Engine Cooling System: Other Infiniti FX35 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 .

Scheme 27

1. After removing mounting bolts and nuts, separate the mating surface using a seal cutter (SST) and remove old liquid gasket sealing. CAUTION: Be careful not to damage the mating surfaces.
2. In areas where seal cutter (SST) is difficult to use, use a plastic hammer to lightly tap (1) seal cutter where liquid gasket is applied. Use a plastic hammer to slide seal cutter (2) by tapping on the side. CAUTION: If for some unavoidable reason a tool such as a flat-bladed screwdriver is used, be careful not to damage the mating surfaces.

Scheme 28

Scheme 29

Scheme 30

1. Using a scraper, remove old liquid gasket adhering to the liquid gasket application surface and the mating surface. Remove liquid gasket completely from the groove of the liquid gasket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating surface with white gasoline (lighting and heating use) to remove adhering moisture, grease and foreign materials.
3. Attach liquid gasket tube to tube presser [SST: WS39930000(-)]. Genuine RTV Silicone Sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .
4. Apply liquid gasket without breaks to the specified location with the specified dimensions. If there is a groove for the liquid gasket application, apply liquid gasket to the groove. As for the bolt holes, normally apply liquid gasket inside the holes. Occasionally, it should be applied outside the holes. Make sure to read the text of article . Within five minutes of liquid gasket application, install the mating component. If liquid gasket protrudes, wipe it off immediately. Do not retighten after mounting bolts and nuts the installation. After 30 minutes or more have passed from the installation, fill engine oil and engine coolant.

SPECIAL SERVICE TOOLS

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

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

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

Scheme 38

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 radiator. CAUTION: Higher test pressure than specified may cause radiator damage. NOTE: In a case that engine coolant decreases, replenish radiator with engine coolant.
2. If anything is found, repair or replace damaged parts.

CHANGING ENGINE COOLANT

Scheme 39

1. Remove front engine undercover with power tool.
2. Open radiator drain plug at the bottom of radiator, and remove radiator cap. CAUTION: 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 cylinder block. Refer to «DISASSEMBLY»(ref-158850-S38750682792005020300000) .
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-172368-S05715713522005022400000) .
4. Remove reservoir tank, drain engine coolant and clean reservoir tank before installing.

Scheme 40

Scheme 41

Scheme 42

1. Install reservoir tank if removed, and radiator drain plug. NOTE: Be sure to clean drain plug and install with new O-ring. Radiator drain plug: 1.18 N.m (0.12 kg-m, 10 in-lb) If water drain plugs are removed, close and tighten them. Refer to «ASSEMBLY»(ref-158850-S27450952092005020300000) .
2. Remove air relief plug on heater hose.
3. Fill radiator and reservoir tank to specified level. 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) Approximately 8.6 l (9-1/8 US qt, 7-5/8 Imp qt) Reservoir tank engine coolant capacity (at "MAX" level) 0.8 l (7/8 US qt, 3/4 lmp qt) Pour engine coolant through engine coolant filler neck slowly of less than 2 l (2-1/8 US qt,1-3/4 lmp qt) a minute to allow air in system to escape. When engine coolant overflows air relief hole on heater hose, install air relief plug with new O-ring. Air relief plug: 1.19 N.m (0.12 kg-m, 10 ft-lb)
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. Watch engine coolant 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 radiator up to filler neck with engine coolant.
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

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

1. Be careful not to bend or damage radiator fins.
2. When radiator is cleaned without removal, remove all surrounding parts such as cooling fan shroud and horns. Then tape harness and connectors to prevent water from entering.

1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces 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.

Scheme 43

Scheme 44

1. Attach spacer to the tip of radiator plate pliers A (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 A (SST) are closed dimension H" is approx. 7.6 mm (0.299 in).
3. Adjust dimension H" with spacer, if necessary.

Scheme 45

Scheme 46

Scheme 47

Scheme 48

1. Remove upper or lower tanks with radiator plate pliers B (SST). Grip the crimped edge and bend it upwards so that radiator plate pliers B slips off. Do not bend excessively. In areas where radiator plate pliers B cannot be used, use a screwdriver to bend the edge up. 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 lower tank.

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

1. Install A/T fluid cooler. Pay attention to direction of conical washer.
2. Clean contact portion of tank.
3. Install sealing rubber. Push it in with fingers. Be careful not to twist sealing rubber.
4. Caulk tank in specified sequence with radiator plate pliers A (SST). Use pliers in the locations where 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. Confirm that there is no leakage. Refer to «INSPECTION»(ref-172368-S09178603802005022400000) .

Scheme 56

Scheme 57

1. Apply pressure with radiator cap tester adapter (SST) and radiator cap tester (commercial service tool). Testing pressure : 157 kPa (1.6 kg/cm 2 , 23 psi) WARNING: To prevent the risk of the hose coming undone while under pressure, securely fasten it down with a hose clamp. CAUTION: Attach a 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.

Scheme 58