![Toyota](images/nissan.png)
Nissan Versa
Sedan Service Manual
Engine » Engine cooling system (CO)
Thermostat
Exploded View
![THERMOSTAT](images/books/322/9/index.34.jpg)
1. Radiator hose (lower) 2. Water inlet 3. Rubber ring
4. Thermostat A. To radiator
Removal and Installation
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns
could occur from highpressure
engine coolant escaping from the radiator. Wrap a thick cloth around the
radiator cap. Slowly turn it a
quarter of a turn to release builtup pressure. Carefully remove radiator cap by
turning it all the way.
REMOVAL
- Drain engine coolant from radiator.
CAUTION:
- Perform this step when engine is cold.
- Do not spill engine coolant on drive belt.
- Remove air duct.
- Remove oil level gauge and guide.
- Disconnect radiator hose (lower) from water inlet.
- Remove water inlet, thermostat, and rubber ring.
NOTE:
Engine coolant will leak from cylinder block, so have a receptacle ready
below.
INSPECTION AFTER REMOVAL
Thermostat
- Place a thread (A) so that it is caught in the valves of thermostat
(1). Immerse fully in a container (B) filled with water. Heat while
stirring.
- The valve opening temperature is the temperature at which the
valve opens and falls from the thread.
- Continue heating. Check the full open valve lift amount.
- After checking the maximum valve lift amount, lower the water
temperature and check the valve closing temperature.
![THERMOSTAT](images/books/322/9/index.35.gif)
- If out of the standard specification range, replace the thermostat.
INSTALLATION
Installation is in the reverse order of removal.
Thermostat
![THERMOSTAT](images/books/322/9/index.36.jpg)
- Install thermostat (2) into the cylinder block (1) with jiggle valve (A)
facing upward.
![THERMOSTAT](images/books/322/9/index.37.jpg)
Water Inlet
After installation, attach the water inlet clip (A) on the oil level gauge
guide (1) positioned at location (B) as shown.
![THERMOSTAT](images/books/322/9/index.38.jpg)
INSPECTION AFTER INSTALLATION
- Before starting engine, check oil/fluid levels, including engine coolant
and engine oil. If less than required
quantity, fill to the specified level.
- Use procedure below to check for fuel leakage.
- Turn ignition switch ON (with engine stopped). With fuel pressure
applied to fuel piping, check for fuel leakage
at connection points.
- Start engine. With engine speed increased, check again for fuel leakage
at connection points.
- Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and
installation, slack in the guide
may generate a pounding noise during and just after engine start. However,
this is normal. Noise will stop
after hydraulic pressure rises.
- Warm up engine thoroughly to make sure there is no leakage of fuel,
exhaust gas, or any oils/fluids, including
engine oil and engine coolant.
- Bleed air from passages in lines and hoses, such as in cooling system.
- After cooling down engine, again check oil/fluid levels, including
engine oil and engine coolant. Refill to specified
level, if necessary.
- Summary of the inspection items:
Item |
Before starting engine |
Engine running |
After engine stopped |
Engine coolant |
Level |
Leakage |
Level |
Engine oil |
Level |
Leakage |
Level |
Transmission/
transaxle fluid |
A/T and CVT Models |
Leakage |
Level/Leakage |
Leakage |
M/T Models |
Level/Leakage |
Leakage |
Level/Leakage |
Other oils and fluids* |
Level |
Leakage |
Level |
Fuel |
Leakage |
Leakage |
Leakage |
Exhaust gas |
|
Leakage |
|
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Thermostat
Nissan Versa Sedan Service Manual
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