Is there a bleed valve on these trucks for burping the new coolant? If so, where? If not, what process is used to rid the system of air. I ask because this will be the first time (for me) to do this maintanence on this truck, and I don't want overheating issues due to air. Also, I have never had a vehicle with the only coolant access at the overfill tank.
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Coolant flush question
- Thread starter Tovar
- Start date
NVW
Well-Known Member
There is a bleed screw on the top of the T stat housing.
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Do you know the proper procedure to ensure all air is out of the system?
Jakec
Member
in for info. I need to do this too.
JayTheCPA
Well-Known Member
Poking around in the 'Tech Library' is helpful 
Take a look here: http://www.thetruckstop.us/forum/threads/part-locations.9494/
In the 7'th pic, it is partially shown and labeled as "Air Bleed Valve".
The valve is on top of the thermostat housing (aka: crossover) and looks like a screw (flathead) mounted in a bolt.
Will need the engine at operating temperature and just open the screw until it starts to visibly expel gas or coolant. Do *not* completely remove the screw.
Take a look here: http://www.thetruckstop.us/forum/threads/part-locations.9494/
In the 7'th pic, it is partially shown and labeled as "Air Bleed Valve".
The valve is on top of the thermostat housing (aka: crossover) and looks like a screw (flathead) mounted in a bolt.
Will need the engine at operating temperature and just open the screw until it starts to visibly expel gas or coolant. Do *not* completely remove the screw.
FellowTraveler
Well-Known Member
That is an accumulator tank which also has a steam line vent at upper passenger side of the radiator. The reason for the steam vent is that the water in the EGW mixture always steams in the coolant galleys around the cylinder head and needs to vent.