Check further before you have an instant replay, please.

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