How do you bleed air from the cooling system of a Mazda MPV?
It is a BAD problem since until the bubble is cleared, the
engine will continue to boil over an spew coolant. If you don't
have time to heat and cool the engine several times, thus allowing
for uptake from the reservoir, you must apply immediate action.
PLUS for some reason the bigger block v6 Mazdas have a tendency to
rust up real bad and clog the heater core.
So here is my solution.
1. Put a large clean pan under the radiator plug and drain
coolant. You will reuse since it is now $12 a gallon.
2. Remove radiator cap and cut the heater hose a few inches from
the firewall or valve on the passenger side. Permanently Install a
Tshaped flush fitting.
3. Re-install radiator drain plug and attach garden hose to
flush fitting. Put a rag or drain spout on the open radiator.
4. Run the engine and flush via the garden hose until water runs
clean.
5. put at least 4 ounces powdered oxalic acid or liquid
phosphoric acid into the radiator and replace cap. Put cap on flush
tee. Run engine at least 5 minutes after approaching normal heating
range.
6. Repeat steps 4 and 5 as necessary.
7. After the last flush add 6 tablespoons bicarbonate of soda
run for 5 minutes then flush to clear water.
8. Filter and refill with original coolant. Top off with fresh
antifreeze/water.
9. carefully open lid on flush Tee to bleed air out of
system.
NEVER use lye, sodium hydroxide, easy off oven cleaner, Drano
etc. These lye based products will MELT aluminum.
