Engine Cooling System: Other Infiniti FX45 I

PRECAUTIONS FOR SUPPLEMENTAL RESTRAINT SYSTEM (SRS) "AIR BAG" AND "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in AIR BAG RESTRAINT SYSTEMS .

SPECIAL SERVICE TOOLS

The actual shapes of Kent-Moore tools may vary from those of special service tools illustrated here.

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1. Check if reservoir tank engine coolant level is within "MIN" to "MAX" when engine is cool.
2. Adjust the engine coolant level as necessary.

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1. To check for leaks, apply pressure to the cooling system with radiator cap tester (commercial service tool) and radiator cap tester adapter (SST). Testing pressure : 157 kPa (1.6 kg/cm 2 , 23 psi) WARNING: Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from thermostat housing. CAUTION: Higher testing pressure than specified may cause radiator damage. NOTE: In a case engine coolant decreases, replenish radiator with engine coolant.
2. If anything is found, repair or replace damaged parts.

CHANGING ENGINE COOLANT

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1. Remove engine front undercover with power tool.
2. Open radiator drain plug at the bottom of radiator, and then remove radiator cap. Be careful not to allow engine coolant to contact drive belts. When draining all of engine coolant in the system, open water drain plugs on engine cylinder block. Refer to «DISASSEMBLY»(ref-158963-S31730672162005020300000) .
3. Check drained engine coolant for contaminants such as rust, corrosion or discoloration. If contaminated, flush the engine cooling system. Refer to «Flushing Cooling System»(ref-172394-S41451292572005022800000) .
4. Remove reservoir tank, drain engine coolant and clean reservoir tank before installing.

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1. Install reservoir tank, and radiator drain plug. CAUTION: Be sure to clean radiator drain plug and install with new O-ring. Radiator drain plug: : 1.19 N.m (0.12 kg-m, 11 in-lb) If cylinder block water drain plugs are removed, close and tighten them. Refer to «ASSEMBLY»(ref-158963-S21089060012005020300000) .
2. Remove air relief plug on heater hose.
3. Fill thermostat housing and reservoir tank to specified level. Refill engine coolant up to filler neck of thermostat housing. Pour engine coolant through engine coolant filler neck slowly of less than 2 l (2-1/8 US qt, 1-3/4 Imp qt) a minute to allow air in system to escape. Use Genuine Nissan long Life Antifreeze/Coolant or equivalent mixed with water (distilled or demineralized). Refer to RECOMMENDED FLUIDS AND LUBRICANTS . Engine coolant capacity (With reservoir tank at "MAX" level): Approx. 10.0 l (10-5/8 US qt, 8-3/4 Imp qt) Reservoir tank engine coolant capacity (at "MAX" level): 0.8 l (7/8 US qt, 3/4 Imp qt) When engine coolant overflows air relief hole on heater hose, install air relief plug.
4. Warm up engine to normal operating temperature with radiator cap installed.
5. Run engine at 3,000 RPM for 10 seconds and return to idle speed. Repeat two or three times. CAUTION: Watch water temperature gauge so as not to overheat engine.
6. Stop engine and cool down to less than approximately 50°C (122°F). Cool down using a fan to reduce the time. If necessary, refill engine coolant up to filler neck of thermostat housing.
7. Refill reservoir tank to "MAX" level line with engine coolant.
8. Repeat steps 3 - 6 two or more times with radiator cap installed until engine coolant level no longer drops.
9. Check cooling system for leaks with engine running.
10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000 RPM with heater temperature controller set at several position between "COOL" and "WARM". Sound may be noticeable at heater unit.
11. Repeat step 10 three times.
12. If sound is heard, bleed air from cooling system by repeating steps 3 - 6 until engine coolant level no longer drops. Clean excess engine coolant from engine.

CHECKING RADIATOR CAP

CHECKING RADIATOR CAP

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1. Pull negative-pressure valve to open it and make sure that it closes completely when released. Make sure that there is no dirt or damage on the valve seat of radiator cap negative-pressure valve. Make sure that there are no unusualness in the opening and closing conditions of negative-pressure valve.
2. Check radiator cap relief pressure. Standard: 78 - 98 kPa (0.8 - 1.0 kg/cm 2 , 11 - 14 psi) Limit: 59 kPa (0.6 kg/cm 2 ,9 psi) When connecting radiator cap to radiator cap tester (commercial service tool) and radiator cap tester adapter [SST], apply engine coolant to the cap seal surface. Replace radiator cap if there is an unusualness in negative-pressure valve, or if the relief pressure exceed the limit.

CHECKING RADIATOR

Check radiator for mud or clogging. If necessary, clean radiator as follows

1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surface once per minute.
3. Stop washing if any stains no longer flow out from radiator.
4. Blow air into the back side of radiator core vertically downward. Use compressed air lower than 490 kPa (5 kg/cm 2 , 71 psi) and keep distance more than 30 cm (11.8 in).
5. Blow air again into all the radiator core surfaces once per minute until no water sprays out.

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1. Attach spacer to tip of radiator plate pliers (SST). Spacer specification: 1.5 mm (0.059 in) thick * 18 mm (0.71 in) wide * 8.5 mm (0.335 in) long.
2. Make sure that when radiator plate pliers [SST: KV99103510 ( - )] are closed dimension H" is approx. 7.6 mm (0.299in).
3. Adjust dimension H" with spacer, if necessary.

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1. Remove upper and lower tanks with radiator plate pliers B (SST). Grip the crimped edge and bend it upwards so that radiator plate pliers B [SST: KV99103520 ( - )] slips off. CAUTION: Do not bend excessively. In areas where radiator plate pliers B cannot be used, use flat-blade screwdriver to bend the edge up. CAUTION: Be careful not to damage tank.
2. Remove sealing rubber.
3. Make sure the edge stands straight up.
4. Remove A/T fluid cooler from tank.

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1. Install A/T fluid cooler. CAUTION: Pay attention to direction of conical washer.
2. Clean contact portion of tank.
3. Install sealing rubber while pushing it with fingers. CAUTION: Be careful not to twist sealing rubber.
4. Caulk tank in numerical order as shown in the figure with radiator plate pliers (SST). Use pliers in the locations where radiator plate pliers cannot be used.
5. Make sure that the rim is completely crimped down. Standard height "H" : 8.0 - 8.4 mm (0.315 - 0.331 in)
6. Make sure that there is no leakage. Refer to «Inspection»(ref-172394-S12285255812005022800000) .

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1. Apply pressure with radiator cap tester adapter (SST) and radiator cap tester (commercial service tool). provide used radiator and connect it to tested radiator using radiator hoses as shown in the figure. NOTE: The used radiator should be tested beforehand to confirm it has no leakage. If used one is not available, it is possible to use new service part as a radiator testing tool. Testing pressure : 157 kPa (1.6 kg/cm 2 , 23 psi) WARNING: To prevent the risk of hose coming undone while under pressure, securely fasten it down with hose clamp. CAUTION: Attach hose to A/T fluid cooler to seal its inlet and outlet.
2. Check for leakage by soaking radiator in water container with the testing pressure applied.

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Fan Coupling

Inspect fan coupling for oil leakage and bimetal conditions.

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1. If anything is found, replace fan coupling.

Cooling Fan

Inspect cooling fan for crack or unusual bend.

1. If anything is found, replace cooling fan.

Inspect cooling fan for crack or unusual bend.

1. If anything is found, replace cooling fan.

Water Outlet Pipe and Heater Pipe

First apply a neutral detergent to O-rings, then quickly inset the insertion parts of the water outlet pipe and heater pipe into the installation holes.