RTV on Cylinder Liner O-Rings, or Not...?

[Dio Genio <diogenio@xxxxxxxxx>]

I am about to rebuild a 2L engine from the bottom up.
Will install new Motronic 10:1 pistons and liners. 
Those paper thin liner O-rings that keep water and oil
separate are not very confidence-inspiring.

Some expert sources have advised me to add a small
fillet of Permatex special high-temp RTV over the ring
and then seat the liner.  Other people say to not add
anything at all to the o-ring. I'm unsure as to which
method is better.

I like the idea of RTV assisting where the o-ring
might not seat entirely, but once the RTV cures, any
slight movement of the liner would certainly cause
this additional seal to be corrupted. Since the only
thing holding the liners in place is the head, I can
imagine that inserting pistons in the liners and
connecting them to the crank would cause the RTV seal
to lift out of its "seat."  Is there some method to
ensure that the liners stay put once seated with RTV
(even while installing the pistons and rods)? 

Any further thoughts out there on this o-ring issue?
The last thing I want in my newly rebuilt engine is
water in the sump...

Dennis 
San Diego  
   

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