Over heating 6V92

[Jay Darst]

Gang,

My Bird just experienced an over heat situation.

The temp gage read about 220 degrees, cooling fan on, winter/summer
switch in the winter position, all this would not bring the temp
down.The antifreeze was full.

Happened while Bird was idling. I assume the thermostats need
replaced. That will be by first repair,I suppose?

In the last 3 weeks been on a 2,000 mile round trip and a 400 mile
round trip. No problems.

Any suggestions or comments are appreciated.

Thanks
Jay Darst
85PT40 6V92 MTB654CR
Springfield, IL

[Rob Robinson]

Jay last week or so I took the louver cover off and cleaned the radiator
with Gunk and lots of water. Used garden hose vice pressure washer. It
wasn't that dirty but some folks told me that it doesn't take much dust and
grime to affect temps. I hope a good cleaning is all you need.

On 01/07/06, Jay Darst wrote:
>
> Gang,
>
> My Bird just experienced an over heat situation.
>
> The temp gage read about 220 degrees, cooling fan on, winter/summer
> switch in the winter position, all this would not bring the temp
> down.The antifreeze was full.
>
> Happened while Bird was idling. I assume the thermostats need
> replaced. That will be by first repair,I suppose?
>
> In the last 3 weeks been on a 2,000 mile round trip and a 400 mile
> round trip. No problems.
>
> Any suggestions or comments are appreciated.
>
> Thanks
> Jay Darst
> 85PT40 6V92 MTB654CR
> Springfield, IL
>
>
>



--
Rob, Sue & Merlin Robinson
94 WLWB


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

[Jay Darst]

Thanks Rob.

I cleaned the radiator before leaving for NY. Really wasn't dirty on
my either.

I have made sure that the coolant is as full as possible. Started
and ran engine. Coolant does not get up to operating temp, according
to the dash gage. The temp is around 160, which is where it stays +/-
5 degrees.

Went for a ride, temp never made it to 190 where it used to only
deviate 5 degrees.

The coolong fan did kick on a few times, but according to the gage,
it should not have.

Too hot, too cold, poor circulation. Pump? Thermostat?

Jay Darst
85PT40 6V92DD MTB654CR
Springhfield, IL


--- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
wrote:
>
> Jay last week or so I took the louver cover off and cleaned the
radiator
> with Gunk and lots of water. Used garden hose vice pressure
washer. It
> wasn't that dirty but some folks told me that it doesn't take much
dust and
> grime to affect temps. I hope a good cleaning is all you need.
>
> On 01/07/06, Jay Darst wrote:
> >
> > Gang,
> >
> > My Bird just experienced an over heat situation.
> >
> > The temp gage read about 220 degrees, cooling fan on,
winter/summer
> > switch in the winter position, all this would not bring the temp
> > down.The antifreeze was full.
> >
> > Happened while Bird was idling. I assume the thermostats need
> > replaced. That will be by first repair,I suppose?
> >
> > In the last 3 weeks been on a 2,000 mile round trip and a 400
mile
> > round trip. No problems.
> >
> > Any suggestions or comments are appreciated.
> >
> > Thanks
> > Jay Darst
> > 85PT40 6V92 MTB654CR
> > Springfield, IL
> >
> >
> >
>
>
>
> --
> Rob, Sue & Merlin Robinson
> 94 WLWB
>
>
> [Non-text portions of this message have been removed]
>

[Pete Masterson]

On my trip home from picking up my 'bird (with DD Series 60 engine),
I ran into heating problems while climbing grades in eastern Nevada
with ambient temps running in the high 80s and low 90s. I had to pull
off several times to let the engine cool at idle. (At least it didn't
overheat while idling!)

A couple of days earlier, while driving on I-70 toward Denver (across
Kansas), the engine ran warm, but not dangerously hot. That is, it
was hot enough that I was watching the gauges carefully, but still at
the top of the "normal" range as described in the owner's manual.

Note: I sure wish that BB had marked the gauges with some indication
of the normal range or the danger zone...

However, when crossing the Sierras ... I purposely stayed in Reno so
I could do "the hill" in the cooler, morning hours (a climb of about
3600 feet in a relatively few miles). Despite the considerable
grades, the temp stayed in the 180-190 range.

When I arrived home, I inspected the radiator -- and there was no
sign of dirt/dust build up. (I'm also guessing that the Series 60
doesn't throw oil around like the 6VXX and 8VXX engines.)

We then took a one-night trip to the Redwoods (up Hwy 101) which had
some relatively short, moderate grades with ambient temperatures
running in the 70s ... no sign of heating problems on that trip. (Had
a flat tire due to a bad valve core -- discovered it practically in
front of a Les Schwab dealer ... but that's another story.)

I've located a nearby radiator shop that works with heavy equipment
and I'll have them troubleshoot the system before my next outing. --
I'm concerned about the overheating problem as I'll soon have to do
the Sierras from the west to east, and there are 40 miles of grade
going from about 25 ft above sea level in Sacramento to 7,089 feet at
Donner Summit before dropping to 4413 ft at Reno. Due to the miles, I
can't get to the base of the Sierras much before noon ... so the
grade has to be handled as the air temperatures head for the
afternoon highs.

Since the radiator is clean and there's no obvious problems (belts
good, no signs of leaking from the cooling system) I can only guess
that there may be a faulty thermostat or that the water pump is not
as effective as is should be.

Turning on the fan override did help ... and I used it on my night in
the redwoods "just in case" so I'm also wondering if the thermostat
that turns on the fan may be faulty....

Any thoughts?


On Jul 1, 2006, at 12:40 PM, Jay Darst wrote:

> Thanks Rob.
>
> I cleaned the radiator before leaving for NY. Really wasn't dirty on
> my either.
>
> I have made sure that the coolant is as full as possible. Started
> and ran engine. Coolant does not get up to operating temp, according
> to the dash gage. The temp is around 160, which is where it stays +/-
> 5 degrees.
>
> Went for a ride, temp never made it to 190 where it used to only
> deviate 5 degrees.
>
> The coolong fan did kick on a few times, but according to the gage,
> it should not have.
>
> Too hot, too cold, poor circulation. Pump? Thermostat?
>
> Jay Darst
> 85PT40 6V92DD MTB654CR
> Springhfield, IL
>
> --- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
> wrote:
> >
> > Jay last week or so I took the louver cover off and cleaned the
> radiator
> > with Gunk and lots of water. Used garden hose vice pressure
> washer. It
> > wasn't that dirty but some folks told me that it doesn't take much
> dust and
> > grime to affect temps. I hope a good cleaning is all you need.
> >
> > On 01/07/06, Jay Darst wrote:
> > >
> > > Gang,
> > >
> > > My Bird just experienced an over heat situation.
> > >
> > > The temp gage read about 220 degrees, cooling fan on,
> winter/summer
> > > switch in the winter position, all this would not bring the temp
> > > down.The antifreeze was full.
> > >
> > > Happened while Bird was idling. I assume the thermostats need
> > > replaced. That will be by first repair,I suppose?
> > >
> > > In the last 3 weeks been on a 2,000 mile round trip and a 400
> mile
> > > round trip. No problems.
> > >
> > > Any suggestions or comments are appreciated.
> > >
> > > Thanks
> > > Jay Darst
> > > 85PT40 6V92 MTB654CR
> > > Springfield, IL
> > >
> > >
> > >
> >
> >
> >
> > --
> > Rob, Sue & Merlin Robinson
> > 94 WLWB
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>

---
Pete Masterson

========================================================
Aeonix@...
Author of Book Design and Production: A Guide for Authors and Publishers
Cover and Book Design, Layout, and Production
Voice & FAX: (510) 222-6743 -- 9AM to 5PM M-F Pacific Time
Visit my web site at http://www.aeonix.com for publishing hints
P.O. Box 20985, El Sobrante, CA 94820-0985
========================================================

[birdboat44]

Jay, Jack Jones here, the only thing that would cause sudden over
heating would have to be one the thermostats or the fan did not come
on. My 8v92 while idling will not heat up enough to turn the fan on.
You can bet it will happen again.
Jack
87 Pt 40 East Tn right next to Gatlinburg

[Pete Masterson]

This afternoon's mail brought me the June copy of Bus Conversion
magazine ... and there was an article describing installing a water
spray system for the radiator to improve cooling of a 6V92.

The writer explained that "most of the charter bus operators" running
from LA to Las Vegas have installed water spray systems to keep the
engines cool while crossing the desert during the summer. The article
went on to describe how one could fashion a system using drip
irrigation 'sprinklers' and an electric pump controlled by a switch
by the driver.

Elsewhere in the magazine, I noticed an ad for B&B Coach Works in Las
Vegas that offers a number of items for motorhomes and bus
conversions including "radiator sppray systems".

Is this the answer to the heating problem (if the cooling system is
otherwise in good condition)?

> On Jul 1, 2006, at 12:40 PM, Jay Darst wrote:
>
> > Thanks Rob.
> >
> > I cleaned the radiator before leaving for NY. Really wasn't dirty on
> > my either.
> >
> > I have made sure that the coolant is as full as possible. Started
> > and ran engine. Coolant does not get up to operating temp, according
> > to the dash gage. The temp is around 160, which is where it stays
> +/-
> > 5 degrees.
> >
> > Went for a ride, temp never made it to 190 where it used to only
> > deviate 5 degrees.
> >
> > The coolong fan did kick on a few times, but according to the gage,
> > it should not have.
> >
> > Too hot, too cold, poor circulation. Pump? Thermostat?
> >
> > Jay Darst
> > 85PT40 6V92DD MTB654CR
> > Springhfield, IL
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
> > wrote:
> > >
> > > Jay last week or so I took the louver cover off and cleaned the
> > radiator
> > > with Gunk and lots of water. Used garden hose vice pressure
> > washer. It
> > > wasn't that dirty but some folks told me that it doesn't take much
> > dust and
> > > grime to affect temps. I hope a good cleaning is all you need.
> > >
> > > On 01/07/06, Jay Darst wrote:
> > > >
> > > > Gang,
> > > >
> > > > My Bird just experienced an over heat situation.
> > > >
> > > > The temp gage read about 220 degrees, cooling fan on,
> > winter/summer
> > > > switch in the winter position, all this would not bring the temp
> > > > down.The antifreeze was full.
> > > >
> > > > Happened while Bird was idling. I assume the thermostats need
> > > > replaced. That will be by first repair,I suppose?
> > > >
> > > > In the last 3 weeks been on a 2,000 mile round trip and a 400
> > mile
> > > > round trip. No problems.
> > > >
> > > > Any suggestions or comments are appreciated.
> > > >
> > > > Thanks
> > > > Jay Darst
> > > > 85PT40 6V92 MTB654CR
> > > > Springfield, IL
> > > >
> > > >
> > >
> > > --
> > > Rob, Sue & Merlin Robinson
> > > 94 WLWB
> > >


Pete Masterson
aeonix1@...
'95 Bluebird Wanderlodge WBDA 4203
El Sobrante, CA

[davidkerryedwards]

Cheap effective way of increasing the cooling capacity of a system in hot
climates. It's a
version of a swamp cooler which are common in desert climates and even used to
be
available for installation in car windows back in the 50's.

Kerry

--- In WanderlodgeForum@yahoogroups.com, Pete Masterson wrote:
>
> This afternoon's mail brought me the June copy of Bus Conversion
> magazine ... and there was an article describing installing a water
> spray system for the radiator to improve cooling of a 6V92.
>
> The writer explained that "most of the charter bus operators" running
> from LA to Las Vegas have installed water spray systems to keep the
> engines cool while crossing the desert during the summer. The article
> went on to describe how one could fashion a system using drip
> irrigation 'sprinklers' and an electric pump controlled by a switch
> by the driver.
>
> Elsewhere in the magazine, I noticed an ad for B&B Coach Works in Las
> Vegas that offers a number of items for motorhomes and bus
> conversions including "radiator sppray systems".
>
> Is this the answer to the heating problem (if the cooling system is
> otherwise in good condition)?
>
> > On Jul 1, 2006, at 12:40 PM, Jay Darst wrote:
> >
> > > Thanks Rob.
> > >
> > > I cleaned the radiator before leaving for NY. Really wasn't dirty on
> > > my either.
> > >
> > > I have made sure that the coolant is as full as possible. Started
> > > and ran engine. Coolant does not get up to operating temp, according
> > > to the dash gage. The temp is around 160, which is where it stays
> > +/-
> > > 5 degrees.
> > >
> > > Went for a ride, temp never made it to 190 where it used to only
> > > deviate 5 degrees.
> > >
> > > The coolong fan did kick on a few times, but according to the gage,
> > > it should not have.
> > >
> > > Too hot, too cold, poor circulation. Pump? Thermostat?
> > >
> > > Jay Darst
> > > 85PT40 6V92DD MTB654CR
> > > Springhfield, IL
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
> > > wrote:
> > > >
> > > > Jay last week or so I took the louver cover off and cleaned the
> > > radiator
> > > > with Gunk and lots of water. Used garden hose vice pressure
> > > washer. It
> > > > wasn't that dirty but some folks told me that it doesn't take much
> > > dust and
> > > > grime to affect temps. I hope a good cleaning is all you need.
> > > >
> > > > On 01/07/06, Jay Darst wrote:
> > > > >
> > > > > Gang,
> > > > >
> > > > > My Bird just experienced an over heat situation.
> > > > >
> > > > > The temp gage read about 220 degrees, cooling fan on,
> > > winter/summer
> > > > > switch in the winter position, all this would not bring the temp
> > > > > down.The antifreeze was full.
> > > > >
> > > > > Happened while Bird was idling. I assume the thermostats need
> > > > > replaced. That will be by first repair,I suppose?
> > > > >
> > > > > In the last 3 weeks been on a 2,000 mile round trip and a 400
> > > mile
> > > > > round trip. No problems.
> > > > >
> > > > > Any suggestions or comments are appreciated.
> > > > >
> > > > > Thanks
> > > > > Jay Darst
> > > > > 85PT40 6V92 MTB654CR
> > > > > Springfield, IL
> > > > >
> > > > >
> > > >
> > > > --
> > > > Rob, Sue & Merlin Robinson
> > > > 94 WLWB
> > > >
>
>
> Pete Masterson
> aeonix1@...
> '95 Bluebird Wanderlodge WBDA 4203
> El Sobrante, CA
>

[Jay Darst]

Jack(and the rest of the gang here),

I removed both thermostats from the 6V92.

Threw them and thermometer, along with 1 of the new thermostats, in a
pan of water on the stove. When the water temp was 178 degrees, the
new thermostat began to open. The old thermostats remained closed up
to 190 degrees. The thermostat from drivers side required 205 degrees
to open and then it didn't open very much, maybe 1/3 as much as the
new thermostat. The passenger side thermostat opened at 190 degrees
but only about 1/2 as far as the new thermostat.

Found a heater hose that is located along the passenger, outer frame
rail, just forward of the drive tires had a little leak. I guess that
lost enough coolant to cause the water pump to cavitate and not move
coolant.

I received an e-mail from Tom Warner who indicated that if the temp
were to exceed 195 degrees, its bad for them. Something about sleeve
seals... I need to look into that. I have been to 200 degrees thru the
desert and the mountains many times.

The oil level is correct, no signs of anti freeze. The antifreeze
looks good, no signs of oil.

Is there a trick to refilling the coolant so as not to have air
pockets in the coolant?

If you have, yourself, flushed your cooling system and refilled it, I
would like to hear of the procedure.

Thanks AGAIN!

Jay Darst
85PT40 6V92 MTB654CR
Springfield, IL



--- In WanderlodgeForum@yahoogroups.com, "birdboat44"
wrote:
>
> Jay, Jack Jones here, the only thing that would cause sudden over
> heating would have to be one the thermostats or the fan did not come
> on. My 8v92 while idling will not heat up enough to turn the fan on.
> You can bet it will happen again.
> Jack
> 87 Pt 40 East Tn right next to Gatlinburg
>

[Tom Warner]

Jay here is the procedure from my Detroit Diesel factory manual. I
would do the leakage test on it first

Tom Warner
Vernon Center,NY
1985 PT 40



At 11:50 PM 7/1/2006, you wrote:
>Jack(and the rest of the gang here),
>
>I removed both thermostats from the 6V92.
>
>Threw them and thermometer, along with 1 of the new thermostats, in a
>pan of water on the stove. When the water temp was 178 degrees, the
>new thermostat began to open. The old thermostats remained closed up
>to 190 degrees. The thermostat from drivers side required 205 degrees
>to open and then it didn't open very much, maybe 1/3 as much as the
>new thermostat. The passenger side thermostat opened at 190 degrees
>but only about 1/2 as far as the new thermostat.
>
>Found a heater hose that is located along the passenger, outer frame
>rail, just forward of the drive tires had a little leak. I guess that
>lost enough coolant to cause the water pump to cavitate and not move
>coolant.
>
>I received an e-mail from Tom Warner who indicated that if the temp
>were to exceed 195 degrees, its bad for them. Something about sleeve
>seals... I need to look into that. I have been to 200 degrees thru the
>desert and the mountains many times.
>
>The oil level is correct, no signs of anti freeze. The antifreeze
>looks good, no signs of oil.
>
>Is there a trick to refilling the coolant so as not to have air
>pockets in the coolant?
>
>If you have, yourself, flushed your cooling system and refilled it, I
>would like to hear of the procedure.
>
>Thanks AGAIN!
>
>Jay Darst
>85PT40 6V92 MTB654CR
>Springfield, IL


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

[Gregory OConnor]

Jay, maybe the bus was in drive with the e brake on?? I cant get
anything to warm up to 190 while idling. At days end as I park my
truck, I run the fan override to cool temps and turbo down. If I
forget to turn the override back to automatic, when I restart the
truck in the morning, the temp climbs up quick as the fan load is on
the engine at low RPM. The fan cools the radiator and only needs to
be on when the thermostats are open. Too often folks reengineer the
cooling by putting in low temp tstats which open prior to needed
optimal running temp.

Dirty Air filter can heat an engine up at idle. Low oil press will
cause heat (thus need for high idle). Pissy injectors don't burn and
cause a load at idle. Bad gauges re always a possibility.

I often wanted to record temps via a raytec laser gun at different
parts of the block and cooling system on the bus when it is run one
hour-- after idle-- after hill climb and high temp. This would help
pinpoint problem areas when an issue arises. It works good when
checking brakes hubs and other comparable moving parts. ( I'll check
the temps this weekend after I takes the Christmas lights down)

I found a green stain on my sight glass in the puke tank (pt40 '94)
and simply removed it to clean the glass. The green stain caused
false full reading.

Gregory O'Connor
94pt Romoland Ca

--- In WanderlodgeForum@yahoogroups.com, "Jay Darst"
wrote:
>
> Gang,
>
> My Bird just experienced an over heat situation.
>
> The temp gage read about 220 degrees, cooling fan on, winter/summer
> switch in the winter position, all this would not bring the temp
> down.The antifreeze was full.
>
> Happened while Bird was idling. I assume the thermostats need
> replaced. That will be by first repair,I suppose?
>
> In the last 3 weeks been on a 2,000 mile round trip and a 400 mile
> round trip. No problems.
>
> Any suggestions or comments are appreciated.
>
> Thanks
> Jay Darst
> 85PT40 6V92 MTB654CR
> Springfield, IL
>