Question about 1991 Mitsubishi Montero

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BLOCKED heater core

How do you bypass the heater core pajero

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  • Anonymous Mar 22, 2014

    can i bypass my heater core with out damaging engine

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Remove one of the heater core hoses at the bulk head or firewall and loop together where they go to the engine so no coolant goes into cab (through firewall)

Posted on Jun 26, 2009

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Why is heater blowing cold air?


Could be that your heater matrix is blocked or has air in the system

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These cars are notorious for having blocked heater cores, causing the heater to blow cold air. That's because there is a heater core bypass hose near the firewall that allows the coolant to bypass the heater core. Eventually the heater core fills with gunk and no coolant passes through it. You'll need to disconnect the hoses from the heater core at the firewall and flush the core using a garden hose. Flush both ways till water runs clear. If you can't access the heater core fittings at the firewall, then follow the hoses from these fittings back to the engine and disconnect them at that point and flush from there. If you flush from the hoses in this manner, it is important that you clamp off the bypass hose at the firewall with a vice grip pliers.
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1 Answer

My Wife's care overheats and the heater only blows out cold air.


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I have a 99 subaru b4 twin turbo that has a blocked heater core im wanting to bypass the hoses in the motor till i get the old heater core out & recond? how do i go about the bypass side of things


Find the two hose that go from the engine bay into the car Get a length of heater hose and go from where one fits on the engine over to where the other fits on the engine and connect these points together

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I have no heat on my 93 silverado. i have replaced the heater core,thermostat,and radiator. I checked the blend door while I had the heater core out and it works fine.With the heater hose that goes to the...


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1998 Ford Taurus, heater won't blow hot air through any vent including defrost, coolant level is okay, no heat no matter how long car is run, car doesn't overheat, can't get warm air even if run at air...


common problem is the water resivor cracks up at the bottom... it appears that your water level is fine because the car doesnt over heat but i am willing to bet that resivor doesnt have water to the top. The radiator will hold just enough water to keep it cool. I replaced mine 3 times the sulution is doing to sound weird but go to the junk yard and get one off a murcury sable. dont know why but the sables res doesnt crack like that

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1989 Suzuki Escudo heater does not get hot. I've tried a new thermostat but still no go. There hose going into heater is hot to touch & the hose out is just warm. Do they have heater tap in heater box?...


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