SEAL 4448991 - Caterpillar

2. Loosen clamp (1). Remove four bolts (2) and washers. Remove pipe (3). 3. Remove water temperature regulator (4). Remove gasket (5). The following steps are for the installation of the water temperature regulator.
If the water temperature regulator is installed wrong, it will cause the engine to overheat.
4. Put water temperature regulator (4) in position in the cylinder head as shown.5. Inspect gasket (5) for damage and make a replacement if necessary.6. Put pipe (3) in position with the plug toward the front of the engine.7. Install bolts (2) and the washers.8. Slide the hose in position and tighten clamp (1).9. Fill the cooling system with coolant to the correct level. See the Operation & Maintenance Manual.