Having problems with your Lincoln LS ?

2004 Lincoln LS 3.9L At first the gauge would do the the red and then drop back down as if nothing ever happened and showed no signs of overheating. I used a temp gun to test the pipe at the t-stat and temp was normal. Now it is showing signs of overheating and it seems to be low on coolant every time I check it. No visible signs of a leak. I am thinking that the t-stat is sticking and boiling enough coolant out that by the time I get home there is no more leaking to be seen. Replace t-stat

Posted / edited by AnonymousUser on : 19-04-2021

Answers :

Before you go out and buy correct antifreeze,thermostat and gasket and invest some sweat. Have the vehicle 's cooling system presuure tested. The tester is fairly cheap ($50.00) to purchase. Just make sure you get the proper attachemnt for your vehicle's radiator or recovery tank to perform the test. If you choose to have it done by a repair shop thats even better . They will probably charge you $50.00 to have it tested and if you give them the repair most shops loose the diagnosis fee.
\015\012If there is bottle necking in the hose going to the thermostat your correct in replacing it. However,if there is no bottle necking and the fan is working
\015\012now your looking at a bad head gasket. Check coolant recovery tank for signs of oil in coolant (usually milky substance) and pull spark plus to ceck for signs of coolant on them..
\015\012Lastly get a good look at water pump . look for signs of leakage by its weep hole. Then remove the belt and with a hand on its pulley try to move it sideways or up and down. If its loose its your culprit. Good luck
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