Question about 1999 Jeep Wrangler

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Which hose is which?

I bought a radiator flush kit which said to cut the heater hose and put the T device in... I need to know which one to cut to install the T so that the garden hose can be hooked up.

I have located two hoses coming from the firewal, but cannot see where one of them enters the engine vs. the water pump


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  • Dr. Ken Mar 08, 2009

    Fine, I will try that. I'm assuming you mean disconnect the hoses from the firewall and see which one has water coming out and That's the heater hose?



    Also, wouldn't just draining and filling with cleaner, letting engine run for a long time, drain, do again, etc etc until it's all clear, then add antifreeze/coolant?

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Remove one hose (which ever is easier to get off) from the heater core and start the engine if the hose a water coming out then it is the wrong hose if water comes from the heater core then you have the correct hose. I know this sounds tedious but it is the sure way to tell. Do not use plyers to remove the hose, this will bend the end of the pipe and make the hose leak. You are better off to remove the clamp and cut a short slice, the length of the heaer core pipe, and then shorten the hose to put it back on.

Posted on Mar 08, 2009

  • thomas cole Mar 10, 2009

    Yes the hoses that connct to the fire wall. My appoligies you get used to industry jargen and it is hard to get away from. Further more you may just want to take both hoses off of the firewall and put the T in there. This will keep your heater core from getting flushed, heater cores have a tendancy to leak after you flush the system.

    You will never get all the anti freeze out by just draining it. There is alot of very small passages in the engine block that the anti freeze runs through. the engine must be running and get up to operating tempature in order for the coolant to circulate through the entire engine.

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