2001 blue bird no heat

This topic contains 8 replies and was last updated by rex 9 years 1 month ago
February 25th, 2011 7:07am
2001 blue bird dt466e over heated three times on the driver.

replace radiator (cores bad on the bottom) replace thermostat ,fan clutch

water pump.also replace the first heater core by the front door.we had to

replace the heater valve inside the bus by the driver seat (broken)

now it only has heat high idle sitting then there is heat inside. when moving down the road no heat again. thanks for your help..
August 25th, 2015 8:08pm
any chance you may have a air lock? what is the engine temp running at now?
August 25th, 2015 8:08pm
Enough coolant in the system?
August 25th, 2015 4:04pm
I tried to push coolant through the heater hoses with a coolant flush machine. still have the same problem not over heating temp said 180. but no heat inside the bus. also the coolant goes empty in the tank. when i open it some of the level comes back up. i have the driver taking his bus every day thinking maybe the air pocket would come out..any help would be great...
August 25th, 2015 8:08pm
have you tried to pull both heater hoses off and blow through them is something blocking it?
August 25th, 2015 12:12pm
Check the simplest thing first, is the new thermostat working. If it the type that stays open once an over heat situation has happened it may not be closing to maintain your 180F at speed.
August 25th, 2015 2:02pm
im with ronm check that thermostat your system is probbly running super good!
August 25th, 2015 8:08pm
The stuck open thermostat makes sense to me as well. Also, check your coolant transfer pump on the firewall. Not sure where Bluebird installs them. Have you also checked for a restriction somewhere? The high revs move the coolant through but idle isn't cutting it. Pulling some heater lines and checking for flow wouldn't hurt.:)
August 25th, 2015 8:08pm
i've run into this before. check the return from the heater where it's plumbed into. it of course should be on the suction hose to the water pump or the lower hose. if that's ok it could be the water pump impeller is worn. if it's worn it won't have enough suction to help pull the water back from the system.

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