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The filter housing will have either a shut off valve before and after the housing or a valve on top of the housing that turns (Black). Shutoffs before and after. 1. Turn both valves off 2. Push the "red button" on top of filter housing and hold to relieve the pressure off housing. 3. Unscrew housing to the left (lefty loosey, Righty tighty) You should have a housing wrench. 4. Remove filter, clean housing, lubricate the o-ring with silicone lubricant. 5. Replace filter, Screw housing back on (Hand tighten only) 6. Open inlet valve (slightly) while holding down the "red button" to relieve air in housing. 7. Open inlet and outlet valves and you are back in business.
PS if the housing is very difficult to remove. 1. Shut off inlet valve 2. Open the nearest cold water faucet and let it run until no water 3. Shut off outlet and repeat procedure as above Good Luck, RJ 5.
Inside the housing is a replaceable filter cartridge. Filters used for this type whole house filter housing come in micron ratings from 5 micron - 50 micron. The smaller micron the finer it filters (that is not always good because it can significantly reduce flow rate and pressure in home). 30-50 micron filters are the most common used. The filter should be changed every 3 months minimum and sanitized with a a cap full bleach when reinstalling filter. Omni filter housings are notorious for the bypass leaking when turned and the bypass freezing up to where it won't turn. There are no manuals for this. You can find filters at most any hardware store or water treatment company. RJ
It Depends on which engine you have, this is how it goes for both. I use a little RTV with a new ring as well.
THERMOSTAT REPLACEMENT (4.2L ENGINE)
Removal Procedure 1. Remove the necessary coolant from the radiator. 2. Remove the generator. 3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing. 4. Remove the thermostat housing bolts. 5. Remove the thermostat housing from the engine block. 6. Clean all of the surfaces of the thermostat housing. 7. Clean the sealing surface of the engine block. Installation Procedure
1. Install the thermostat housing to the engine block. 2. Install the thermostat housing bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in). 3. Lubricate the inner diameter of the radiator hose with engine coolant. 4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp. 5. Install the generator. 6. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine. 7. Inspect all sealing surfaces for leaks after starting the engine.
THERMOSTAT REPLACEMENT (5.3L ENGINE)
1. Drain Radiator and remove the radiator outlet hose. 2. Remove the water pump inlet bolts. 3. Remove the water pump inlet and thermostat from the water pump.
Installation Procedure IMPORTANT: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
1. Install the thermostat and thermostat housing to the water pump. 2. Install the thermostat housing bolts.15 N.m 3. Install the radiator outlet hose. 4. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine. 5. Inspect all sealing surfaces for leaks after starting the engine.