Question about 2000 Lincoln LS

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2000 Linc ls v8 auto question james from ILL.

No heat,change the thermo,because the coolant bottle cracked, my ? is how do i change the heater core,and how do i get to it , with out taking the hole dash apart

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Maybe you won't need to. On the fire wall you will see 2 hoses an inlet and an outlet.that go directly into the heater core. Sometimes the heater core is clogged. disconnect the hoses and use a water hose running at only a moderate flow. put it into one of the the inlet of the heater core and run water until you see clear coolant. Then do it on the outlet and run it until the coolant is clear. you are trying to remove any clogs the heater may have. if this does not work, check the heater control valve.move the temperature slider the one to control the temp inside the car. and see if you can hear anything move. Check to see what type it is it can be a vacuum controled vavle, or a cable hooked on to the valve or an electronic controled valve. if it is a vacuum controled valve, you can check to see if a vacuume hose is disconnected, if it is a cable type valve,check it by moving the temperature control inside the car open it and close it with your fingers if you can see it. But most likely it may be the heater core thats clogged.

Posted on Nov 30, 2008

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Is there a way to replace a coolant control valve on a Linc LS v8 00 preferred for a DIY . would like to have a idea . Thanks so much for your help.


If your talking about the heat inside the car, yes. It is vacuum operated. On the passenger side. The hoses are about 1 inch in diameter. The valve is spliced in one of them. Make sure the vacuum is present before replacing.

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The cooling fan is also hydraulic and has it's own power steering pump.
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You also could have air in your coolant system. You can't just add coolant on these models after you drain the system or let it run low on coolant. The degas bottles on these models also have a flaw, where they crack along a seam. Sometimes coolant will leak, sometimes not, depending on how high the crack is on the bottle. But what it is guaranteed to do is allow air into your system, which can cause havoc with overheating (air surrounds the thermostat so it doesn't open) and keep coolant from flowing, particularly through the highest point in the system: the heater core. There is a heater core bleeder valve attached to a line near the top of the degas bottle (next to the expension line up top) with a plastic, flathead srewdriver face. Turn the heat on high and run the system at idle for 5 minutes. Then open the valve and keep it open until a steady stream of coolant comes out. (It's like bleeding your brakes.) That will clear any air from the system and at least give you peace of mind that this is not your problem. Then run the motor at 2000 rpms, with the heat still on high, for about 5 minutes or until hot air starts coming out. Release the bleeder valve again until a steady stream comes out. Then let the system cool and check your coolant level and fill as needed. I'd pull the degas bottle and inspect it...should have been a recall.

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