Ken Powell wrote:

Can we use 2-piece apex seals with used rotor housings?  All the
used rotor housings that I have seen (admittedly, only off of 4
engines) have a groove around the outside edge where the small
triangular piece of the 3-piece seals has caused the chrome of
the rotor housing to flake off.  I understand that this is pretty
common.  Will this groove allow too much blowby if used with a
2-piece seal?

Ken Powell

Hi Ken,

Ed Anderson wrote:

    I am putting the 2 piece apex seals in my rebuild of a 91 Turbo II.
These are not the race seals which I understand are too soft for long term
durability.  One of the reasons I am replacing the stock 3 piece seals is
for the very reason you mentioned, the small corner of the triangular shaped
piece of apex seal apparently puts a lot of pressure against the housing
leaving either a burnished mark or actually carves a grove.  The triangular
piece of the two piece apex seal is much wider where it presses against the
housing.  Reports are that the two piece seals better, is easier on housings
and work better with used housings.  I'll have no personal experience as
yet, but hope to soon.

Ed Anderson

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