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First step is drain the cooling system. Follow the upper radiator hose to the thermostat housing. Remove the clamp from the hose and remove the hose from the housing. You have two bolts holding the thermostat housing onto the block, remove both bolts. The upper bolt can be taken out with a ratchet (13mm) but the lower on is going to give you problems. You will need to remove it with a combination 13mm wrench. Because this area is so hard to get at it will take some time to remove but you can get it out. Once both bolts have been removed you can pull off the thermostat housing. You will notice that the housing has one hole for the upper bolt and a slot for the lower bolt. This is what is going to save you a lot of pain later on. Here's the trick to putting it together. Don't use the same bolt on the lower block. Get a bolt that is at least a quarter inch longer. The length isn't going to matter because the bolt goes all the way through the mount. You will now hand thread the lower bolt a couple of turns to hold it into the housing. Put a little grease on the rubber seal to keep the thermostat from falling out of the housing and install the new thermostat. Because the lower bolt goes into a slot and because it is longer then the original bolt you can actually work the thermostat housing against the exhaust heat shield and over the thermostat that is sticking out of the housing and slid the slot onto the lower bolt. Then tighten the bolts down. This will take some time but it will save you a chunk of change. You now owe me a beer.
What else can I help you with?
How do you replace a thermostat in a 2004 Buick Le Saber?
remove the thermostat housing
Where is the thermostat for a 2004 Buick Century 2004?
The thermostat for a 2004 Buick Century is located in the engine compartment, specifically on the engine's intake manifold. To access it, you'll need to remove the upper radiator hose that connects to the thermostat housing. The thermostat itself is housed within the thermostat housing, which is usually secured by a couple of bolts. Ensure the engine is cool before attempting to access or replace the thermostat to avoid burns or injury.
How do you replace thermostat on 2004 cavalier?
how do you replace thermostat for 2004 cavalier
How do you replace the thermostat in a 2004 1.8T Jetta?
How do I replace the thermostat in a 2004 1.8T jetta?
How do you replace a 2004 Buick rendezvous speed sensor?
how do you replace a 2004 buick rendezvous input speed sensor
How do you replace a starter in a 2004 Buick rendezvous?
how to remove starter on 2004 Buick Rendezvous
How do I replace a rear turn signal bulb on my 2004 Buick Century?
Need more information, is it a front or rear, side marker even?
How do you replace a rear blinker bulb on a 2004 Buick?
It would depend on what model of Buick you are referring to.
What does the error coder po128 mod10 mean for a 2004 Buick rainier?
The error code P0128 for a 2004 Buick Rainier typically indicates an issue with the engine coolant temperature being below the thermostat regulating temperature. This could be caused by a faulty thermostat, low coolant level, or a problem with the engine coolant temperature sensor. It is recommended to have the vehicle inspected by a mechanic to diagnose and address the underlying issue.
How many blend door actuators does a 2004 buick century have?
two
Do you have to take alternator off to replace thermostat in 2004 envoy?
of corse
How do you replace water pump in a 2004 Buick century?
To replace the water pump in a 2004 Buick Century, start by disconnecting the battery and draining the coolant from the radiator. Remove the serpentine belt and any components obstructing access to the water pump, such as the alternator or engine cover. Once exposed, unbolt the water pump, clean the gasket surface, and install the new pump with a new gasket. Reassemble everything, refill the coolant, and reconnect the battery.
