Top positive review
Easy to Replace
Reviewed in the United States on February 24, 2019
Experience with the part:
The fact that this part is half made of plastic and is under constant pressure should make you feel uneasy. The reason that I needed to replace this housing was because the same type design was leaking from one of the screw housings. See below on what is not provided with this part. I don’t know how long this part will last! Replacement overall is an easy job to do, should take you between 1 to 3 hours to do. I broke the heater inlet pipe when removing it from the old housing and had to wait for one a few days. I also had to install twice because I didn’t replace the seals around the oil cooler pipe.
Get these in addition to this part:
1- ACDelco 25192905 GM Original Equipment Throttle Body Heater Inlet Pipe (you’ll most likely break the old one when detaching it from the housing)
2- Pipe seal and O-ring for oil cooler pipe (around $6 from dealer, it’s impossible to seal this pipe without)
3- Made for GM coolant
Here is a step by step how to replace:
1- Disconnect the battery (not just for safety, but to register this new part with the engine computer, if you don’t, radiator fan will keep running)
2- Drain the radiator, if you just remove the hoses, most of the coolant will run out anyways, but this is a good opportunity to flush your radiator clean by draining it from the bottom
3- Remove the heat shield on the engine by removing the 4 screws, pull the dipstick tube out, pull out the shield.
4- Remove the 2 electric connectors to the assembly
5- Remove the throttle body heater inlet pipe from the thermostat housing
6- Remove the 4 hoses from the thermostat housing by removing the clamps, and mark them if you need to
7- Unbolt the bracket connected to the housing
8- Remove the 4 screws on the right to detach the thermostat housing from the engine
9- Remove the thermostat housing with the oil cooler pipe connected
10- Remove the oil cooler pipe from the old housing replace the O-ring and the seal, connect to the new thermostat housing
11- Connect the thermostat housing.
12- Connect the dipstick tube, but not the heat shield, refill the coolant reservoir, and double check everything!
Turn the car on, put the car heater on high, add coolant if needed before the car gets hot, make sure the reservoir cap is fastened, let run for as long as it takes for the hearer to blow hot.
13- Check the thermostat housing and both ends of the oil cooler pipe for leaks.
14- If no leaks, congratulations, you’ve done a great job! Let the car cool off and put the heat shield back on. Continue to monitor the reservoir for the next few 200 or so miles.