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Old 05-21-2020, 11:47 PM   #1
Join Date: Jun 2019
Location: The Colony, Texas
Posts: 55
Year: 2000
Coachwork: Raised Roof compliments of Transcend Existance Bus
Engine: 7.6LNavistarDT466eDiesel Trans:AllisonMD3060Auto
Rated Cap: GVWR 32,000 LBS
Bus Heater Removal

This is the bus heater coolant flow lines and pump.
So I might have the flow direction reversed, but that shouldn't matter for this question.
I think that I can connect 1 to 5 with two 90s, some reused hose and 4 hose clamps.
My only real concern is if I can completely bypass that 12v pump between 3 and 5.
I think it's only needed for the heater circulation.
And the coolant will continue to circulate if I leave it out.
Also, I'll be introducing air into the system
Will this be sorted out after the fluid circulates a bit or is there something I should do to remove the air from the line?
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Michael_Grumbach is offline   Reply With Quote
Old 07-06-2020, 07:33 AM   #2
Join Date: Mar 2020
Location: Tacoma, WA
Posts: 55
Year: 2004
Coachwork: International
Chassis: RE300
Engine: DT466E
Rated Cap: 76
What you are saying *sounds* good...I have been wondering the same thing. I have installed heaters in yachts by simply adding the coolant lines and more coolant, so I would *assume* the reverse is the same idea. This is also a question I have had.

Anytime you introduce air into the cooling system, you should burp it out. Normally, you'd run the engine with the heat on high and the radiator cap off for a bit and as things naturally cycle through, the air will be forced out.

Hope this helps a bit.
jjaj823 is offline   Reply With Quote

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