Honda Pacific Coast ipcrc Archives

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Coolant System Pressure Cap - Overlooked Preventive Replacement
Written by wynndungey on 6/21/2012 at 09:21 pm

I've never had one fail. And that locking screw was a surprise when I went to
change the fluid. (Seems like a strange thing to put on a motorcycle.)

--- In ipcrc@yahoogroups.com, "Alfred W" <alfred.wams@...> wrote:
>
> Curious as I am and just having repaired a microwave oven, I followed your
advise and checked on the price. It says 28 Euro's. Nice thing to have. The
comment is even more interesting:
>
> description:
> Vital component, which makes sure your coolant, does not pressurize with
devastating results from localized over heating! Cylinder head gaskets failing,
along with warped cylinder head is something best avoided, especially when all
you needed was a new cap!
>
> This means that the cap also has a pressure valve. When this is needed because
the fluid boils at its hottest point but does not function right the whole
engine is damaged and water will be pushed inside or the radiator will start to
leak.
>
> The fluid can boil without being under pressure and with a low boiling point
of the fluid inside but the system can also over-pressurize with boiling at one
spot somewhere when the pump fails for example and it is sealed the way it
should.
>
> Is it right to presume the pressure cap on the Pacific Coast has to be
replaced before it ever malfunctions? When? The manual only mentions inspection
every 8.000. Alfred
>
>
> --- In ipcrc@yahoogroups.com, "skyeenter" <skyeenter@> wrote:
> >
> > The talk of coolant system change struck a note. You never know when or
where you are going to get coolant boil over due to a weary, worn out pressure
cap.
> >
> > I experienced this on my aborted 48 - 10 ride. Fortunately it happened in
Troy NY. Stopped for a bottle of wine. Heard the gurgling and knew what it
was. Just needed to find a cap.
> >
> > Honda dealer three blocks up the road just closed. Found an Advanced Auto
on Hoosick St/Ave? two blocks away and Kevin the manager went out of his way to
get me a cap that fit.
> >
> > Had to saw part of the cap wing off to clear the meter panel. But it fit.
He donated a quart of 50/50 mix to get me on my way.
> >
> > My recommendation, if you're not sure of the age of your cap or when it was
changed go find one right now. Don't leave yourself stranded helpless in
nowhere land and watch all your coolant boil off.
> >
> > skye
> >
>