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Re: no heat 98 lincoln mark viii
Sounds like you may just have an air column in the system.Try this,Remove the radiator cap,start the car,turn heat on high,wait for the car to reach normal operating temp,and add coolant as needed.(if you watch inside the radiator,as soon as the car reaches operating temp,the water level will drop,That is the time to add more)
Its probably the blend door... First try this.... http://www.markviii.org/LOD2/emergency_heat.htm If that works you need to replace the door. http://www.markviii.org/LOD2/blend_door_repair.htm I suggest making the arm on the new one strong, reinforce it....
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my 98 Blazer I had to replace radiator water pump heatercore and hoses. Had head gasket go. Once that happens air and dexcool corrode cooling system. Do you smell antifreeze? Are you loosing antifreeze? Check oil see if its another color not clear or black but i think light brown. Have you flushed out system?
You have a stuck air temperature control blend door problem. The blend door is what moves to divert air across the heater core and AC core to heat or coll the air or a combination of the hot and cold air streams, to blend them. To replace the part requires that the dash be removed from car as the door is located in the production.
i know you said you flushed the radiator i would flush the engine as well and make sure all is flowing good it also could be a blocked heater core flushing might help. whats happening when you idle up the engine you are forcing the water to flow through the restriction
I looked at my friends 1997 mark viii for no heat. Found info on fixing it online. It involved taking the dash completely apart. Like six hours. The problem most lincolns had, seemed to be black plastic lever for mix door cracked. You can not see this lever, but can access the gray lever it works with, I moved the gray lever and got heat.He Got lucky and found his problem was different. Disconnect battery for a minute or so and this should reset computer for climate control. Seems if mix door was not moving due to some sort of computer glitch. Has heat for now. Hope this can help someone and its not a broke lever.
the only thing you haven't replaced is the heater core, however even if that was plugged your engine still would not overheat because the heater core is on a by pass hose. my question to you is was the theromstat installed correctly? is the belt that rtuns the water pump routed correctly so that tyhe pump is turning the direction it should. these may sound like stupid questions but have know to happen. the sring part of the thermostat should face towars the intake of the engine if it is installed incorrectly it will cause no circulation of the coolant.like wise with incorrect routing of the belt if the water pump is turning the wrong way no coolant will circulate like it should. what can also happen is the replacement pump and/or thermostat were deffective. there is a such thing is the term "brand new junk" I can't tell you how many times i have replaced parts just to find out that they were deffective. my advice is to look over these area's again. if all is in order feel free to contact me here just click my user tab