mazda will only ship the most recent part number (which supercedes all
others) as they discontinue stocking all others.  As mazda has been working
12 years to fix this problem i would advise you use their most recent
attempt at a solution rather than try to go it your self.

The difference in response you noted comes from the fact that, before
breaking, the cam timing was likely off substantially — so you were not
driving a ‘healthy’ B6 variant engine.

Good luck with the rest of the repair.

Regards,

Brian.

- Hide quoted text — Show quoted text -

In article <19970704145601.KAA29…@ladder02.news.aol.com> noaz…@aol.com (NoaZark) writes:
>From: noaz…@aol.com (NoaZark)
>Subject: Crankshaft failure update!
>Date: 4 Jul 1997 14:56:29 GMT
>First of all…Happy Fourth of July…as of yesterday…my ’90A is still
>in the air at the dealership (literally)…the new crankshaft has been
>installed…there was a bit of a wait for the correct main bearings to
>arrive…i heard the car run yesterday for the first time since the c.s.
>has been replaced…what an incredible difference in terms of throttle
>response at idle!!!…this is good!…i saw the old c.s. the key appeared
>to have been inserted incorrectly as was suspected…it just was not
>sitting correctly…so the c.s. has been replaced, the timing belt drive
>gear, the front seal, the main bearings, the harmonic balancer/pulley.
>However…there is an uncertaintay as to whether or not the c.s. bolt that
>came with the new c.s. is the since improved "hardened" bolt. Perhaps
>someone out there knows this information…here is a list of the
>generation of Mazda part numbers as they relate to the crankshaft and
>bolt.
>I was told that the original c.s. part number was:
>B61611300A
>which was altered (improved) and changed to the following number:
>B61611300B
>It is my understanding that the most current version of this improved
>crankshaft is as follows:
>B61711300  (no alpha character).
>In relation to the crankshaft bolt…there have been three successions of
>this bolt too…in the series listed, from first to most current:
>B63011406A
>B63011406B
>B63011406C (most current)
>The part number for the c.s. key…is as follows, with two apparent
>changes:
>B63011317
>B63011317A (most current)
>Does anyone have information which would contradict the above…i’d sure
>love to know…thanks..
>At this moment, the dealership and I are attempting to answer the
>crankshaft bolt question before committing any particular bolt, coated in
>thread-lock, to the crankshaft. But I half expect that by Wednesday of
>next week…i will have the car back…
>Take care all..!!
>Noah

——————————————————————————
Bryan

Anyone else reading this who needs a bottom end (or top, for that matter) I
have 1 brand new and 1 used B6turbo motor available either complete or will
separate into major components.  Give your Miata a real kick in the pants!

Bryan
(519) 885-0341

y

- Hide quoted text — Show quoted text -

In article <19970704145601.KAA29…@ladder02.news.aol.com> noaz…@aol.com (NoaZark) writes:
>From: noaz…@aol.com (NoaZark)
>Subject: Crankshaft failure update!
>Date: 4 Jul 1997 14:56:29 GMT
>First of all…Happy Fourth of July…as of yesterday…my ’90A is still
>in the air at the dealership (literally)…the new crankshaft has been
>installed…there was a bit of a wait for the correct main bearings to
>arrive…i heard the car run yesterday for the first time since the c.s.
>has been replaced…what an incredible difference in terms of throttle
>response at idle!!!…this is good!…i saw the old c.s. the key appeared
>to have been inserted incorrectly as was suspected…it just was not
>sitting correctly…so the c.s. has been replaced, the timing belt drive
>gear, the front seal, the main bearings, the harmonic balancer/pulley.
>However…there is an uncertaintay as to whether or not the c.s. bolt that
>came with the new c.s. is the since improved "hardened" bolt. Perhaps
>someone out there knows this information…here is a list of the
>generation of Mazda part numbers as they relate to the crankshaft and
>bolt.
>I was told that the original c.s. part number was:
>B61611300A
>which was altered (improved) and changed to the following number:
>B61611300B
>It is my understanding that the most current version of this improved
>crankshaft is as follows:
>B61711300  (no alpha character).
>In relation to the crankshaft bolt…there have been three successions of
>this bolt too…in the series listed, from first to most current:
>B63011406A
>B63011406B
>B63011406C (most current)
>The part number for the c.s. key…is as follows, with two apparent
>changes:
>B63011317
>B63011317A (most current)
>Does anyone have information which would contradict the above…i’d sure
>love to know…thanks..
>At this moment, the dealership and I are attempting to answer the
>crankshaft bolt question before committing any particular bolt, coated in
>thread-lock, to the crankshaft. But I half expect that by Wednesday of
>next week…i will have the car back…
>Take care all..!!
>Noah

——————————————————————————
Bryan