Engine Emission Control - 2.5l - (except Hybrid) Mercury Mariner II рестайлинг

Material Specifications

MATERIAL SPECIFICATIONS

Torque Specifications

TORQUE SPECIFICATIONS

Note. Do not permanently remove or render inoperative any part of the vehicle emission control system including related hardware. Failure to comply may violate applicable state and federal law.

Note. The vehicle emission vacuum routing diagrams are contained in the Description and Operation subsection of the Evaporative Emissions service information. Refer to EVAPORATIVE EMISSIONS article.

The engine emission control system consists of the

1. EGR system.
2. PCV system.

EGR System

The EGR system returns a small amount of exhaust gas into the intake manifold. This reduces the overall combustion temperature. Cooler combustion temperatures provide a significant reduction of the Nitrogen Oxides (NOx) in the exhaust emissions.

The engine incorporates a stepper motor-controlled EGR valve which receives its signal from the PCM. Engine coolant is used to cool the EGR valve. The EGR valve and stepper motor are serviced as an assembly.

The amount of recirculated exhaust gas depends on

1. engine rpm.
2. intake manifold vacuum.
3. exhaust backpressure.
4. engine coolant temperature.
5. throttle position.

PCV System

The PCV system uses intake manifold vacuum to ventilate blow-by vapors from the crankcase and return the vapors to the intake manifold for combustion. The PCV valve varies the amount of blow-by vapors returned to the intake manifold based on available engine vacuum. The PCV valve is serviced as part of the crankcase vent oil separator.

Refer to the INTRODUCTION article.

MATERIAL SPECIFICATIONS

Scheme 67

ITEM DESCRIPTION

Removal and Installation

1. Drain the cooling system. For additional information, refer to «ENGINE COOLING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-except-hybrid) article.
2. Remove the Air Cleaner (ACL) outlet pipe. For additional information, refer to «INTAKE AIR DISTRIBUTION AND FILTERING - 2.5L»(/mercury/mariner/ii-2011-2011/remont/removal-installation/#intake-air-distribution-and-filtering-25l-except-hybrid) article.
3. Disconnect the EGR valve electrical connector.
4. Release the clamp and remove the coolant hose from the EGR valve.
5. Remove the 2 bolts and the EGR valve. To install, tighten to 20 Nm (177 lb-in).
6. Remove and discard the EGR valve gasket. Clean and inspect the EGR gasket mating surfaces.
7. To install, reverse the removal procedure.
8. Fill and bleed the cooling system. For additional information, refer to «ENGINE COOLING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-except-hybrid) article.

Scheme 68

ITEM DESCRIPTION

1. Remove the intake manifold. For additional information, refer to «ENGINE MECHANICAL - 2.5L»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-25l-except-hybrid) article.
2. Release the coolant bypass hose from the clip.
3. Remove the 8 bolts, the crankcase vent oil separator. To install, tighten to 10 Nm (89 lb-in).
4. To install, reverse the removal procedure. Clean and inspect the sealing surfaces. Install a new crankcase vent oil separator gasket.

See also:
• EVAPORATIVE EMISSIONS
• INTRODUCTION
• ENGINE COOLING
• INTAKE AIR DISTRIBUTION AND FILTERING - 2.5L
• ENGINE MECHANICAL - 2.5L