Question about 1998 Lincoln Navigator

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Coolant coming out of overflow tube above the heat shield of the exhaust system not sure if theres a blockage or what any suggestions was debating if i should flush it or what i recently had a radiator leak so added stop leak to it.

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  • robprpich Oct 13, 2010

    no its not to the reservoir its actually underneath next to the bottom end of the engine temp stays fine just spraying coolant after shutting off

  • robprpich Oct 13, 2010

    the end of the hose is just wide open not a break or a leak its dumping right from that hose

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  • Lincoln Master
  • 17,970 Answers

Are you talking about the hose that goes from the radiator to the overflow tank? If so then a leaking hose means exactly that, there is a hole in the hose. Sounds like the cap is doing what it is suppose to. The coolant expands some throughout the cooling system usually because of small air bubbles that just cant get out. Radiator caps are rated for a certain pressure, when the pressure is overcome then fluid is allowed to transfer from the radiator to the overflow, hence the name. If you have coolant spilling out its either because you overfilled the overflow tank or because you have the hose is leaking. What did the temperature gauge read on the dash?

That could be from a bad cap/seal. Try bleeding it again, those systems hold alot of air due to the front coolant hoses being above the bleed screw. If you have air in the system it can push coolant out the overflow.

Also, maybe a stuck thermostat, check/replace that and the radiator cap.

Keep us updated.

Posted on Oct 13, 2010

  • ZJ Limited
    ZJ Limited Oct 13, 2010

    Its possible that one seal or gasket are loss or broke, dry all the devices, coudl use air compressor, then warm the engine, and turn off to check exactly where is this wrong. It is normal that the leak was present when the engine is off, that is caused by cooling and release of pressure.

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Also, the procedure for bleeding the coolant system is critical; if you need those instructions please post the question.

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Thermostat assembly 2.4L 87953024.gif

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