sodium silicate block/head/headgasket sealer, does it work? risks vs benefits? (long) (second SOS)

[Unka Bart]

>From: Mike Posner <posne at cts.com>
>Subject: sodium silicate block/head/headgasket sealer, does it work?
>risks vs benefits? (long) (second  SOS)
>
>My 82 coupe which just got a new head gasket , along with an expensive
>head rebuild  just  relapsed back into its  blowing the  overflow pressure
>valve before the hot water (superheated) in the head had a chance to fully
>circulate through the radiator.  I'm not seeing any H20 residue on the plugs,
>compression is 150 tto 165 on all five, I  am seeing the same symptoms I had
>prior to pulling the head.

>I suspect the head is warped this time  as  it
>over heated
>badly  while my son was driving it home from work.  It didn't seize and
>starts and
>idles well, no smoking and  no H2o in oil nor signifigant moisture coming
>out the
>exhaust.

Hi Mike,

Why do you suspect that the head is warped, given the absence of symptoms?
I hope it's not, my own head is pretty badly warped and there doesn't seem
to be a cheap fix.

Well, not with the price of drugs these days, anyway...

But I digress.

Have you considered that the problem is not in the motor at all, but in the
cooling system?

Yer kindly ol' Unka Bart