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Rotor Housing cracks

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Old 10-23-03, 06:57 AM
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Unhappy Rotor Housing cracks
I've done some looking and cant find an answer to this. I have 2 used rotor housings. They both have 2 small cracks in the same place. One on each side of the leading plug hole on the trochiod surface. They are located at 90* and 270* and approx 1/8" long. Now Ive read at Mazdatrix that this type of cracking at the trailing plug holes is bad juju, same thing for the leading?
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Old 10-23-03, 10:41 PM
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You're talking 13B-REW housings?


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Old 10-24-03, 09:40 AM
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Sorry, I should know better. 12A N/A
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Old 10-24-03, 07:59 PM
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I've seen them regularly on 13B-REW motors, but on almost any other engine, it's most likely detonation problems.


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Old 10-24-03, 08:24 PM
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its usally from detonation
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