Side Seal Clearance - Gimme Recommendations
#1
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Side Seal Clearance - Gimme Recommendations
I am rebuiilding an engine.
Mazda spec is 0.002"-0.006" with maximum allowable of 0.016"
Mine are all measuring about 0.009"
What will be the affect on compression and does anyone know what a set of new seals can be purchased for?
Mazda spec is 0.002"-0.006" with maximum allowable of 0.016"
Mine are all measuring about 0.009"
What will be the affect on compression and does anyone know what a set of new seals can be purchased for?
#4
Original Gangster/Rotary!
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I don't recommend cutting corners on engine internals. Having said that, you're still within the max allowable.
Many years ago, an unnamed shop rebuilt my motor and I'm positive they reused my side seals. I always had problems with excessive fuel dilution in my oil, and my oil was always very thin, even right after an oil change. It always reeked of gasoline.
When I tore down that motor after some fun detonation chewed up some shitty hurley apex seals, I found that the side seals were quite loose. I never measured the spec, but I am sure they were way out. Anyway, some info to help you make the best decision.
Many years ago, an unnamed shop rebuilt my motor and I'm positive they reused my side seals. I always had problems with excessive fuel dilution in my oil, and my oil was always very thin, even right after an oil change. It always reeked of gasoline.
When I tore down that motor after some fun detonation chewed up some shitty hurley apex seals, I found that the side seals were quite loose. I never measured the spec, but I am sure they were way out. Anyway, some info to help you make the best decision.
#5
Racing Rotary Since 1983
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side seals are one of the KEYS to an outstanding build versus an average build.
set clearance at .002". the seals come long and you have to file them to spec. not only do they need to be .002 but the face has to be absolutely perpendicular and it has to be angled so as to match the face of the corner seal.
do a search here and on nopistons for additional info.
you need to spend lots of quality time clearancing side seals.
howard coleman
set clearance at .002". the seals come long and you have to file them to spec. not only do they need to be .002 but the face has to be absolutely perpendicular and it has to be angled so as to match the face of the corner seal.
do a search here and on nopistons for additional info.
you need to spend lots of quality time clearancing side seals.
howard coleman
#7
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Originally Posted by tsmysak1
Mazda spec is 0.002"-0.006" with maximum allowable of 0.016"
Mine are all measuring about 0.009"
Last edited by t-von; 06-12-06 at 11:19 PM.
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#10
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Originally Posted by BobfisH
Errr, im pretty sure i clearanced mine to within 0.04 when i rebuilt my engine? And ive got 120psi on both rotors with no starting problems....
If it is .04mm you shouldn't have a problem. The .002 everyone is speaking of is in inches.
#12
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Originally Posted by howard coleman
you need to spend lots of quality time clearancing side seals.
howard coleman
#13
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Originally Posted by tsmysak1
Dang!
$150 for 12 seals is steep.
Does anyone have experience in this sort of thing? There has to be some that have used seals like this.
$150 for 12 seals is steep.
Does anyone have experience in this sort of thing? There has to be some that have used seals like this.
Why is it that piston people normally do not think of reusing seals for an engine rebuild? Cost should never be a factor for a good rebuild.
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