Question about 2001 Lincoln LS

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Ls is a v-6. Vehicle is overheating with no visible leaks. Water level in resivoir returns to normal when vehicle is turned off. When vehicle is driven, it runs hot . This condition occurs after approx. 20 min. of operation. It takes a much shorter period of time if I am stuck in traffic.

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  • glennw5nvwys Jul 15, 2010

    LS 2001, 6 cyl., 5spd. manual running hot. Takes approx 20 min for temp gauge to climb. It takes less time in gridlocked traffic. Fluid level in resivoir drops when car is in operation, returns to normal level when engine is shut off. Fluid resivoir and hoses were replaced when hose from fluid resivoir began leaking one week ago. Neither fluid resivoir cap or thermostat were replaced at that time. If fluid resivor cap and thermostat are replaced, and the problem persists, what is the problem?

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  • Lincoln Master
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There are multiple possible causes that can be grouped in two broad causes and all must be checked:
1 - the water isn't circulating normally. This can in itself have multiple causes: the fuel pump is faulty (corroded blades - the pump has become incapable of pumping - to check it open the top of the radiator with the engine running and watch if the water is flowing strongly); the thermostat doesn't fully opens(the only way to test that is to take it out and dump it in boiling water); there's a big accumulation of dirt and lime in the water circuit that it is blocking or severely restricting the water flow(the circuit must be cleaned with a lime remover solution - caustic, beware), there's an airlock so the water isn't cooling the top of the engine(the circit must be thoroughly bled). To fix any of that it implies that you must work on a hot engine and with chemicals - it's better to leave that to a pro
2 - the hot water isn't cooled - either the fans aren't working properly (to check them just look at them with the engine running - they should start spinning strongly long before the overheat appears) or the radiator cells are blocked by dirt (this is easy to fix, just wash the radiator thoroughly).

Posted on Jul 15, 2010

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  • Master
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The most likely reason is your thermostat is not opening enough or is stuck. Its usually one of the first things to fail in a cooling system. This is providing you are not loosing coolant. In the morning when you start the car up if there seems to be white smoke coming out the pipe, you should have some, I'm talking excessive then its possible you have deeper issue that will need a shop to diagnose. But if your not loosing any coolant the part will cost under $10 but labor could be what ever the shop charges per hour. It an hour job ro replace.

Posted on Jul 15, 2010

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Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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