I had to remove the air intake to get to it.Easy then.
place your hand on the top radiater hose fallow it to the engine, remove the hose. the fiting that hose was on is the thermostat housing remove it and and then the thermostat. note how it looks as you remove it replace it with new one exactly the same way.
To replace the thermostat on a 1999 Chevrolet Lumina, first, ensure the engine is cool and disconnect the battery. Drain the coolant from the radiator, then remove the upper radiator hose connected to the thermostat housing. Unbolt the thermostat housing to access the thermostat, replace it with a new one, and reassemble by reversing the steps. Finally, refill the coolant and check for leaks.
Its located under the throttle body or follow the upper radiator hose til it hits a semi round housing. There is 2 bolts to remove it. First you have to drain the radiator fluid of course. I am changing the thermostat right now on my 2001 Chevy lumina and I see I will have to also remove the throttle body to get to the thermostat housing
Remove the water supply hose from the top of the thermostat housing. Remove the thermostat housing retaining bolts. The old thermostat will simply lift out. Reverse the process to install the new thermostat.
To install a thermostat in a 1999 Chevrolet Lumina, first, ensure the engine is cool and disconnect the negative battery cable. Remove the upper radiator hose from the thermostat housing and then unbolt the housing to access the thermostat. Replace the old thermostat with the new one, making sure to align it correctly, and apply a new gasket or sealant as needed. Reassemble the housing, reconnect the hose, and refill the cooling system before testing the engine.
Follow the upper radiator hose from the radiator to the engine. It will lead you to the thermostat housing. Drain coolant from radiator, remove upper radiator hose from engine, remove the two bolts holding the thermostat housing to engine, remove housing, remove thermostat.
Follow the top radiator hose from the radiator to the engine. The housing it is clamped to has a small bell with 2 bolts where it is bolted to the engine. Remove the hose clamp and the 2 bolts. You will find it inside that part.
It is at the engine end of the top radiator hose. Drain the radiator into a container and remove the hose at the thermostat housing. Remove the 2 bolts and remove the housing and the thermostat.
It varies from one engine to another but in most cases you drain a few qts of coolant from the radiator, remove the upper radiator hose from the thermostat housing on the engine side then remove the thermostat housing to gain access to the thermostat. Take note of how the thermostat is installed, the spring faces into the engine.
follow the top radiator hose to the engine. that is where your thermostat is. you will have to drain the radiator, remove the engine side of the hose and remove the thermostat housing to access it. remove thermostat clean mating surface of housing and engine, install thermostat, install housing, secure radiator hose, fill with coolant. start engine and check for leaks.
Yes, on a 1998 Chevrolet Lumina with a 3.1L engine, you typically need to remove the throttle body to access the horizontally mounted thermostat. This involves disconnecting various components and hoses connected to the throttle body before it can be removed. Make sure to follow a repair manual for detailed instructions and precautions to avoid damaging any parts.
This is not an easy one to do. If you have nibble fingers, patients and the right tools you can do it. Removing the air filter box off the throttle body and out of the engine compartment will give you a little needed elbow room. Drain down the radiator and remove upper radiator hose from thermostat housing. Remove the two bolts that hold the thermostat housing to the engine. One of the two bolts will be a challenge to get to but it can be done. With bolts removed you can wiggle out the thermostat housing to expose the thermostat. Install in reverse order.