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What Is an EGR Valve?
The EGR valve is an integral part of the emissions control system in automobiles. EGR stands for "Exhaust Gas Re-Circulation." Without it an automobile won't pass smog. It reduces the production of NOx (One vehicle produced by Chrysler doesn't require it).
When an engines internal temperature reaches 2500 F degrees the combustion process starts to produce NOx (nitrogen oxide). NOx is then expelled into the atmosphere via the exhaust pipe. Once in the atmosphere it is what is referred to as "air pollution". We breath the air, right? So NOx in the atmosphere is not good. That's where the EGR valve comes into play. It is designed to reduce the amount of NOx emissions from automobiles.
This is accomplished by recirculating a portion of the exhaust. Engines have a small passage between the intake and exhaust manifold. The EGR regulates this passage. When the valve opens, the engine draws in the exhaust through the EGR valve and puts it through the combustion process again. This causes the combustion temperature to decrease enough so NOx will be kept to a minimum.
If you hear "pinging" upon acceleration or erratic idling in your engine you should check the EGR valve for clogging or replacement. All that recirculated exhaust builds up carbon in the valve which can make it stick in the open or closed position.
Where Is the EGR Valve?
If you've decided to clean the EGR valve or replace it all together, you'll need to locate it in the engine compartment. It is located on the intake manifold. What and where is the intake manifold you ask? I had a feeling some people may not know exactly where this is, so let's take this from the top down, just as if you had opened the hood and you're looking at the engine:
- The air filter is the highest setting item on the engine (nearly touching the hood when it's closed). Below the air filter is the...
- Carburetor. The carburetor is connected to the...
- Throttle body. Which is attached to the...
- Intake manifold where the....
- EGR is located.
The reason it's attached to the intake manifold, is so it can intercept the exhaust and recirculate it.
Mechanical & Electronic EGR
If you decided you'd like to try cleaning the EGR valve first, great! I always make an attempt at cleaning a part to see if that will fix it before I go and blow any cash on a new one. The more use you can get out of a part, the better. Waste not, want not, right.
There are two kinds of EGR valves; the mechanical type and the electronic type. First I'll go over cleaning the mechanical type:
- Locate the EGR valve in your engine.
- Remove the vacuum hoses from the valve and inspect the lines. Spray carburetor cleaner inside the lines. Clean out the lines using a pipe cleaner if needed.
- If there are bolts attaching the valve to the engine, remove them.
- If the mounting gasket is in good shape you can set it aside and reuse it.
- Inspect and clean with carburetor cleaner and a toothbrush all the ports on the valve making sure the vacuum diaphragm moves freely.
- Replace any mounting bolts. Reattach hoses. And there you have it!
Now for the electronic type:
- Disconnect the negative battery cable from the battery. This will help avoid short circuiting the valve.
- Disconnect any sensors at the valve and remove any mounting bolts.
- Inspect the mounting gasket to see if it needs replacing. Set aside, if it is in good shape, to use when re-installing. If it is torn or compromised with oil or debris, replace it.
- Spray the valve and connecting hoses with carburetor cleaner and using a pipe cleaner and or toothbrush, clean out the lines. Make sure you avoid spraying the electrical connections or sensors. Carburetor cleaner will damage them. If the sensors and electrical connectors are in need of cleaning a special cleaner just for electrical connections is available at a reasonable cost.
- Place the gasket and reattach mounting bolts.
- Reconnect the hose lines and sensors.
- Hook up the negative battery cable. And you're done!
I always enjoy hearing from my readers! But I cannot answer each and every question asking where the EGR valve is on their particular vehicle. Read this article carefully, noting the pictures of an EGR valve, and apply what you read to your particular vehicle. If you still can't find the EGR valve, then go ahead and post a question to me and I'll try to help.
This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.
Questions & Answers
Question: Where is the EGR valve located on a V8 overhead cam engine?
Answer: Front and center of the engine. Almost touching the air filter.
Question: Where is the E.G.R. valve on a 3.6 Cadillac?
Answer: The E.G.R. valve in the Cadillac 3.6 looks slightly different from the usual car. It's a black cylinder shape located at the front, right, of the engine.
Question: Where is the EGR valve in a 2003 Toyota Prado 4 litre petrol?
Answer: Very near, if not touching, the air cleaner.
Question: Where is the EGR valve located on a 2005 ml350?
Answer: On the ml 350, the EGR valve, when looking at the engine from the front, will be on the right side, near the engine block, toward the front. Look for the telltale shape of the EGR valve. It may be in a sideways position.
Question: Where is the E.G.R. valve located on a 1997 Nissan Elgrand homy diesel?
Answer: If you review the photo's in the article and the various configurations offered you will be able to determine where the E.G.R. valve is located.
Question: where is the EGR located on a 2009 dodge avenger 2.4L?
Answer: The 2009 Dodge Avenger EGR valve is not shaped like the old EGR valve; it is a cylinder shape on this vehicle. It is located on the left side of the engine near the front.
Question: Where is the E.G.R. valve located on a 2011 Mazda MX5?
Answer: If you review the photos in the article and the various configurations offered you will be able to determine where the E.G.R. valve is located.
Question: Where is the E.G.R. valve located on a 1998 mercury tracer ?
Answer: It is located directly to the right side of the engine when you are standing at the bumper looking at the engine. It looks like a wide brim hat.
Question: How long does it take to replace the EGR valve on a 2006 Chevy Equinox?
Answer: There is no set time as to how long it takes to replace an EGR (Exhaust Gas Recirculation) valve like changing the oil or spark plugs, etc. You know it needs to be replaced when the check engine light comes on coupled with a rough idle, poor acceleration, and poor gas mileage.
Question: I bought a new EGR valve for my 2013 KIA RIO, but I don't see anything that looks like a small plastic canister with wiring and 2 hoses, where should I be looking?
Answer: The EGR valve is normally metal. Your vehicle may have plastic but I would be looking for a metal, circular, piece on top of the engine area, usually towards the right, just off center. It may be below the air cleaner.
Question: Where is the EGR valve located in a 1992 98 Olds Regency?
Answer: If you read the article How To Find The EGR Valve In An Engine it explains how to find it, even for the older model automobiles. They haven't moved the EGR and if they did, it's nearby.
Question: I can't find my EGR valve in my 1997 Mitsubishi Montero sport. Could the EGR valve in my car be under the intake and above the exhaust manifold?
Answer: That is exactly where I would look for it. They tend to be front and center or towards the right when looking at the engine from the front.
Question: Where can I find the EGR on a Ford Transit?
Answer: Look toward the right side of the center of the engine, towards the firewall. The EGR sits under the large air intake hose.
Question: Where is the ERG valve located on 1999 dodge ram 2500 gasoline?
Answer: You're going to be looking towards the side of the engine. The hose for the EGR valve connects to the engine just below the upper, large, radiator hose. The EGR hose is smaller than the radiator hose and easy to spot. Follow the hose back on the side of the engine and you will find the EGR valve.
Question: Where is the EGR valve located on 2001 Subaru Forester ?
Answer: You will find the EGR valve seated above the intake manifold.
Question: Where is the EGR valve located on an overhead cam 4.6 V8 Mercury Grand Marquis 1995?
Answer: I am not familiar with the 1995 Mercury Grand Marquis. Locate the intake manifold and you will find the EGR valve attached to it.
Question: Where is the EGR valve on a 2007 Silverado K1500 5.3 liter engine?
Answer: On top of the engine just in front of the carburetor.
Question: Where is the EGR valve located on a 2011 Hyundai Santa Fe 2.4 engine?
Answer: You will find the EGR valve for the 2011 Hyundai Santa Fe by facing the engine, on the right side of the engine, look towards the back of the engine, very near the firewall.
Question: After changing the piston ring and valve seals on a Toyota Lite Ace 5k engine, the engine started okay, but it had high rpm and poor idling. This is an engine with a carburetor. What is the cause?
Answer: Replacing the piston rings and valve seals involves removing the carburetor and part of the intake, and it's attached hoses, my first thought is to recheck the hoses for a vacuum leak. This will cause a high idle situation and it is easy to overlook or forget to connect a vacuum hose.
Question: If I buy a new carburetor will it come equipped with an EGR valve?
Answer: No. These are two separate components that must be purchased separately. The carburetor is fuel, the EGR is smog.
Question: Where is the EGR valve located on a 2005 Suzuki XL7?
Answer: Following the direction of the article, you should look at the engine, at the left side of the engine block, up by the firewall you will find the EGR valve and the position sensor right next to each other.
Question: Where is the EGR valve located on a 2004 Toyota Rav 4?
Answer: The right side of the engine, center, and I believe it is in a sideways position.
Question: Where is the EGR valve on a 2014 Chevy Traverse?
Answer: I am not familiar with the Chevrolet Traverse. I am very familiar with Chevrolet vehicles and the EGR is located front and center on these engines. I hope this is helpful for you.
Question: Where is the EGR valve located in a 2001 Subaru Forester?
Answer: Just above the exhaust manifold.
Question: I cleaned the EGR valve (electronic type) in my Isuzu Trooper. It sits on top of the gasket. Underneath it is a part with two small holes that I understand lead into the intake manifold. Can I spray down into those holes?
Answer: Yes. Use carburetor cleaner.
Question: Where is the position of the EGR on 2003 Toyota Prado 4 litre petrol?
Answer: Very near, if not touching, the air cleaner.
Question: Where is the EGR valve located on a 2004 Mercury Sable GS?
Answer: Look to the back of the engine at the firewall.
Question: Where is the EGR valve located on a Cadillac DeVille Northstar engine?
Answer: Looking at the engine from the front, the EGR valve is located towards the rear of the engine just to the right side of the center.
Question: Where is EGR valve located on a 2003 GMC Envoy XL?
Answer: The purpose of the EGR valve is to recirculating engine exhaust gas to the back to the engine cylinders. To accomplish this task the EGR valve is attached to the intake manifold of the engine. This location is atop of the engine near the carburetor, usually towards the back of the engine near the firewall.
Question: Where is the EGR Valve on a 2000 Hyundai Elantra?
Answer: I believe you will find the EGR valve on your Hyundai Elantra, near to the dead center of the engine, and maybe slightly to the left.
Joanna (author) from Wilseyville on September 13, 2020:
I apologize for such a late response!! It says fifteen months ago but that's impossible because I've been on here several times in the last six months! Again, I apologize and I hope you got it worked out.
Darelen Shave on June 13, 2019:
just bought a used Subaru forester having a lot of problems with it wanting to stall,did a coil wires and spark plug change still doing this,i need to know where the egr valve is located that is my next troubleshoot then the fuel valve please help