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Can you bypass the heater core on a rx8

Heater core is out and we live in arizona, can I just bypas the heater core until later. Very expensive part.

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Posted on Jan 02, 2017

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SOURCE: leaking heater core in a 2001 ford escort

take the 2 heater hoses at the firewall and connect them together. you just need to make a LOOP that will leave the heater "out of the loop" either buy a length of heater hose or get a "splice connector' so you can connect them together.

Posted on Sep 17, 2009

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2002 Subaru Forrester no water in radiator and passenger side floor wet


Donna, your mechanic is both right and wrong. The heater for pretty much all cars comes from the hot coolant running through a heat exchanger (core) under your dash. This is the same coolant that runs through your radiator. Yours sprung a leak in the heater core under the dash - ergo, coolant in the pax floor and none in your radiator. Using a hose to bypass the heater core is a cheap way to avoid a very expensive repair. The downside is that you will have no heat for the car or to blow warm air on the windshield to remove "fog" - a safety issue. This is also a dumb idea if you live where winters are frigid. In summertime, what your mechanic suggested is a reasonable, temporary fix. In the wintertime, not so much.

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This is a very common problem on the Taurus, at least up until the 2001 model and possibly later. The Taurus design incorporates a bypass hose (near the firewall) that connects between the heater hoses entering and exiting the firewall in the engine compartment. As the Taurus ages (6 or 7 years old), the heater core under the dash increasingly gets clogged with gunk because the bypass hose provides a path for the coolant to bypass the heater core itself. The fix is to disconnect the heater hoses at the engine block (too difficult to disconnect these hoses at the firewall-no space) and flush the heater core through these hoses with a garden hose. Before doing this you must crimp (with vise grips and a rag to protect the rubber hose) the bypass hose--otherwise the flushing water will bypass the heater core. I attached the garden hose to an adapter that I could clamp into the heater hose to make the connection. BTW, the coolant in the radiator was a pristine lime green color -notice the dark brown color of the gunk flushed from the heater core. b4d9b81a-db6d-4a32-852d-2725671d69af.jpg d06ea83d-50ae-4178-a917-1275133ccd9c.jpg c195fd24-d013-4f9c-a878-5e49e1ff2612.jpg 2d1a9536-3c83-45c8-8d60-7eea7e95a4e8.jpg 1cc41e46-c4dc-4f8f-924c-4c751e5051f8.jpg

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im pretty sure u have to pull the whole dashboard out to change the heater core in that vehicle

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heater cores is probly pluged take a garden hose and try to flush it out. usualy the heater core is the waterpump bypas. it also could be that ur radiator fans arnt running

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1 Answer

Heater core


it is very simple to bypas the heater core just block the hose of coolant wich is going to core with some wodden roll, or any size of bolt, if you dont require the heater then just by pass it ,if you want to replce it you have to open dash board.

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1 Answer

The right floor board of my car is wet. and it has a stinky odor!


Probably a stinky but almost kinda sweet odor.... right?
That's antifreeze leaking from your heater core. Sometimes leaving the heater off will stop the leak temporarily, but sometimes in November leaving the heater off is not an option, unless you live in Florida. The correct procedure is to replace the core which is a very involved job. The last one I had done required removal of the dash and cost around $500.
You can bypass the heater under the hood but that is only a temporary cure and will disable your heater and then you have two things to fix later, the core and undoing the bypass.

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1 Answer

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take the 2 heater hoses at the firewall and connect them together. you just need to make a LOOP that will leave the heater "out of the loop" either buy a length of heater hose or get a "splice connector' so you can connect them together.

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The core is bad. You're lucky you have a catchpan and drain in your car... most people end up with coolant all over their feet when this happens! You have a few options. 1. You can pick up a bottle of cooling system leak stopper (available at Wal Mart and auto parts stores), follow the directions and see if that stops the leaking. 2. You can cut the heater lines and bypass the core entirely (obviously this is only a good idea if you live in Arizona or some other warm place). 3. Replace the core.

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1 Answer

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yes u can bypass the **** core. all you need to do is, take the two hoses going to the heater core, and take em off the heater core, take one hose comply off, and hook the other remaining hose were the other hose was hooked up at.. this will bypass your heater core, but keep in mind you will not have hot air in the cabin of the car..keith...

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