Reply
 
Thread Tools Display Modes
 
Old 12-21-2016, 08:29 AM   #1
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 6,083
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
T-444E coolant overflow??

I ran the bus yesterday on a decent sized drive.. when I got back to the storage unit, I smelled coolant quite strong.. when I opened the hood I could see i had sprayed it all over the place..

im not sure where yet as I need to diagnose what broke.. it appears coolant got sprayed by the fan so I couldnt tell where it was coming from..

the top of the bottle was quite wet though with coolant running down the hoses.. I dont know if that was the source of the leak and it ran down to get blasted by the fan or not.. the radiator itself is dry and it still was pressurized (top hose was hard) when I shut it off..

however it did get me to wondering..

How does this Bus handle over-filled / overflowing coolant?

I did have a hose leak recently and filled the thing up on a pretty cold day..

looking at the bottle theres no vent hose going down to the ground or to another bottle.. so what happens when you over-fill by accident then run the bus out on the road? does it just build pressure till things break? does it vent out the cap and spill all over the engine compartment?

on my DT-360 theres the normal vent hose going off the top of the cap and down to the ground.. so an overfill and it blows a little on the ground..

on my T-444E theres not even a place for said vent..

there is a small hose near the top of the bottle that goes to the top of the radiator.. it looks like something that would help to get al lthe air to the bottle..

how are your Conventional T-444E's set up?

as for my coolant leak I'll look for it a little later.. although if it just blows out the cap, my whole issue may be that it was warmer yesterday and it vented excess.. just seems silly theyd build it to just blast it all over the place..

-Christopher
cadillackid is online now   Reply With Quote
Old 12-21-2016, 08:49 AM   #2
Bus Crazy
 
Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,365
Year: 1997
Coachwork: Thomas
Chassis: B3800 Short bus
Engine: T444E
Rated Cap: 36
I think you nailed it! If the expansion tank/reservoir is overfilled the coolant will come through the cap vent and make a bit of a mess. I've never had a problem as long as I respected the max fill line. Over that and things start getting messy.

Maybe with it being winter temps the tank should only be filled halfway between the max and min marks? I dunno..
__________________
My build page: Armageddon - The Smell of Airborne Rust
jazty is offline   Reply With Quote
Old 12-21-2016, 08:57 AM   #3
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 6,083
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
what is your cap? 10 PSI? thats what mine says it is on it.. of course without a tester I have no idea if im actually getting 10 PSI... I may replace the cap on general principle just because... although I ran it in texas and florida heat with my temp gauge riding the 210 line and never lost any.. but then I never filled it up till after I had a known hose-clamp leak around the T-stat housing.. I did have it changed when I got the bus..

interesting to know theyd build something that way.. no wonder the alternator is nice N shiny.. its probably been trashed by coolant before.. and replaced..

-Christopher
cadillackid is online now   Reply With Quote
Old 12-21-2016, 09:19 AM   #4
Bus Nut
 
Join Date: Oct 2016
Location: Pensacola and Crystal River, FL
Posts: 552
Year: 1998
Coachwork: AmTran International
Chassis: 3800
Engine: Navistar 7.6L
Are you sure the reservoir tank does not have a molded in channel from the top to bottom that dumps overflow?
Siamesed with the reservoir.
DoubleO7 is offline   Reply With Quote
Old 12-21-2016, 11:28 AM   #5
Bus Crazy
 
roach711's Avatar
 
Join Date: May 2010
Location: Farmington Hills, Mi (Detroit area)
Posts: 1,514
Year: 2000
Coachwork: Eldorado Aerotech 24'
Chassis: Ford E-450 Cutaway Bus
Engine: 7.3L Powerstroke
Rated Cap: 19
The cap on my 2000 7.3L Powerstroke is marked 16 psi. Coolant level in my overflow bottle will vary about an inch going from cold to hot. In my bottle if the level was, say, an inch over the "full cold" mark with a cold engine then I could easily imagine the bottle overflowing when hot.

I know the 7.3 and the 444 are set up similarly but I'd assume that cooling system psi should be the same in both. With that said, I do know what "assume" does to "U" and "me".
__________________
The Roach Motel
roach711 is offline   Reply With Quote
Old 12-21-2016, 11:44 AM   #6
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 6,083
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
the more I learn about the 7.3 / T-444E the more i realize how many differences there are...

the T-444E has no EGR on it, has a mechanical fuel pump, is plumbed factory with a return, the computers from 97-up are all different, the SERP belt setup is different, the turbo comes back a different part number, and just when I thought the internals are the same, i learn that the CAM is different due to the fuel pump lobe for the 444E, and even the head gaskets come back a different part number..

it appears things like the short block, heads, some of the sensors, injectors, lifters, pushrods etc are the same...

what is your red-line RPM on your ford 7.3? I know on my T-444E its 2700..

back to the coolant stuff.. yeah I agree on Assuming stuff... fortunately IH does a darn good job of stocking parts in columbus ohio and can look anything up by VIN... thus far theres been nothing done by its previous owner that wasnt stock..

and of course ALWAYS in the back of my mind with any coolant pressure issue is always the slight possibility a head gasket is starting to go... thats how my Peugeot diesel acted.. it started ever so slightly firing into the water jacket so id keep blowing coolant out the overflow... finally I figured out what it was when i started to get coolant in the oil... this one doesnt act like that.. (at least not yet).. but is something to keep in my mind..

-Christopher
cadillackid is online now   Reply With Quote
Old 12-21-2016, 11:49 AM   #7
Bus Nut
 
Join Date: Jun 2016
Location: Orange County, CA
Posts: 301
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
I used to have the same thing happen if I over-filled my coolant surge tank - the excess when it was hot would come out of the drain tube connected to the radiator cap and down onto the ground. I now have the tube going into a gallon jug to catch any overflow. I made marks on the surge tank's sight glass to indicate the maximum level it can be filled when cold, and the minimum level below which the Low Coolant Level sensor will shut down the engine.

John
Iceni John is offline   Reply With Quote
Old 12-21-2016, 12:01 PM   #8
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 6,083
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
Quote:
Originally Posted by Iceni John View Post
I used to have the same thing happen if I over-filled my coolant surge tank - the excess when it was hot would come out of the drain tube connected to the radiator cap and down onto the ground. I now have the tube going into a gallon jug to catch any overflow. I made marks on the surge tank's sight glass to indicate the maximum level it can be filled when cold, and the minimum level below which the Low Coolant Level sensor will shut down the engine.

John
thats the thing there is no vent tube.. I looked and its not molded into the plastic.. my DT-360 has the surge tank with the sight glass and a vent tube off the cap that goes to the ground..

it seems like we could park 65 busses side by side and no 2 would be alike

-Christopher
cadillackid is online now   Reply With Quote
Old 12-21-2016, 12:02 PM   #9
Bus Crazy
 
roach711's Avatar
 
Join Date: May 2010
Location: Farmington Hills, Mi (Detroit area)
Posts: 1,514
Year: 2000
Coachwork: Eldorado Aerotech 24'
Chassis: Ford E-450 Cutaway Bus
Engine: 7.3L Powerstroke
Rated Cap: 19
No idea on the 7.3 redline. There's no tach on mine but I drive it like an old lady for max fuel mileage.
__________________
The Roach Motel
roach711 is offline   Reply With Quote
Old 12-21-2016, 01:23 PM   #10
Bus Geek
 
Tango's Avatar
 
Join Date: Mar 2011
Location: Houston, Texas
Posts: 5,574
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
A leaking head gasket? Isn't that like a free "water injection system"?
Tango is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:29 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.