- Drain the antifreeze/coolant in a clean container by opening the valve located at the bottom of the radiator, you may reuse the coolant if it is clean, otherwise, this is the perfect opportunity to add new antifreeze, remember to keep the mix 50/50 ( 50% water, 50% antifreeze).
- Once you have drained the coolant out, proceed to remove the upper radiator hose by loosening the hose clamp, once the hose clamp is loose, pull the hose out of the water outlet.
- With the upper radiator hose removed, remove the two bolts that secure the water outlet to the cylinder head, and remove it from the vehicle, you may have to tap the water outlet housing gently with a rubber mallet it it is stuck to the cylinder head.
- Once the water outlet is removed, proceed to remove the thermostat by pulling it away from the head.
- Next proceed to remove the old gasket material from both, the water outlet and the cylinder head, a scraper works the best, once you have most of it off, use either a wire brush to remove the fine pieces remaining or fine grit sand paper, make sure that you don't over do this or you will damage the housing causing the water outlet not to seal and develop a water leak
- After you have cleaned both surfaces and are free of old gasket material, proceed to install the thermostat in the cylinder head, follow by the thermostat gasket, the gasket you see in the picture has a self adhesive side, this made the installation so much easier, because the gasket will keep the thermostat in place as we get ready to install the water outlet.
NOTE: IF you feel that the surface of either the water outlet or the cylinder head is either corroded or slightly damaged, use a slight coat of RTV silicone on both ends to ensure proper seal, otherwise, you will end up with a leak.
To finish this process, install the items back in the reverse order you took them off, next proceed to add the antifreeze mix to the radiator, start the car and allow it to run as you watch the temperature gauge, to allow the air trapped in the system, leave the radiator cap slightly opened so the pressure doesn't get to high due to the air in the system.
Also, keep a close eye in the temperature gauge, if you see the temperature rise above normal, stop the engine, and let it settle for a couple minutes, to see if the thermostat opens, if it still doesn't, allow it to cool down and start the engine again, this time raise the RPM around 2000 to 2500, this will allow the water pump to circulate the coolant inside the engine faster, that way if the level is low in the engine, it will splash enough on the thermostat causing it to open.
Under no circumstances allow your engine to go over 3/4 of the temperature travel, if the thermostat hasn't opened you need to stop the engine, allow it to cool down for a few minutes, check the coolant level and do it again till the thermostat opens.