Engine Cooling System: Other Nissan Murano Z50

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 the SUPPLEMENTAL RESTRAINT SYSTEM and SEAT BELTS articles.

Scheme 28

1. After removing mounting bolts and nuts, separate the mating surface using the seal cutter [SST] and remove old liquid gasket sealing. CAUTION: Be careful not to damage the mating surfaces.
2. Tap seal cutter to insert it, and then slide it by tapping on the side (Scheme 28)
3. In areas where seal cutter is difficult to use, use a plastic hammer to lightly tap the parts, to remove it. CAUTION: If for some unavoidable reason tool such as a screwdriver is used, be careful not to damage the mating surfaces.

Scheme 29

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Scheme 31

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 the tube presser [SST: WS39930000 (-)]. Use Genuine RTV Silicone Sealant or equivalent. Refer to «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-233992-S15687029032006052800000) .
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 the article. Within five minutes of liquid gasket application, install the mating component. If liquid gasket protrudes, wipe it off immediately. Do not retighten after 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 from those of special service tools illustrated here.

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

Scheme 39

1. To check for leaks, apply pressure to the cooling system with the radiator cap tester (commercial service tool) and the radiator cap tester adapter [SST]. Testing pressure :157 kPa (1.6 kg/cm2, 23 psi) WARNING: Never remove radiator cap when the engine is hot. Serious burns could occur from high pressure engine coolant escaping from the radiator. CAUTION: Higher testing pressure than specified may cause radiator damage. NOTE: In case that engine coolant decreases, replenish radiator with engine coolant.
2. If anything is found, repair or replace damaged parts.

Changing Engine Coolant

Scheme 40

Scheme 41

1. Remove radiator drain hole cap on undercover.
2. Open radiator drain plug at the bottom of radiator, and then remove radiator cap. When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer to «DISASSEMBLY»(ref-233993-S09363877202006052800000) .
3. Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.
4. 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-233995-S09947050972006052800000) .

Radiator Upper Clip

Install radiator upper clip on radiator core connection as follows

Scheme 42

1. Install mounting rubbers (upper) on mounting pins of radiator.
2. Align radiator upper clip with radiator core connection, then insert radiator upper clip straight into radiator core connections until a click is heard.
3. After connecting radiator upper clip, use the following method to make sure it is fully connected. Visually confirm that two radiator upper clips are connected to radiator core connections. Move radiator upper clip and the radiator forward and backward to make sure they are securely connected.

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

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Scheme 48

1. Remove upper and lower tanks with the radiator plate pliers B [SST]. CAUTION: Do not disassemble lower tank and CVT fluid cooler. NOTE: Regard lower tank and CVT fluid cooler as an assembly. Grip the crimped edge and bend it upwards so that the radiator plate pliers B slips off. CAUTION: Do not bend excessively. In areas where the radiator plate pliers B cannot be used, use a 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.

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Scheme 51

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Scheme 54

1. Clean contact portion of tank.
2. Install new sealing rubber while pushing it with fingers. CAUTION: Be careful not to twist sealing rubber.
3. Caulk tank in numerical order (Scheme 51)with the radiator plate pliers A [SST]. Use pliers in the locations where the radiator plate pliers A cannot be used.
4. Make sure that the rim is completely crimped down. Standard height "H": 8.0-8.4 mm (0.315-0.331 in)
5. Make sure that there is no leakage. Refer to «INSPECTION»(ref-233995-S05930229592006052800000).

Scheme 55

1. Apply pressure with the radiator cap tester adapter [SST] and the radiator cap tester (commercial service 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 CVT 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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Cooling Fan

Inspect cooling fan for crack or unusual bend.

1. If anything is found, replace cooling fan.

THERMOSTAT

THERMOSTAT OPERATION STANDARDS