I also had two small leaks
from around the screw heads that didn't show up until after I ran the
engine.  I counter-sunk the holes and used small o-rings and button-head
screws on the two that were leaking.  No leaks since.

Mark S.


Paul,

I tried applying the 422 CC material per instructions and still have the
leak.

I will pull the side plates and try it from the inside.  I did the other
housing that way but have yet to test it.  if I can't get a seal I am
tempted to JB weld the cavity.

Joe Berki
Limo EZ

Doing it from the inside was what I had in mind.

Before you do that try Mark's technique.
Use a counter sink on the out side of the bolt
holes and a small O ring. Max CS diameter .352 inch.
Practice on scrap and use a stop.

I'll ask Jeff to machine them all that way.

You can buy the screws from McMaster with the right size O-ring.

Paul Lamar

Paul,

I also put Ultra Grey on the threads.  Once the coolant makes its way up the
threads, its a very short path from the hole to the outer edge of the
sealing plate.

http://www.permatex.com/products/Automotive/automotive_gasketing
/gasket_makers/auto_Permatex_Ultra_Grey_Rigid_High-Torque_RTV_Silicone_Gasket_Maker.htm


Mark S.