The EGR valve on a Volvo D13 engine is typically located on the back end of the exhaust manifold which can be found on the right side of the engine behind and slightly above the turbocharger. It has a cylindrical body with a unique semi-rectangular-shaped valve that is mounted to the exhaust manifold with 4 bolts.
Here are the most common symptoms of a failing EGR valve on a Volvo D13 engine:
Decreased fuel efficiency
When the EGR valve is stuck open or not functioning properly, it can cause the engine to run less efficiently, resulting in decreased fuel efficiency.
Poor engine performance
A faulty EGR valve can cause a variety of performance issues, such as a loss of power, rough idle, and hesitation during acceleration.
Check engine light
The EGR valve is connected to the vehicle's onboard diagnostic system, so if it is not working correctly, it may trigger the check engine light to come on. In some cases, the check engine light may escalate to a 5mph derate if ignored, as the truck may attempt to perform parked regenerations but fail due to the malfunctioning EGR valve.
A failing EGR valve can lead to an increase in emissions, such as carbon monoxide and nitrogen oxides, therefore throwing off the parameters required to complete a parked regeneration.
Excessive soot build-up
A faulty EGR valve can cause excessive soot buildup in the EGR cooler, EGR differential pressure sensor, venturi pipe, and even the actual valve inside of the EGR valve which can cause it to bind causing it to not open and close properly, which can lead to failed regenerations and other issues.
In some cases, a failing EGR valve can cause the engine to overheat, as it is not able to dissipate heat properly.
It's important to note that these symptoms can also be caused by other issues, so it's always best to have a trained technician diagnose the problem and recommend the appropriate repairs. Ignoring these symptoms can lead to more serious problems and costly repairs in the long run.
If you are looking to replace or test your EGR valve, check out the EGR valve gaskets necessary for this job:
Also check out our EGR Valve elbow clamps, if you need them as well: