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When I rebuilt my engine I did not know if the block had the corrosion
problem which would cause oil in the water. Therefore after the block =
was
dipped to clean it, I took it to a company who vacuum impregnated the =
block
with resin (Twice).
=20
The process is degrease the block; insert into a chamber which is then
evacuated; allow resin into the chamber; return to atmospheric =
pressure,
then drain resin; insert block into tank of water at 95 degrees =
Centigrade
for twenty minutes. Resin cures at 60 degrees Centigrade or so.
=20
This is apparently standard practice for castings which might have =
porosity,
particularly aluminium ones, but they happily did my block.
=20
The cost was not great (=A340 cash about six years ago)
=20
Ian
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class=3DWordSection1><p class=3DMsoNormal>When I rebuilt my engine I did =
not know if the block had=A0 the corrosion problem which would cause oil =
in the water.=A0 Therefore after the block was dipped to clean it, I =
took it to a company who vacuum impregnated the block with resin =
(Twice).<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>The process is degrease the block;=A0 insert into a =
chamber which is then evacuated;=A0 allow resin into the chamber;=A0 =
return to atmospheric pressure, then drain resin;=A0 insert block into =
tank of water at 95 degrees Centigrade for twenty minutes.=A0 Resin =
cures at 60 degrees Centigrade or so.<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>This is =
apparently standard practice for castings which might have porosity, =
particularly aluminium ones, but they happily did my =
block.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>The cost was not great (=A340 cash about six years =
ago)<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Ian<o:p></o:p></p></div></body></html>
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