Radiator Cap on 89 SP 36'

[dspithaler@...]

The other day I had the fill cap neck of the coolant fill tube fixed. It had
a bad spot in the lower ring that would let the coolant buy to the over
flow. It had been brazed before & it looked like it had been done at the
factory
as it didn't look like it had been taken out before. I took it to a rad shop
& had a new neck put in. It cost a whole five dollars to have done but then I
have given this shop two rad jobs in the last couple years. My question is
the old cap had a rubber seal on the bottom & a brass on top and the new one I
bought form NAPA had a rubber seal on the top & bottom. They are both 7# so
they are the same pressure. What is the differences between them? The new one
looks like it would not let any coolant out of the top& it fits a lot
tighter. The generator hat the same 7# cap on it with rubber only on the bottom
so
I don't think they had been changed. Which is the best cap?
Don
89 SP 36'
Butler, PA


[Non-text portions of this message have been removed]

[Stephen Birtles]

iwould say that the old one is an open system cap any leakage or
expansion goes to atmosphere or overflow the new cap would allow
expansion only outof the overflow(closed system cap) siutable for use
with expansion bottle
Stephen 77fc35




--- In WanderlodgeForum@yahoogroups.com, dspithaler@a... wrote:
> The other day I had the fill cap neck of the coolant fill tube
fixed. It had
> a bad spot in the lower ring that would let the coolant buy to the
over
> flow. It had been brazed before & it looked like it had been done at
the factory
> as it didn't look like it had been taken out before. I took it to a
rad shop
> & had a new neck put in. It cost a whole five dollars to have done
but then I
> have given this shop two rad jobs in the last couple years. My
question is
> the old cap had a rubber seal on the bottom & a brass on top and
the new one I
> bought form NAPA had a rubber seal on the top & bottom. They are
both 7# so
> they are the same pressure. What is the differences between them?
The new one
> looks like it would not let any coolant out of the top& it fits a lot
> tighter. The generator hat the same 7# cap on it with rubber only
on the bottom so
> I don't think they had been changed. Which is the best cap?
> Don
> 89 SP 36'
> Butler, PA
>
>
> [Non-text portions of this message have been removed]