Coolant hoses

[gregory O]

LeroyE has a post here some place on how he tested his warning shutdown device
89?pt. its easy to test. shouldn't be difficult to figure a way to drain the
tank to that point. I guess a better way is to use the radiator tank drain valve
so the leak is proven to quickly show up in the E tank. my fear with using r
tank drains are making them close off when finished . my sensor is below the
glass also so I must have also removed a line.

on the 94 there is a extra vent 3/8 hose between radiator tank and expansion
tank that I can only figure vents air from atop of the radiator or additional
equalizes the two tanks?????? I wonder if this is a model year add-on or is it
part of prior year coolant system?

like the looming danger in the prior air leak post, 'poking around' looking to
fix a PO added Wabasto on Marks pt'88 was the pre trip mechanism that damaged
the past life hose. once there is pressure in the hose a crack that appeared but
didnt cause visible leak, we can only figure let loose.

radiator cap replacement and radiator rodding are also overlooked maintenance
procedures.


--- In WanderlodgeForum@yahoogroups.com, "Don Bradner" wrote:
>
> The point with the brittle hoses is that they break from impact on the
OUTSIDE, not expansion causing bursting. Kick up a rock, for example.
>
> My sensor is way below my sight glass - would have to go down a gallon or more
to reach it from that point.
>
> On 10/25/2009 at 8:31 PM gregory O wrote:
>
> >yes my coolant low sensor works. I tested it by draining the tank thew
> >the sight glass while running.
> >
> > MarkD 88pt blew a coolant hose and the ddec shut him down. Age of hose
> >and condition was the cause of the burst so the repair was limited to a
> >tow and $700. 'hose job'.
> >
> >
> >
> > when an engine spins a bearing the heat is quick. expansion not relieved
> >by the r cap builds to burst a hose. the weakest link hose bursting is
> >then a result, not cause.
> >
> >When someone gets shot, sometimes they bleed to death. what then would be
> >the cause of death?
> >
> >Greg
> >94ptca
> >
> >--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
> >wrote:
> >>
> >> Too many anecdotal examples of engine damage from explosive coolant loss
> >to accept that. Whether it is due to the coolant-low sensor not working (I
> >don't know if mine works, do you?) or just not responding fast enough is
> >impossible to say. The compressor hoses have been implicated in more than
> >a few.
> >>
> >> I considered the hoses a critical preventive maintenance item, and had
> >mine replaced last year. The old ones were like glass - shatter on impact,
> >snap on bend. I may lose my engine to something else, but it won't be that
> >one!
> >>
> >> Don Bradner
> >> 90 PT40 "Blue Thunder"
> >> My location: http://www.bbirdmaps.com/user2.cfm?user=1
> >>
> >> On 10/25/2009 at 3:51 PM gregory O wrote:
> >>
> >> >if he blew a hose and it lost coolant the bus would have shut down when
> >> >the expansion tank lost its fill and sent the detroit computer in to
> >> >crawl-low-r-mode. more to it than just a blown coolant hose.
> >>
> >
> >
> >
> >
> >------------------------------------
> >
> >Yahoo! Groups Links
> >
> >
> >
>