Oil Pump O-ring Mod - Testers NEEDED

[C. Ludwig]

Originally Posted by TitaniumTT

Thanks Ludwig. So just to clarify, the one that I have pictured is considered an S6+ pump correct? Does anyone have pictures of an S4/5 turbo pump?

Yes. The earlier pumps are entirely round without that flared out section.

Did TiTT, did you use a gasket for the front cover? With the S5+ you need to use a gasket of some sort or the white plastic ring with bulge out and press the rubber o-ring into the oil passage. The RX-8 gasket fits the earlier engines and is a metal gasket which seems to be a nice way to go.