Question about 1995 Cadillac DeVille
How do you get to the thermostat easily?
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.
Posted on Apr 14, 2009
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Posted on Jan 02, 2017
Assuming you have the Northstar engine....
The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems), the hose connects into the housing where you will also find the water pump.
Remove the hose from the housing,then remove the two bolts on the flange,the thermostat can then be pulled out.
Take note of the orientation of the thermostat as you remove it.
Don't forget the new gasket when you install your new stat.
Posted on Jan 13, 2010
The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.
Posted on Feb 27, 2010
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
Posted on May 30, 2009
The pressure they work within is usualy information on your radiator cap or owners hand book.Your thermostat should be a 180 degree but can vary The 180 is in reference to the heat required to open them so water can flow through and be kept at a more or less constant 180.There are other temp ranges for a wide variety of applications and 180 is the standard one for most vehiclesThe radiaor and water system is pressurised to lower the boiling point of the water The higher the pressure the lower the boiling point
Posted on Feb 15, 2009
Thermostat replacement is relatively easy for an experienced technician. However, it's harder than a 2 bolt change found on older classic cars.
It is located in a thermostat housing on the left side of the engine.
Look to see if you can do this one.
Posted on Jul 03, 2010
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