Part 2 of 2: Testing the repair
- Step 1: Listen for symptoms of a bad component.. Pay attention for any sounds that may indicate a malfunctioning EGR...
- Step 2: Watch for leaks.. Look for any leaks or gases escaping from the connections of the EGR tube.
- Step 3: Check for warning lights or codes.. Watch for any warning lights or error codes that appear on the dashboard or...
How to replace EGR tube?
- It is difficult to start the engine cold. When there is a leak in the EGR system, it typically sends false information to the ECM which then adjusts the flow ...
- The Check Engine Light is triggered. ...
- There are rattling sounds coming from the engine. ...
- The vehicle fails emissions testing. ...
How much would it cost to replace an EGR valve?
How Much Does EGR Valve Replacement Cost? Getting the EGR Valve replaced will cost you between $150 to $500. This is inclusive of the parts and the labor involved to fit the part. Depending on the car’s model, the EGR Valve sells between $70 to $450. Auto Center.
When and how to clean an EGR valve?
Symptoms of a Failing EGR Valve
- Identify if you have a mechanical or electronically controlled EGR valve. ...
- Remove the negative battery cable. Wait for the engine to entirely cool down.
- Find the EGR valve and spray WD-40 or other penetrating solution onto the valve bolts. ...
- Disconnect the vacuum tube running to the intake manifold and any electrical connectors. ...
How often do you need to replace the EGR valve?
- You may start to notice a sudden loss of power. ...
- If the valve is stuck, it can result in the car not running smoothly. ...
- If you have tried to pass an emissions test recently, only to have your vehicle fail, that can be due to a faulty EGR valve. ...
- Your Check Engine Light may come on since the engine is not operating as it should. ...
Can you weld a EGR tube?
You could also take the tube off and have it braze welded or braze weld it yourself. Mig welding might also work but on heat cycled metal, mig isn't usually recommended. Several years ago I braze welded an EGR tube back together and it held fine.
How much does it cost to replace EGR tube?
The average cost of replacing the EGR valve in your vehicle is anywhere from $250 to $350 on average, depending on your vehicle's year, make, and model as well as the type of system it has. The cost of parts will be somewhere around $190 to $270, while the cost of labor will be anywhere from $60 to $80.
What does the EGR tube connected to?
It connects the exhaust manifold to the intake manifold and is controlled by either a vacuum or a built-in electric step motor. The function of the EGR valve is to control the flow of exhaust gas being recirculated depending on the engine load.
Can EGR be repaired?
An Easy Repair You Can Do at Home If your car is running poorly, you may be having problems with your exhaust gas recirculation valve, or EGR. While you can't test your EGR valve function from home, you can clean it there, a simple task that effectively acts as a repair.
Does EGR damage engine?
So not only does EGR hamper performance by coating and then shrinking the size of the intake path, but it is also hard on engine oil, and even degrades the coolant that is used to cool off the exhaust gases passing through the EGR cooler.
What damage can a faulty EGR valve cause?
A faulty EGR valve can cause problems with the flow and operation of the EGR system leading to performance issues including a reduction in power, reduced acceleration and decreased fuel efficiency. It can also cause vehicle emissions to increase.
Can car run without EGR?
It might affect the environment but it is not harmful to the engine. Some people are running for more than 50k km without EGR. The EGR is disabled in all remapping.
Where is the EGR tube?
The EGR valve is usually located near or attached to the intake manifold, with a tube running to the exhaust manifold. There should also be a vacuum or electrical connector (or both) running to the valve which will need to be detached.
How hot is EGR tube?
The maximum temp at the egr flange end of the tube was 339.8 F. The maximum temp at the plenum flange was 178.2 deg. F. The silver solder melts at 700 deg F.
How do you clean an EGR tube?
1:533:26Cool Trick to Clean EGR Valve in Your Car (Low Flow Code P0401)YouTubeStart of suggested clipEnd of suggested clipAnd before I put the EGR valve there's another trick get some wd-40 spray it in the hole. I'll letMoreAnd before I put the EGR valve there's another trick get some wd-40 spray it in the hole. I'll let it soak for about half an hour the penetrating oil will get on the stem.
Does WD 40 clean EGR?
If you just want something to clean your EGR valves that will do the job well without hassle, we recommend going with the WD-40 specialist cleaner. WD-40 products are widely available, and trustworthy, and you will be able to get your EGR valves cleaned effectively using it.
What happens when EGR is blocked?
If the EGR system is clogged up, or the valve is stuck closed, the combustion temperature increases. This may cause pinging (detonation), as well as surging on light acceleration. In a diesel engine, a bad EGR valve is one of the causes of a black smoke. The Check Engine light might also come on in either case.
How much does it cost to replace an EGR cooler?
For a replacement EGR cooler you could be looking at between $270 and $3700, which will vary from case to case. The higher end pricing usually applies to modified or high performance engines, so for a passenger car you are likely looking at the lower end of the spectrum.
How much does it cost to replace a exhaust gas recirculation?
between $400 and $1000Depending on the make, model, and year of your vehicle, replacing your EGR valve can cost anywhere between $400 and $1000.
Are EGR valves expensive to replace?
Make sure you ask your mechanic to check if it's enough to simply clean the valve, or if you need to replace it. If cleaning is enough, that will save you a lot of money, as a new EGR valve is expensive. Often, however, you will find that this is not enough, and a replacement has to be done.
Can I replace my EGR valve myself?
In most models, replacing an exhaust gas recirculation (EGR) valve is not difficult. You can do it in your garage in about an hour or two depending on your particular system, using some common tools and a good solvent like carburetor cleaner.
Why are EGR tubes worn out?
However, due to its location and the fact that hot exhaust gases flow through it frequently, it can wear out or develop cracks or holes which renders the EGR system useless.
What happens if an EGR tube leaks?
The vehicle fails emissions testing. When the EGR tube is leaking, it may increase vehicle emissions of particulate matter or carbon monoxide emissions, levels of which are important for passing emissions standards in all 50 U.S. states. If the vehicle fails an emissions test, you'll have to determine the exact cause, but it could be the result of a bad EGR tube.
How to remove EGR valve?
Use a boxed end wrench to loosen the nuts connected to the EGR valve and then remove the old EGR tube from the vehicle.
How long does it take for EGR bolts to soak?
After the bolts have soaked for about 5 minutes, remove the bolts that connect the EGR tube to the intake manifold. Depending on the vehicle you are working on, there will be either one connection to a single intake port or several connections to multiple individual intake ports.
What is smog in EGR?
Smog is essentially nitric oxides, or unburnt fuel in the form of NoX. The EGR system is able to take unburnt fuel that comes from the exhaust manifold and recirculate the molecules into the intake manifold.
Why does my EGR rattle?
There are rattling sounds coming from the engine. When the EGR tube is loose, it will often rattle and cause a loud vibration to occur under the hood of the vehicle. A loose fitting EGR tube can be repaired if it's caught early enough. Acceleration will exacerbate this symptom. The vehicle fails emissions testing.
What was the purpose of the EGR system?
The intent of this system, which was launched in 1966, was to find a way to reduce the particulate matter or “smog” that would flow from vehicle exhaust pipes. Smog is essentially nitric oxides, ...
What does it mean when you hear something moving back and forth?
If you hear something moving back and forth inside, that's the diaphragm—which means there is a good chance that your EGR valve is still good and just needs to be cleaned to return to normal function. If you don't hear anything, your EGR valve might be stuck or it might be bad.
What happens if your car is running poorly?
If your car is running poorly, you may be having problems with your exhaust gas recirculation valve, or EGR. While you can't test your EGR valve function from home, you can clean it there, a simple task that effectively acts as a repair.
How to remove EGR valve?
Remove the bolts that attach the EGR valve assembly to the engine. If it doesn't come right off when you have removed the nuts or bolts, it's safe to give a slight tap with a block of wood or a tiny hammer to loosen it.
Can you reinstall an EGR valve?
Now you can reinstall your clean EGR valve. Don't forget to reattach your vacuum hose and your electrical connections, if applicable. If this process worked, great! If you are still experiencing problems you feel can be traced to the EGR valve, you may have to go ahead and replace it.
Is exhaust gas recirculation valve easy to clean?
There's nothing like turning what could be a very expensive (or at least moderately costly) repair into a home repair victory, and the exhaust gas recirculation valve is easy to access and easy to clean as long as you take a few precautions.
Can you reuse a gasket?
Remove the Gasket. If your gasket looks okay and isn't torn, frayed, or disintegrated, you can reuse it. If it's questionable, install a new one. We recommend installing a new gasket with any repair.
Who is Matthew Wright?
Matthew Wright has been a freelance writer and editor for over 10 years and an automotive repair professional for three decades specializing in European vintage vehicles.