Honda CIVIC 10G 2016 Engine Cooling System Page 1

Cooling Fan Controls System Description
Overview
The PCM receives various signals from sensors (such as coolant temperature signals and refrigerant compression signals) and
controls the fan speed (HI/LO) as needed. By controlling the radiator fan and A/C condenser fan efficiently, the fuel efficiency is
improved by reducing the electrical load.
Fan LO Control Operation
In fan LO control, the PCM switches the FAN LO terminal to the ON position, which then switches the radiator fan relay to the ON
position. This causes current to flow from the 12 volt battery to the radiator fan relay, the radiator fan motor, the fan control relay and
the A/C condenser fan motor, to create a series connection through the radiator fan motor and the A/C condenser fan motor. Using
this series connection, the fan rotates at a lower speed.
Fan HI Control Operation
In fan HI control, the PCM powers the FAN LO terminal and the FAN HIGH terminal. This switches the radiator fan relay, the fan
control relay, and the A/C condenser fan relay to the ON position. With the radiator fan relay and the fan control relay in the ON
position, current from the 12 volt battery flows through the radiator fan relay to the radiator fan motor and then through the fan control
relay to the ground. This rotates the radiator fan at a high speed.
In addition, with the A/C condenser fan relay and the fan control relay in the ON position, current from the 12 volt battery flows through
the A/C condenser fan relay to the A/C condenser fan motor to the ground. This rotates the A/C condenser fan at a high speed.
Cooling Fan Controls System Description 8917 http://techinfo.honda.com/rjanisis/pubs/sm/1/2/Contents/enu/61TBAD/...
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Contents Summary of Engine Cooling System

  • Page 1Cooling Fan Controls System Description Overview The PCM receives various signals from sensors (such as coolant temperature signals and refrigerant compression signals) and controls the fan speed (HI/LO) as needed. By controlling the radiator fan and A/C condenser fan efficiently, the fuel efficienc
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  • Page 3Cooling System Component Location Index cardiagn.com
  • Page 4Cooling System Component Location Index cardiagn.com
  • Page 5Cooling System Component Location Index cardiagn.com
  • Page 6Charge Air Cooler Removal and Installation NOTE: Make sure the end of hose band (A) is aligned with the mark (B) on the hose band after the parts are installed. 1. Charge Air Cooler - Exploded View Exploded View cardiagn.com
  • Page 7NOTE: Refer to the Exploded View if needed during this procedure. cardiagn.com 1. Front Bumper - Remove 2. Charge Air Cooler - Remove 1. Remove the clips (A).
  • Page 82. Remove the brackets (A). 3. Remove intake air duct B and intake air duct C. 4. Remove the charge air cooler (D) and the lower cushions (E). cardiagn.com 3. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 9Charge Air Cooler Removal and Installation NOTE: Where icon is shown, click for further information. Do not remove all parts. Only remove the ones applicable to the procedure you are working on. Unless otherwise indicated, illustrations used in the procedure are for USA and Canada models. 1 cardiagn
  • Page 10Replace cardiagn.com
  • Page 111. Front Bumper - Remove 2. Charge Air Cooler - Remove 3. Hose Band - Precaution Note for installation Align the end of hose band (A) with the center of mark (B) on the hose band. cardiagn.com 4. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 12Climate Control System Component Location Index cardiagn.com Single Fan Type
  • Page 13cardiagn.com Dual Fan Type
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  • Page 16Coolant Check 1. Coolant - Check L15B7 engine (USA and Canada models): 1. Check the coolant level in the expansion tank. Make sure it is between the MAX mark (A) and MIN mark (B). 2. If the coolant level in the expansion tank is at or below the MIN mark, add coolant to bring it between the MIN and M
  • Page 17Coolant Check 1. Coolant - Check 1. Check the coolant level in the expansion tank. Make sure it is between the MAX mark (A) and MIN mark (B). 2. If the coolant level in the expansion tank is at or below the MIN mark, add coolant to bring it between the MIN and MAX marks, then inspect the cooling sys
  • Page 18Coolant Check 1. Coolant - Check 1. Check the coolant level in the expansion tank. Make sure it is between the MAX mark (A) and MIN mark (B). 2. If the coolant level in the expansion tank is at or below the MIN mark, add coolant to bring it between the MIN and MAX marks, then inspect the cooling sys
  • Page 19Coolant Replacement NOTE: How to read the torque specifications. Unless otherwise indicated, illustrations used in the procedure are for L15B7 engine (USA and Canada models). 1. Expansion Tank Cap - Remove 1. Wait until the engine is cool, then carefully remove the expansion tank cap (A). cardiagn.c
  • Page 201. Loosen the drain plug (A), and drain the coolant. 4. Cylinder Block Coolant - Drain cardiagn.com 1. Remove the drain bolt (A). 2. After the coolant has drained, reinstall the drain bolt with a new washer (B). 3. Tighten the radiator drain plug securely. 5. Intake Air Resonator - Install 6. Expans
  • Page 21If the vehicle is regularly used in very low temperatures (under -22 °F (-30 °C)), a 60% concentration of coolant should be used. Add Amount of Honda Vehicle Usage Then add Honda Long Current Extreme Cold Weather Operation (Desired Coolant Drain Life Antifreeze/Coolant Mixture Antifreeze/Coolant Typ
  • Page 22L15B7 engine (Mexico models)/L15BA engine/L15BY engine: 8. Engine Coolant - Air Bleed cardiagn.com 1. Loosely install the expansion tank cap. 2. Start the engine and let it run until the cooling fan comes on at least twice. Do not operate the air conditioning system. 3. Turn off the engine. Check th
  • Page 231. If the Maintenance Minder required to replace the engine coolant, reset the Maintenance Minder with the gauge (see "Resetting the Maintenance Minder"). If the Maintenance Minder did not require to replace the engine coolant, reset the Maintenance Minder with the HDS (see "Resetting the Individual
  • Page 24Coolant Replacement NOTE: How to read the torque specifications. 1. Expansion Tank Cap - Remove 2. Engine Undercover Plate - Remove cardiagn.com 3. Engine Coolant - Drain 1. Loosen the drain plug (A), and drain the coolant. 2. After the coolant has drained, tighten the radiator drain plug securely.
  • Page 254. Expansion Tank Coolant - Drain 5. Engine Coolant - Refill 1. Pour Honda Long Life Antifreeze/Coolant Type 2 into the expansion tank (A) to the MAX mark (B). NOTE: Always use Honda Long Life Antifreeze/Coolant Type 2 or Honda Extreme Cold Weather Antifreeze/Coolant Type 2. Using a non-Honda coolan
  • Page 26cardiagn.com 6. Engine Coolant - Air Bleed 1. Loosely install the expansion tank cap. 2. Start the engine and let it run until the radiator fan comes on at least twice. Do not operate the air conditioning system. 3. Turn off the engine. Check the level in the expansion tank, and add Honda Long Life
  • Page 271. If the Maintenance Minder required to replace the engine coolant, reset the Maintenance Minder with the gauge (see "Resetting the Maintenance Minder"). If the Maintenance Minder did not require to replace the engine coolant, reset the Maintenance Minder with the HDS (see "Resetting the Individual
  • Page 28Coolant Replacement 1. Expansion Tank Cap - Remove cardiagn.com 2. Engine Undercover Lid - Remove 3. Engine Coolant - Drain 1. Loosen the drain plug (A), and drain the coolant. 2. After the coolant has drained, tighten the radiator drain plug securely. 4. Engine Coolant - Refill 1. Pour Honda Long L
  • Page 29Always use Honda Long Life Antifreeze/Coolant Type 2 or Honda Extreme Cold Weather Antifreeze/Coolant Type 2. Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail. Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water
  • Page 301. Loosely install the expansion tank cap. 2. Start the engine and let it run until the radiator fan comes on at least twice. Do not operate the air conditioning system. 3. Turn off the engine. Check the level in the expansion tank, and add Honda Long Life Antifreeze/Coolant Type 2, if needed. 6. En
  • Page 31Cooling Fan Controls Circuit Diagram cardiagn.com
  • Page 32Cooling Fan Controls Circuit Diagram cardiagn.com
  • Page 33Cooling Fan Controls Circuit Diagram cardiagn.com
  • Page 34Cooling Fan Controls Component Location Index cardiagn.com
  • Page 35Cooling Fan Controls Component Location Index cardiagn.com
  • Page 36Cooling Fan Controls Component Location Index cardiagn.com
  • Page 37Cooling Fan Controls Symptom Troubleshooting Index NOTE: Do an all DTC check with the HDS, and troubleshoot any DTCs first before following the repair procedures listed in the index. Symptom Diagnostic Procedure Also check for Engine overheats 1. Check the coolant level. Check the RFC unit is operat
  • Page 38Cooling Fan Controls Symptom Troubleshooting Index Symptom Diagnostic Procedure Also check for Engine overheats 1. Check the coolant level. Check the radiator and A/C condenser 2. Check for any engine coolant leakage fans are operating (from gaskets, hoses, O-rings, etc.). properly 3. Check for dirt
  • Page 39Cooling Fan Controls System Description - Overview Overview Cooling Fan Control The PCM decides the optimal fan drive depending on the signals from various sensors, and outputs duty signals to control the cooling fan motor. By performing a sensitive drive control depending on the situation, it effic
  • Page 40Power Relay Test Special Tool Required Image Description/Tool Number Relay Puller 07AAC-000A2A1 or 07AAC-000A1A0 cardiagn.com Relay Socket Extension (5 Pin) 07AGK-000A2A0 Relay Socket Extension (4 Pin) 07AGK-000A1A0 1. Power Relay - Test
  • Page 41Use this chart to identify the types of the relay, then do the test listed for it. Relay Test A/C compressor clutch relay Normally-open four-terminal Blower motor relay type Daytime running light relay Fog light relay (with fog light) Front accessory power socket relay Headlight low beam relay Horn
  • Page 42Five-Terminal Type Check for continuity between the terminals: cardiagn.com There should be continuity between terminals No. 1 and No. 2 when 12 volt battery power is connected to terminal No. 3, and 12 volt battery ground is connected to terminal No. 5. There should be continuity between terminals
  • Page 43Power Relay Test Special Tool Required Image Description/Tool Number Relay Puller 07AAC-000A2A1 or 07AAC-000A1A0 cardiagn.com Relay Socket Extension (5 Pin) 07AGK-000A2A0 Relay Socket Extension (4 Pin) 07AGK-000A1A0 1. Power Relay - Test
  • Page 44Use this chart to identify the types of the relay, then do the test listed for it. Relay Test A/C compressor clutch relay Normally-open four-terminal A/C condenser fan relay (Type-R) type Blower motor relay Daytime running light relay Fog light relay (with fog light) Front accessory power socket rel
  • Page 45Five-Terminal Type Check for continuity between the terminals: cardiagn.com There should be continuity between terminals No. 1 and No. 2 when 12 volt battery power is connected to terminal No. 3, and ground is connected to terminal No. 5. There should be continuity between terminals No. 1 and No. 4
  • Page 46Expansion Tank Cap Test 1. Expansion Tank Cap - Test 1. Wait until the engine is cool, then carefully remove the expansion tank cap (A). Wet the expansion tank cap seal with engine coolant, then install it on a commercially available pressure tester (B). 2. Apply a pressure of 93-123 kPa (0.95-1.25
  • Page 47Expansion Tank Cap Test 1. Expansion Tank Cap - Test 1. Wait until the engine is cool, then carefully remove the expansion tank cap (A). Wet the expansion tank cap seal with engine coolant, then install it on a commercially available pressure tester (B). 2. Apply a pressure of 112-146 kPa (1.14-1.49
  • Page 48Expansion Tank Cap Test 1. Expansion Tank Cap - Test 1. Wait until the engine is cool, then carefully remove the expansion tank cap (A). Wet the expansion tank cap seal with engine coolant, then install it on a commercially available pressure tester (B). 2. Apply a pressure of Apply a pressure of 93
  • Page 49Expansion Tank Removal and Installation NOTE: How to read the torque specifications. Unless otherwise indicated, illustrations used in the procedure are for L15B7 engine (USA and Canada models). 1. Engine Coolant - Drain 2. Expansion Tank - Remove 1. Disconnect the water bypass hoses (A). 2. Remove
  • Page 50Expansion Tank Removal and Installation 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) 1. Engine Coolant - Drain 2. Expansion Tank - Remove 3. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
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  • Page 52Expansion Tank Removal and Installation 1. Engine Coolant - Drain 2. Expansion Tank and Bracket - Remove 1. Disconnect the water bypass hoses (A). 2. Remove the expansion tank (B). cardiagn.com 3. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 53Expansion Tank Test 1. Expansion Tank - Test 1. Wait until the engine is cool, then carefully remove the expansion tank cap, and fill the expansion tank with engine coolant to the base of the filler neck. 2. Attach a commercially available pressure tester (A) to the expansion tank, and apply a press
  • Page 54Expansion Tank Test 1. Expansion Tank - Test 1. Wait until the engine is cool, then carefully remove the expansion tank cap, and fill the expansion tank with engine coolant to the base of the filler neck. 2. Attach a commercially available pressure tester (A) to the expansion tank, and apply a press
  • Page 55Expansion Tank Test 1. Expansion Tank - Test 1. Wait until the engine is cool, then carefully remove the expansion tank cap, and fill the expansion tank with engine coolant to the base of the filler neck. 2. Attach a commercially available pressure tester (A) to the expansion tank, and apply a press
  • Page 56Radiator Fan High Speed Circuit Troubleshooting cardiagn.com
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  • Page 58Radiator Fan High Speed Circuit Troubleshooting 1. Fuse check: ‐1. Check the following fuses. Fuse Location No. A1-3 (30 A) Under-hood fuse/relay box No. A11 (5 A) No. B9 (10 A) Under-dash fuse/relay box Are the fuses OK? YES Reinstall the fuses, then go to step 2. NO Replace the fuse(s), and rechec
  • Page 59‐2. Connect terminals A and B with a jumper wire. Terminal A Fan control relay 5P socket No. 1 (female terminals): Terminal B Fan control relay 5P socket No. 2 (female terminals): ‐3. Connect terminals A and B with a jumper wire. Terminal A Radiator fan relay 4P socket No. 3 (female terminals): Term
  • Page 60Is there continuity? YES Go to step 7. NO Repair an open in the GND wire between the fan control relay and ground G305.■ 7. Open wire check (MAIN FAN MOTOR line): ‐1. Disconnect the flowing connector. Radiator fan motor 2P connector ‐2. Check for continuity between test points 1 and 2. cardiagn.com
  • Page 61Radiator fan motor 2P connector: disconnected Test point 1 Fan control relay 5P socket No. 1 (female terminals): Test point 2 Radiator fan motor 2P connector No. 2 (female terminals): Is there continuity? cardiagn.com YES Check for poor connections or loose terminals at the under-hood fuse/relay box
  • Page 62‐2. Connect the HDS to the DLC. ‐3. Turn the vehicle to the OFF (LOCK) mode. ‐4. Jump the SCS line with the HDS, and wait more than 1 minute. NOTE: This step must be done to protect the PCM from damage. ‐5. Disconnect the following connector. PCM connector No.2 (58P) ‐6. Check for continuity between
  • Page 63YES Go to step 12. NO Repair an open in the IGPS (LAF) wire between the fan control relay and the No. A11 (5 A) fuse.■ 12. Open wire check (FAN HI SIGNAL line): ‐1. Check for continuity between test points 1 and 2. Test condition Vehicle OFF (LOCK) mode Radiator fan relay: disconnected Fan control r
  • Page 64Radiator Removal and Installation 1. Intake Air Resonator - Remove 2. Engine Coolant - Drain 3. Front Grille Cover - Remove 4. Front Bumper - Remove 5. ECT Sensor 2 - Remove cardiagn.com 6. Front Bumper Upper Beam - Remove 7. Bulkhead - Move 8. Radiator Assembly - Remove 1. Disconnect the upper radi
  • Page 65cardiagn.com 2. Disconnect the connector (D). 3. Remove the harness clamps (E) and the expansion tank outlet pipe (F).
  • Page 664. Remove the A/C condenser mounting bolts (A). cardiagn.com 5. Pull up the radiator assembly (A). 6. Remove the fan shroud assembly (B) and the lower cushions (C). 9. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 67Radiator Removal and Installation 1 cardiagn.com Replace 1. Engine Coolant - Drain
  • Page 682. A/C Condenser Fan Shroud Assembly and Radiator Fan Shroud Assembly - Remove cardiagn.com
  • Page 693. A/C Condenser Mounting Bolt - Remove 4. Radiator - Remove 5. Lower Cushion - Remove 6. Drain Plug - Remove 7. ECT Sensor 2 - Remove (if necessary) cardiagn.com 8. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 70Radiator Removal and Installation 1. Engine Undercover Lid - Remove 2. Engine Undercover - Remove 3. Engine Coolant - Drain 4. ECT Sensor 2 - Remove 5. Bulkhead - Move cardiagn.com 6. Radiator Assembly - Remove 1. Disconnect the upper radiator hose (A), the lower radiator hose (B), and the water hos
  • Page 71cardiagn.com 2. Disconnect the connectors (D). 3. Remove the harness clamps (E) and the expansion tank outlet pipe (F).
  • Page 724. Remove the A/C condenser bolts (A). cardiagn.com 5. Pull up the radiator assembly (A). 6. Remove the fan shroud assembly (B), and the lower cushions (C). 7. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
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  • Page 74Thermostat Housing Removal and Installation NOTE: How to read the torque specifications. 1. Engine Coolant - Drain 2. Air Cleaner - Remove 3. ECT Sensor 1 - Remove cardiagn.com 4. Thermostat - Remove 5. Purge Tube Bracket - Remove (USA and Canada models) 1. Disconnect purge tube D. 2. Remove the pur
  • Page 751. Disconnect the upper radiator hose (A), the water bypass hoses (B), and the heater hoses (C). 8. Thermostat Housing and Connecting Pipe - Remove cardiagn.com 1. Remove the thermostat housing (A).
  • Page 76cardiagn.com 2. M/T: If necessary, remove the sealing bolt (B). 3. Disconnect the water outlet hose (C). 4. Remove the connecting pipe (D). 9. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 77Thermostat Housing Removal and Installation 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 1. Engine Coolant - Drain 2. Air Cleaner - Remove 3. 12 Volt Battery Base - Remove
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  • Page 794. Charge Air Cooler Pipe - Remove NOTE: Remove the necessary part(s). Note for installation Make sure to review the hose band precautions before installing the charge air cooler pipe(s). 5. Vacuum Pump Holder - Remove 6. ECT Sensor 1 - Remove 7. Thermostat - Remove cardiagn.com 8. Heater Hose - Dis
  • Page 80Thermostat Housing Removal and Installation 1. Engine Coolant - Drain 2. Air Cleaner - Remove 3. ECT Sensor 1 - Remove 4. Thermostat - Remove cardiagn.com 5. Upper Radiator Hose, Water Bypass Hose, and Heater Hose - Disconnect 6. Thermostat Housing and Connecting Pipe - Remove NOTE: If necessary, re
  • Page 817. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 82Thermostat Removal, Installation, and Test NOTE: How to read the torque specifications. 1. Engine Coolant - Drain 2. Air Cleaner - Remove 3. Intake Air Duct E - Remove 1. Disconnect the connectors (A). cardiagn.com 2. Remove the harness clamps (B). 3. USA and Canada models: Disconnect purge tube D.
  • Page 831. CVT: Remove the harness clamp (A). 2. Remove the thermostat cover (B). 3. Remove the thermostat (C). NOTE: Be sure to install the thermostat in the direction shown. cardiagn.com 5. All Removed Parts - Install 1. Install the parts in the reverse order of removal. NOTE: Replace the thermostat if it
  • Page 84Thermostat Removal, Installation, and Test 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace *1 These parts have inspection items. 1. Engine Coolant - Drain 2. Air Cleaner - Remove
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  • Page 863. Thermostat - Remove 4. All Removed Parts - Install 1. Install the parts in the reverse order of removal. NOTE: Replace the thermostat if it is stuck in the open position at room temperature. 1. Thermostat - Test To test a closed thermostat: cardiagn.com 1. Suspend the thermostat (A) in a containe
  • Page 87Thermostat Removal, Installation, and Test 1. Air Cleaner - Remove 2. Engine Coolant - Drain 3. Thermostat - Remove 1. Disconnect the lower radiator hose (A). 2. Remove the thermostat (B). cardiagn.com 4. All Removed Parts - Install 1. Install the parts in the reverse order of removal. NOTE: Replace
  • Page 88To test a closed thermostat: 1. Suspend the thermostat (A) in a container of water. Do not let the thermostat and the thermometer (B) touch the bottom of the hot container. 2. Heat the water, and check the temperature with a thermometer. Check the temperature when the thermostat first opens, and whe
  • Page 89Water Passage Removal and Installation 1. Water Pump - Remove 2. Thermostat Housing and Connecting Pipe - Remove 3. Oil Pressure Switch - Remove 4. Water Passage - Remove cardiagn.com 5. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 90Water Passage Removal and Installation 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 1. Turbocharger - Remove 2. Water Pump - Remove 3. Thermostat Housing and Connecting Pipe - Remove
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  • Page 924. Turbocharger Bypass Control Valve Solenoid Pipe B - Remove 5. Water Passage - Remove 6. Oil Cooler - Remove 7. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 93Water Passage Removal and Installation 1. Water Pump - Remove 2. A/C Compressor - Move NOTE: Do not disconnect the suction hose and the discharge hose. Do not bend the suction hose and the discharge hose excessively. Hang the A/C compressor with a wire tie. 3. Thermostat Housing and Connecting Pipe
  • Page 94Water Pump Inspection 1. Drive Belt - Remove 2. Water Pump - Inspect 1. Turn the water pump pulley clockwise, and check that it turns freely and smoothly. If it does not turn smoothly, replace the water pump. NOTE: When you check the water pump, you may see a small amount of "weeping" from the bleed
  • Page 95Water Pump Inspection 1. Drive Belt - Remove 2. Water Pump - Inspect 1. Turn the water pump pulley counterclockwise, and check that it turns freely and smoothly. If it does not turn smoothly, replace the water pump. NOTE: When you check the water pump, you may see a small amount of "weeping" from th
  • Page 96Water Pump Inspection 1. Drive Belt - Remove 2. Water Pump - Inspect 1. Turn the water pump pulley counterclockwise, and check that it turns freely and smoothly. If it does not turn smoothly, replace the water pump. NOTE: When you check the water pump, you may see a small amount of "weeping" from th
  • Page 97Water Pump Removal and Installation 1. Engine Coolant - Drain 2. Drive Belt - Remove 3. Drive Belt Auto-Tensioner - Remove 4. Turbocharger - Remove 5. Water Pump - Remove cardiagn.com 1. Move the harness holder (A).
  • Page 982. Remove the water pump (A). 6. All Removed Parts - Install cardiagn.com 1. Install the parts in the reverse order of removal. NOTE: Inspect and clean the O-ring groove and the mating surface of the water passage.
  • Page 99Water Pump Removal and Installation NOTE: When installing the water pump, inspect and clean the O-ring groove and the mating surface of the water passage. 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 1. Engine Coolant - Drain
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  • Page 1012. Drive Belt Auto-Tensioner - Remove 3. Water Pump - Remove 4. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 102Water Pump Removal and Installation 1. Engine Coolant - Drain 2. Alternator - Remove 3. Water Pump - Remove cardiagn.com 4. All Removed Parts - Install 1. Install the parts in the reverse order of removal. NOTE: Inspect and clean the O-ring groove and the mating surface of the water passage.