Question about 2000 Mazda MPV

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Good day we have a 7 seater mazda mpv w reg the car is losing coolant but no water is getting in the engine because the engine oil is not milky, but water is coming out of the air conditiong system at the back in the car thanks

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  • Jeffrey Turcotte
    Jeffrey Turcotte Apr 11, 2011

    rear heater core is leaking.

    Disconnect the negative battery cable.
    Set the rear heater control knob to the WARM position to open the water valve.
    Drain the cooling system into a clean container for reuse.
    Remove the driver-s seat.
    Disconnect the heater hoses.
    Disconnect the rear heater unit wire connector.
    Remove the rear heater unit attaching bolts and remove the assembly.
    Separate the rear heater unit attaching bolts and remove the heater core.



    To install:

    Install the heater core and assemble the rear heater unit.
    Install the assembly and the rear heater unit.
    Connect the rear heater unit wire connector.
    Connect the heater hoses to the heater core.
    Install the driver-s seat.
    Refill the cooling system.
    Connect the negative battery cable.

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Check heater pipes under the vehicle, as these have heater controls in the back of the car the pipes rust out causing coolant to leak out. cut the pipes and bridge them together as you dont require a heater in the rear of the vehicle. Costly if you cook the engine if its a V6, as you have to pull the engine out to do head gasket replacement.

Posted on Jun 01, 2011

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Posted on Jan 02, 2017

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1 Answer

We have mazda mpv 2000....it was overheating and


check the water pump and the heater core

Sep 20, 2014 | 2000 Mazda MPV

1 Answer

Coolant loss with no trace


Doesn't sound good at all. If the water is not running out on the ground on the floor, it can only be going into the engine or out the exhaust pipe. Have a look at the oil dipstick and see what level the oil is at. If you add water and the level increase, you know the water is going into the engine. If this happens, it turns the oil a milky white. Get it fixed fast before it destroys your engine. The other end of the car, check the exhaust pipe and see if water is coming out there. These faults indicate a cracked head, blown head gasket or blown water jacket. the last thing to check is if your car is an automatic with an oil cooler in the radiator, it could be filling the auto transmission with water... Another disastrous thing to happen... If there is any reddish coloured fluid in the radiator or if the transmission fluid has gone a milky brown colour, that could be the problem. Either way, hidden losses of coolant usually mean major repairs...

Jul 04, 2014 | 2001 Mazda Millenia

1 Answer

Losing coolant


take it to a radiator shop and have the system pressure tested
if the pressure remains static at pressure start the engine and see if the pressure drops
if it does indicates a water pump seal when running
check the drain hole under the pump housing for stains and water marks
something the garage should have done

Jun 23, 2017 | Volkswagen Cars & Trucks

1 Answer

Car overheating


You may have a blown engine head gasket. Check your oil to see if it is milky because water is getting into the oil, and check the water to see if oil is getting into the coolant.
If you have either of these, you may need to have a new head gasket for the engine, and hopefully you do not have a cracked engine head.
This will require a fair bit of work to fix correctly. Your local garage or mechanic may be your next call.
There are some products you can use in the coolant for either of these, but it is only a temporary fix.

Jan 31, 2014 | 2001 Mazda MPV

1 Answer

My mazda mpv 2001 coolant leaking somewhere. Filled it Saturday full line and is at low level monday afternoon.Where is it going? Van does not overheat


1. External Leaks
You need to get the vehicle to a mechanic to check all flexible coolant hoses, hose connections, around the exterior of the water pump and the entire radiator. To do properly the vehicle also needs to be on a hoist. If there is an external leak you should find coolant dripping from the front of the car while the engine is idling and the cooling system is fully pressurized. However it depends how bad the leak is and it's location.

2. Internal Leak

If coolant is leaking into the engine this is a serious problem and needs to be identified by a competent mechanic. For example, if you have a blown head gasket coolant will blow into the engine and contaminate the engine oil. If you check the oil in the engine's sump it should be completely free from coolant contamination.
You should also check the coolant in the radiator for any signs of oil contamination. If there is coolant in the oil then there will also likely be engine oil which has blown into the engines coolant passages and then mixed with the coolant.
IF you can find traces of coolant in your engine oil (or oil in the coolant) the likely problem will be a blown head gasket and the head on the engine will need to be removed and inspected .

Blown head gaskets are usually a result of an owner allowing the engine to overheat as a result of low coolant level, failed water pump or faulty thermostat. Overheating can also cause major damage to the head on the engine.

Jan 19, 2011 | 2004 Mazda MPV

1 Answer

I have milky oil in my motor


if your car ony doing short runs it builds up condensation and gives your oil milky effect
or there is water getting into it
solution give car a good long run and the water should evaporate when engine well warmed up
other wise check water level make sure not losing water in to engine oil

Apr 12, 2010 | Volvo S60 Cars & Trucks

3 Answers

How to fix a blown head gasket on a mazda rx8 just went out to star my can and nothing there is yellow stuff on the dip stick


the is no headgasket on a rotary engine....This milky substance does not affect engine performance or any other functions of the vehicle. During cold weather, moisture contained in blow-by gases (exhaust , oil, fuel, water vapor) is cooled by the intermediate housing wall and condenses due to difference in temperature. A chemical reaction between the moisture reacts and the engine oil in the intermediate housing will yield the milky fluid. This fluid then eventually dissipates
as the engine warms up to full operating temperature.

The milky fluid does not affect the quality of the engine oil and therefore the engine performance is not affected either. Mazda has verified that the amount of moisture in the oil is within the acceptable standard for motor oils commonly found in the market.

However, you should verify that the coolant reservoir is full and that there is no sign of engine coolant leakage.

You can also go to you Mazda dealer and ask for a new oil level gauge tube plastic insert which has been developed as a countermeasure to keep the milky substance off of the dipstick (however, the substance will still be in there- it's a cosmetic fix only).

Nov 15, 2009 | 2005 Mazda RX-8

3 Answers

Whiteish gunk on oil dipstick


Wankel Rotary engine guys no headers or gaskets

This milky substance does not affect engine performance or any other functions of the vehicle. During cold weather, moisture contained in blow-by gases (exhaust , oil, fuel, water vapor) is cooled by the intermediate housing wall and condenses due to difference in temperature. A chemical reaction between the moisture reacts and the engine oil in the intermediate housing will yield the milky fluid. This fluid then eventually dissipates
as the engine warms up to full operating temperature.

The milky fluid does not affect the quality of the engine oil and therefore the engine performance is not affected either. Mazda has verified that the amount of moisture in the oil is within the acceptable standard for motor oils commonly found in the market.

However, you should verify that the coolant reservoir is full and that there is no sign of engine coolant leakage.

You can also go to you Mazda dealer and ask for a new oil level gauge tube plastic insert which has been developed as a countermeasure to keep the milky substance off of the dipstick (however, the substance will still be in there- it's a cosmetic fix only).

Hope this helps

Jan 22, 2009 | 2004 Mazda RX-8

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