Wanderlodge Gurus - The Member Funded Wanderlodge Forum

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.

Does he need a rebuild?

One more test would be to run the bus then screw off the expansion tank sight
window and see if draining coolant prompts a shut down????? this would shut
him down wit a blown hose assuming the expansion tank also loowes coolant as a
result............

a good test to prove that the expansion tank shut down sender proves a shut down
when the coolant hose pops is to run the bus then pop the hose and see what
happens.

BUT........if the t stats are not open, it may be that the expansion tank may
retain fluid. and without hot fluid, the t stats wont open????? in that
instance the expansion tank shut down prompt should then be duplicated to a
block location. where the water should be to cool?????????????

one problem with temp gauges on coolant is they do not measure air temp. if the
coolant is lost, you may not see the temp rise. this is where the oil temp I
guess is your second chance to see the condition. noise is usually a good second
chance indication of a problem but lost chance in a pusher. I am sure someone
will come up with a digital reader to define the sounds reference index then
factor that to ;speed, ;demand, ;rpm ;etc... then take that value and compare it
to good running like noise at the same factor conditions.

I bet sound is one of the first prompt of issues with most mechanical devices. I
even use communication sound changes to avoid breakdowns expensive overhauls in
social issues with Tim.

Greg
94ptca


--- In WanderlodgeForum@yahoogroups.com, Ernie Ekberg wrote:
>
> I was asked by Rob Robinson to post this about our coolant hoses for the
compressor on the PTs
>
>
> Ernie Ekberg
> 83PT40
> Wanderlodge
> Weatherford, Tx 817-475-3991
> http://autos.groups.yahoo.com/group/erni...gandrepair
>
> --- On Sat, 10/24/09, Rob Robinson wrote:
>
>
> From: Rob Robinson
> Subject: Request
> To: "Ernie Ekberg"
> Date: Saturday, October 24, 2009, 9:18 PM
>
>
> Ernie would you please consider posting the quote below on your forum and the
ladies, especially the ladies. This crap should not be happening. We know
better. I realize we can't help the Rahn's now but if they had been on your or
our forum we might have been able to. I know there are still a lot of people out
there that need a wake up call. Birds may be owned but they are a finite entity
and as such each owner has a responsibility for reasonable care of a scare
resource. ThanksÂ
>
>
> Quote"For a couple of years now various Wanderlodge forums have preached and
preached for the replacement of the two 8V92 compressor hoses. All you 8V92
owners need to change these hoses. Not just the early models. Every owner of
this engine needs to either replace these hoses or insure that it has been done
previously. 1994/95 was the last year they were installed. That’s old enough.
I can't believe this problem is still occurring and I'm asking all Bluebird
forums to repeat this thread. There is no reason what-so-ever for an engine
failure due to failed compressor hoses. Tomorrow an investigation will begin to
determine if there is any concern regarding the 6V92 compressor coolant hoses.
All forums will be kept in the loop."UNQUOTE
>
>
> Rob Robinson
> 94 WLÂ
>
> --
> Rob, Sue and Joey Robinson
> 94 WLWB
>

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.

I had the radiator off my 77FC35 earlier this year to replace a failed belt.  

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.
>

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
>
>
>

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
> >
> >
> >
>

I can confirm the same potential exist on 6V92s. One of my hoses broke during a
10 mile run. Parked the coach and saw the coolantm leaking.
Very little had leaked at that point and was able to replace hoses
w/no damage to engine. I really dodged a bullet.

Art Weatherly
Riverside Ca.
'85 PT36

--- In WanderlodgeForum@yahoogroups.com, Ernie Ekberg wrote:
>
> I was asked by Rob Robinson to post this about our coolant hoses for the
compressor on the PTs
>
>
> Ernie Ekberg
> 83PT40
> Wanderlodge
> Weatherford, Tx  817-475-3991
> http://autos.groups.yahoo.com/group/erni...gandrepair
>
> --- On Sat, 10/24/09, Rob Robinson wrote:
>

Art I believe you are the third person in the last two days that I have heard confirm this issue is 6V92 as well as 8V92. Information based on personal experience is exactly what we're looking for. Thank you



--
Rob, Sue and Joey Robinson
94 WLWB