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Wear limits of S4 TII rotor Apex seal slots

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Old 06-26-09, 09:22 PM
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Wear limits of S4 TII rotor Apex seal slots

I have one that looks to be streched some in the apex seal slot area. It is more severe on only one side.

Side A gaps measured: 2.01-2.04 mm
Side b gaps measured: 2.15-2.18 mm

I believe this would be out of spec BUT I cant find any credible information.

Here are all six..





Old 06-26-09, 09:51 PM
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i have always done it by feel and never had a problem
Old 06-27-09, 12:13 AM
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Originally Posted by silverfdturbo6port
i have always done it by feel and never had a problem
You clearance your apex seals by *feel*? I don't mean to be rude, but that is no way to build an engine in my opinion, not when you're dealing with clearances that are measured in the thousandths of a millimeter.

murray, I wouldn't use those rotors in a build at my shop.
Old 06-27-09, 09:52 AM
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Originally Posted by GoodfellaFD3S
You clearance your apex seals by *feel*? I don't mean to be rude, but that is no way to build an engine in my opinion, not when you're dealing with clearances that are measured in the thousandths of a millimeter.

murray, I wouldn't use those rotors in a build at my shop.
AGREED. They would be a good canidate for 3mm SEALS. as long as there are no problems with the faces.
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