Nissan Sentra manuals

Nissan Sentra Service Manual: Structure and operation

Positive Crankcase Ventilation

This system returns blow-by gas to the intake manifold.


This system returns blow-by gas to the intake manifold.

The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake manifold.

During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV valve.

Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.

The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air passes through the hose connecting air inlet tubes to rocker cover.

Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.

The flow goes through the hose connection in the reverse direction.

On vehicles with an excessively high blow-by, the valve does not meet the requirement. This is because some of the flow will go through the hose connection to the air inlet tubes under all conditions.

On Board Refueling Vapor Recovery (ORVR)


On Board Refueling Vapor Recovery (ORVR)

From the beginning of refueling, the air and vapor inside the fuel tank go


From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is released to the atmosphere.

When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged during driving.

WARNING:

CAUTION:

Component parts
Engine control system ENGINE CONTROL SYSTEM :Component Parts Location Engine room compartment No. Component Function 1 IPDM E/R IPDM E/R control the internal relays ...

System
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Other materials:

Engine oil and oil filter recommendations
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Recommended chemical products and sealants
Refer to the following chart for help in selecting the appropriate chemical product or sealant.   Product Description Purpose Nissan North America Part No. (USA) Nissan Canada Part No. (Canada) Aftermarket Crossreference Part Nos. 1 Rear View Mirror ...

NISSAN Intelligent Key® battery discharge
If the battery of the NISSAN Intelligent Key® is discharged, or environmental conditions interfere with the Intelligent Key operation, start the engine according to the following procedure: Place the shift lever in the P (Park) position. Firmly apply the foot brake. Touch the ignitio ...

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