What does the EGR cooler bypass valve do?
EGR bypass valve – Located on the intake inlet. The ECM uses this valve to allow exhaust gas into the engine without going through the EGR cooler (EGR cooler bypass).
Can I bypass the EGR cooler?
You can clean your valve with carb cleaner and refit it. Or, you can blank or bypass the valve completely.
How do I test my EGR cooler LLY Duramax?
To do this test, turn off your rig. When its all cooled down, remove the EGR valve (between your alternator and oil filter – it looks like a 7-ounce beer can with wires going to it) and look inside with a flash light. If it looks wet, gooey or steam cleaned, then you probably have EGR cooler problems.
What happens if EGR cooler fails?
When EGR cooler starts to fail, it will drain a lot of coolant out of the EGR cooler into your exhaust system. When that happens, the exhaust goes thru and interacts with that coolant and turns it into steam then come out in a form of white smoke out of the back of your exhaust system.
Can EGR cooler cause turbo failure?
The EGR cooler is another part in the diesel EGR system meant to reduce NOx gas emissions. The results of this failure can damage a number of different EGR system components, including the VGT turbo. Most failures happen inside the EGR cooler, so it’s easy to miss until symptoms start to show up elsewhere.
What happens if you delete EGR valve?
An EGR delete kit is an aftermarket performance part that removes the EGR valve and prevents exhaust from being redirected back to the engine. Ultimately, this allows your vehicle to function as if it never had an EGR valve. As mentioned above, EGR valves limit efficiency and rob engines of their performance.
Is EGR blanking illegal?
Although it is not illegal to remove the EGR from your vehicle, it is an offence under the Road vehicles (Construction and Use) Regulations (Regulation 61a(3))1 to use a vehicle which has been modified in such a way that it no longer complies with the air pollutant emissions standards it was designed to meet.
What are the symptoms of a bad EGR cooler?
Signs That Your EGR Cooler Needs to Be Replaced
- Overheating engine: Perhaps the first symptom that manifests itself when you’re having EGR cooler issues is an overheating engine.
- Exhaust leaks: Exhaust leaks are often a result of failing EGR cooler gaskets, or other types of damage to the cooler.
How do you know if your EGR cooler is bad?
Gooey EGR valve. The best way to check if you have a bad EGR cooler is to pull your EGR valve; the EGR valve is located on top of the engine next to the engine oil filter. If you pull that valve out, it should be full of a nice dry black charcoal carbon which is from the exhaust system.
How does the EGR system on a LLY Duramax work?
The EGR system included a EGR valve and cooler. At a high level, the EGR system recirculates exhaust air back through the engine so that it can be re-burned in the combustion cycle, reducing the amount of nitrogen oxide released into the atmosphere.
What kind of turbocharger does LLY Duramax use?
In addition to EGR, the LLY switched over to variable-vane turbocharger (VVT) which helped improve engine performance over its predecessor.
Are there any problems with the LLY engine?
The new upgrades to the LLY removed some of the common LB7 problems such as fuel injector and fuel pump failure. However, there are a number of new issues that have arisen due to the changes, and a number of shared problems with the LB7.
