Engine Cooling System: Diagnosis Nissan 350Z I

INSPECTION AFTER REMOVAL

1. Check for badly rusted or corroded water pump body assembly.
2. Check for rough operation due to excessive end play.

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1. Install new O-rings to water pump.
2. Apply engine oil and engine coolant to the O-rings as shown. Locate the O-ring with white paint mark to engine front side.
3. Install the water pump. Do not allow cylinder block to nip the O-rings when installing the water pump. Check that timing chain and water pump sprocket are engaged. Insert water pump by tightening mounting bolts alternately and evenly.
4. Remove dust and foreign material completely from backside of chain tensioner and from installation area of rear timing chain case.
5. Turn the crankshaft pulley clockwise so that the timing chain on the timing chain tensioner side is loose. When installing the timing chain tensioner, engine oil should be applied to the oil hole and tensioner.
6. Install the timing chain tensioner.
7. Remove the stopper pin.
8. Install chain tensioner cover and water pump cover. Before installing, remove all traces of liquid gasket from mating surface of water pump cover and chain tensioner cover using a scraper. Also remove traces of liquid gasket from the mating surface of the front cover. Apply a continuous bead of liquid gasket to mating surface of chain tensioner cover and water pump cover. Use Genuine RTV Silicon Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-212003-S40484602202005122200000) ".
9. Install water drain plug on water pump side of cylinder block.
10. Installation is in the reverse order of removal for remaining parts. After starting engine, let idle for three minutes, then rev engine up to 3,000 RPM under no load to purge air from the high-pressure chamber of the chain tensioner. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern.

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1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2. Check valve opening temperature and maximum valve lift. STANDARD Thermostat Standard Valve opening temperature 76.5° C (170&°F) Valve lift 8.6 mm / 90° C (0.339 in/194° F)
3. Then check if valve closes at 5° C (9° F) below valve opening temperature.

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