The EGR (exhaust gas recirculation valve) ~ above the Dodge lamb mixes exhaust gas through fresh wait from the intake manifold to lower emissions. The EGR valve provides an electric motor managed by the PCM to control the quantity of exhaust gas start the burning chamber. When electric or mechanical EGR valve failures occur, troubles such as poor acceleration and also reduced fuel economic situation can result.

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This article applies to the dodge Ram third Generation (2002-2008)

The EGR valve is an digital solenoid that moves a pintle, opening and closing a passageway for exhaust gas to circulation through. The valve is bolted come the intake manifold/cylinder head and a metal hose associate it to the exhaust manifold/intake manifold. An electric connector sends and receives signal to the PCM (powertrain regulate module) to manage the valves motion for optimal emissions. When the engine is in ~ moderate or heavy loads, the EGR valve will open up to mitigate the development of oxides the nitrogen (a poisonous gas) indigenous the combustion process. As soon as a difficulty occurs, the EGR valve can come to be stuck open or closed, top to bad fuel economy, turbulent idling, and also engine knock.


Table the Contents

EGR Valve Overview

There are several different manufactures to acquisition from when choosing an EGR valve. The components in the decision include price, obtainable warranty, user reviews, and reliability.

MoparDoormanStandard engine Products
Price$100-$120$20-$40$20-$40
Warranty24 Months/Unlimited MilesLimited Lifetime3 Years/36,000 miles
RatingRecommendedRecommendedRecommended
Reliability

High

MediumMedium

Best Quality: MoparBest Value: Doorman

Symptoms that a negative EGR Valve

Stuck ClosedEngine Knock: as the miles pass, carbon build up at the EGR valve inlet and outlets. Once this restriction becomes serious enough, engine knock can develop. This is most commonly heard as a tapping or pinging noise, because it is many noticeable throughout cruising and moderate throttle. This occurs since the engine may not realize the insufficient amount of exhaust gas entering combustion is not enough to combat engine knock. Fortunately, modern-day vehicles" computer systems space programmed with the reasonable to acknowledge this EGR flow difficulty and adjust engine parameters too as collection the linked diagnostic trouble code.

Featured Video: What Knock/Pinging/Detonation sounds Like


Stuck OpenPoor Idling, Stalling, and Engine No-Start: together the engine color etc in new air, it"s not expecting to have to compensate for the inert exhaust gas. No fuel is added to comprise for the exhaust gas, and combustion cannot take place.Poor Acceleration: The air/fuel proportion is not optimized v the valve grounding open, resulting in a decrease in engine output.

How to download the EGR Valve

The EGR valve is in different locations because that the 5.7 and also 3.7/4.7 engines. Top top the 5.7, girlfriend will uncover it tucked between the air box and alternator. Top top the 3.7/4.7, you will find it ~ above the back of the engine close to the firewall. This one is considerably harder come reach than the 5.7"s. There are a total of 4 bolts: one is top top the connector attached to the valve.

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Materials Needed1/4" ratchet3/8" ratchet1/4" 8mm socket10mm deep socketSwivel adapterFlat head screwdriver3" extension10mm wrenchShop ragBrake cleanerEmery towel or fine grit sanpaperPenetrating oilRubber glovesSafety glasses
Step 1 – remove the resonator box (4.7/3.7 engines only)

The 4.7/3.7"s EGR valve is located on the rear of the driver"s side cylinder head, make it really hard to readjust without removed the resonator box.

Refer to step 1 that the associated Article: exactly how to replace Ignition Coils and also Spark Plugs because that this procedure.

Step 2 – eliminate the EGR valve

Begin removed the EGR valve from the 5.7 engine by locating it in between the air box and alternator. In ~ the optimal of the valve you will view a black electrical connector plug with a red tab. Press the red tab come the appropriate to unlock it, and then squeeze the functional tab on the connector plug if pulling it away from the valve.

Now, remove the exhaust water tap from the EGR valve. There space two bolts with 8mm heads. If her hose shows up rusted, soaking the bolts through a penetrating lubricant will mitigate the chance of a bolt breaking.

Lastly, remove the 2 bolts v 10mm heads holding the valve to the intake manifold. It"s ideal to usage a deep socket come reach this bolts.

The only difference in removal for the 4.7/3.7 EGR valve is its location. Disconnect the electrical connector the same way as the 5.7"s. As soon as your are ready to remove the exhaust hose from the valve, usage a 1/4" 8mm socket with a swivel and also a 3" extension. You will not have the ability to see the 2 bolts with 10mm top holding the valve come the cylinder head, and will have to remove them by feel. The EGR valve will then be prepared for removal.

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Figure 1. The place of the 5.7 engines EGR valve.
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Figure 2. The EGR valve turn off of the truck.
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Figure 3. The location of the EGR valve on the 4.7/3.7 engines.
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Figure 4. The 4.7/3.7 EGR valve removed.Step 3 – Clean the gasket mating surfaces

This uses to the encounters of the exhaust hose and intake manifold/cylinder head. Usage a well grit sandpaper or emery cloth together with brake cleaner and also a rag to remove all of the carbon/gasket material from these surfaces.

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Figure 5. The cylinder head EGR mating surface on the 4.7/3.7 engine.Step 4 – download the new EGR Valve

Slide the 2 bolts through 10mm heads with the valve, and then location the gasket over the bolts. Now overview the valve down right into position against the cylinder head/intake manifold. Thread the bolts by hand first, and also then tighten them down till snug. Location the new exhaust hose gasket onto the surface of the exhaust hose, and slide the two bolts through 8mm heads right into the hose. Install the water tap to the valve by hand first, and then tighten the bolts till snug. Push the electric plug earlier into the EGR valve plug, and lock the plug through the red tab.

For the 4.7/3.7, girlfriend will need to re-install the resonator box.

To clean the inspect engine light, disconnect the an adverse battery cable through a 10mm wrench for 5 minutes.

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Figure 6. The 4.7/3.7"s brand-new EGR valve has actually been installed.

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