BYD e6A Owner's Manual page 119

NOTICE
Never add any rust inhibitor or other
additives to the cooling system, since the
additives may not be compatible with the
coolant or motor components.
Replace coolant
Clean and refill the coolant based on the time
elapsed or miles driven recommended in the
regular maintenance chart. Only use BYD
original long-life antifreeze coolant. Any use
of non-original coolant or water could result in
cooling system rusting and deposits
accumulating.
The operation of coolant draining is
performed under the vehicle. Therefore, it
should be done by an experienced technician
unless you are familiar with it and have proper
tools.
BYD e6A AUTO Owner's Manual
a. Adjust the power switch to ON. Make sure
the DUAL indicator lamp has been off.
b. Open the engine cabin. Confirm that the
motor, DC-DC, motor controller and
radiator have cooled down and can be
touched by hand.
c. Turn the radiator cap counterclockwise
(without pressing down), until it cannot be
turned any more. Hence, the residual
pressure in the cooling system can be
discharged completely.
d. To remove the radiator cap, turn the cap
counterclockwise while pressing it.
e. Unscrew the coolant drain valve at the
bottom of radiator, from which the coolant
will be drained out.
f. Remove the expansion tank assembly bolts.
g. Remove the expansion tank from the
bracket (pull it upward), and install it in
place when the coolant is drained.
Reinstall the assembly bolts.
h. Retighten the coolant drain valve at the
bottom of radiator after the coolant is
drained completely.
i. Refill the radiator with BYD original
glycol-based long-life antifreeze coolant
until the coolant level reaches the lower
edge of the coolant filler neck. The coolant
does not require Premix.
Cooling System capacity 7 L.
j. Power the water pump to run for
approximately 5 minutes, and then power it
off.
k. Refill the radiator with coolant until the
coolant level reaches the lower edge of
coolant filler neck.
l. Refill the expansion tank with coolant until
the coolant level reaches the upper limit
mark (MAX), and install the expansion tank
cover.
BYD e6A Operation and Driving 2-5