Replacing the thermostat on a cadillac deville

Hi their,here's a link on replacing your thermostat,it doesn't really show it we'll,just follow the top hose from the radiator,that's where the thermostat is,easy to install.You don't need to drain all of the coolant,just a third would do,be careful cause the coolant could kill your pet if they were to drink it. GET 35 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS Here's a link to a new thermostat.You will also meed some thermostat sealant too,k. http://www.autozone.com/cooling-heating-and-climate-control/thermostat/duralast-thermostat/cadillac/deville/2000/8-cylinders-y-4-6l-sfi-dohc/417209_52254_1632_93207

Sounds like you have a clogged radiator, i would recommend trying to flush it out before replacing it.

I think you are having a 4.9L Cadillac. If so please follow the upper radiator to the engine. This would lead to the thermostat housing which holds the thermostat.

For 2000 Cadillac Deville 4.6L SFI DOHC 8cyl need to remove the air intake duct, then disconnect the radiator hose and remove the thermostat housing to remove the thermostat.

Fig. Thermostat and housing-typical

Hope helps.

hi. On a 4.9L follow the upper radiator back to the engine. This should be the thermostat housing. The thermostat should be inside.
On a 4.6L the thermostate is in the housing which is near the water pump drivebelts "on the coolant crossover housing". If this is not clean I recommend you buy the Haynes for your DeVille. See page 3-4, illustration 3.14.

Joe

i would get a radiator tester to make sure there is no air leaking out at a slow rate

FOR THE 4.6L ENGINE THE THERMOSTAT HOUSING LOCATION IS NEAR THE WATER PUMP DRIVE BELT ON TO COOLANT CROSSOVER HOUSING.

looked it up online and looks like it's on the front of the water pump in a thing called the coolant inlet housing. one end of it looks something like the letter y and the other end, where the thermostat is round. hope that helps

drain half of the coolant.follow top hose to the thermmostat housing .loosen hose clamp then loosen the thermostat bolts.remove the thermostat housing and thermostat.remove traces of all the old gasket from housing and the intake where thermostat goes.becareful dont scratch the surfaces while removing all the old gasket.this info is for the 4.9 models.now for the 4.6 engines. you have to remove radiator support cover .remove the air filter housing.loosen hose clamps .remove your thermostat housing bolts then thermostat.remove traces of all old gasket.on thermostat housing and intake. then put in new thermostat in. put on housing .torque bolts 18 to 20 ft lbs.

did you try replacing the radiator cap and the temp sensor?