2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

0psi, how does that happen?

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Old Dec 15, 2001 | 02:23 AM
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Mazda2ndgen's Avatar
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0psi, how does that happen?

is it possible to have 0psi on all three rotor faces? b/c on my rear rotor im getting absoultly nothing. just wondering what would cause that. is it possible to break all 3 apex seals in one run? if you were to run EXTREEMLY lean could you break all 3 apex seals? just wondering b/c i leaned out bad, and the car runs aweful and i have no compression on the rear rotor.

thanks for all the help
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Old Dec 15, 2001 | 02:42 AM
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Scott 89t2's Avatar
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I think you can. I don't know if it would go all the way to 0 though. you normaly atleast have some. are you sure the gauge is working? did you pull both plugs out to check it? that would do it too
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Old Dec 15, 2001 | 09:35 AM
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If one seal lets go and the next one gets taken out by the chunks, you could get almost no compression at all. Remember, if one seal goes, it will affect compression for two faces.

Cory
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Old Dec 15, 2001 | 10:02 AM
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Re: 0psi, how does that happen?

Originally posted by Mazda2ndgen
is it possible to have 0psi on all three rotor faces? b/c on my rear rotor im getting absoultly nothing. just wondering what would cause that. is it possible to break all 3 apex seals in one run? if you were to run EXTREEMLY lean could you break all 3 apex seals? just wondering b/c i leaned out bad, and the car runs aweful and i have no compression on the rear rotor.

thanks for all the help
Yes, this is very possible. Really you only need to loose two seals though to kill the compression on all 3 faces. My N/A suffered this death.... 0 compression on all 3.

Welcome to the blown motor club,
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