Question about 1991 Mazda Navajo

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Coolant leak 1991 mazda navajo

I have coolant leak from 1991 navajo 4.0 L. I think it's coming from heater core

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If you smell antifreeze ,and belive me youll know its antifreeze ,inside the car or the windshield will fog up when defrost is on ,you have bad heater core

Posted on Aug 26, 2008

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I have a 1991 Mazda Navajo and put a new master cylinder on it and now I have brake pedal fade .


bleed the whole system back to front..still fade you are getting air somewhere... may have to bleed the master out of the car then put back

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When I pour coolant into my 1991 Mazda Proteges radiator, it starts to fill then I see it leaking out of the front of motor. What could be the issue?


The leak you have my friend is either the Water Pump, any burst water hose (s) or any core plug (s). You need a qualified mechanic assistance.

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929 Mazda (1992) No Heat But A/C Works I have a 929 Mazda 1992 year. Does not blow any heat. I noted that the 30 amp fusible link for the heater was busted. Replaced it but still no heat. A busted fuse...


First check your fluid in your radiator if its low your heater will not work. Check all your heater hoses and make sure they are not kinked.
Your heater core may be plugged That will stop the heat flowing as well. If it's the heater core it will have to come out and replaced most likely. Not sure if there is a heater valve on that car.

Mar 05, 2017 | 1992 Mazda 929

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While driving, I lost coolant and it got my shoes wet! I think the heater core is leaking, what do you think?


yes,heater cores bad. when the heater core is bad,they leak into the floorboard. suggest you loosen radiator cap and take to your mechanic.loosen the radiator cap only reduces the pressure to your radiator,you will not have heat,but your engine should not overheat also. thank you for choosing fixya.com

Jan 24, 2011 | 1991 Alfa Romeo 164

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On a 1994 Mazda Navajo , looking for the heater hose's part that controls the the heater thats mounted on the firewall


If you mean the part the hoses go on to, it is called a heater core and most parts stores have them in stock

Sep 25, 2010 | Mazda Navajo Cars & Trucks

1 Answer

I have water leaking from the bottom of my dash on the passenger side of my 1991 cadilac broughan, what could be the problem


It's probably the core in the heating system. Coolant from the radiator is circulated through a very small heater core inside the car to provide heat. It will probably leak worse if the heater is turned on, since that allows pressurized coolant into the heater. The fan speed won't matter, just whether the heat lever is set to Hot or Cold.
If you open the hood, you should see 2 hoses going to the firewall near where your leak is. Usually, the hoses attach to the core there at the firewall. Typically, they are black, about 3/4" -1" in diameter. There is a small chance one of the hose clamps is loose, and the coolant is dripping from it, and running inside the car, in which case you just need to tighten it.

Aug 12, 2010 | 1991 Cadillac Brougham

1 Answer

Replacing the heater core in 2000 mazda b3000


From Haynes Repair Manual #36071, Ford Ranger Pickups 1993 - 2005 and Mazda Pickups 1994-2005 B2300, B2500, B3000, B4000: (1)Disarm the airbag system; (2)allow the cooling system to completely cool down; (3)using a thick cloth for protection, turn the radiator filler cap to the first stop; (4)step back and let the pressure release; (5)once the pressure has been released, completely drain the cooling system; (6) working within the engine compartment, loosen the ****,ps on the heater hoses at the engine compartment side of the firewall, twist the hoses and carefully sepseparate them from the heater core tubes; (7)plug or cap the heater core tubes to prevent coolant from spilling into the passenger compartment when the heater core is removed; (8)place a plastic sheet on the floor of the vehicle to prevent stains if the coolant spills; (9)remove the instrument panel; (10)remove the PCM heat sink and ground strap; (11)remove the heater plenum chamber; (12)separate the heater core from the heater plenum chamber; (13)installation is the reverse of the removal with the following additions; (a)fill the cooling system; (b)run the engine, check for leaks and test the heater

Aug 21, 2008 | Mazda B3000 Cars & Trucks

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