I have a 2002 lincoln ls v6 and is overheating with the ac on i have change water pump ts tat vale cover gaskets ignition coils new water coolant i let the car run with heat on and it will runs for about 30 min when a change to ac it gets hot immediately im spending too much money and im afraid to change something else that it may not be any sugestions please help Thanks

SOURCE: 85 nissan 300zx turbo

alternator and mass air flow meter.
see my solution above.....
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SOURCE: my bmw 316i coupe 1998 is overheating

Good point above. Does the fan come on?

If you have no heat, you have air in the heater core.

You say the head gasket is ok because yoou have no oil in the water. Many times the head gaqsket blows combustion into the cooling system only. Get the car up to temp with the radiator cap off, put it in gear, hold the brake and load the engine. If you have a lot of bubblls out of the radiator, you have a blow heade gasket or cracked head.

Check the ignitin timing. Old BMW's would overheat in a heart beat with retarded Ignition timing.

My bet is head gasket because the heater core is air bound

good luck

SOURCE: 2002 Lincoln LS, V6 overheats

Did you purge the air out of the syst.? Also you replaced the fan but are they coming on? have you checked the fuses and relays? if all this is ok then is the computer comanding it on? Is the computer getting correct info from Eng coolant temp. snsr (ECT)

SOURCE: 1993 Toyota Camry V6: Coolant Overheating Problem.

how do u change the water pump in a 1993 toyota camry v6 engine?

SOURCE: I have a 2002 Lincoln LS heating and cooling issue

First scan for codes. Is it a v8 0r v6?