Exhaust Gas Recirculation Valve Replacement Made Easy
One of our members, Mark Doiron, had to replace the Exhaust Gas Recirculation (EGR) Valve on his JK Wrangler after 50,000-miles of driving. When his dealer kept clearing the code, Mark felt like it was time to make the fix more permanent. He took matters and tools into his own hands and went to work.
If you go by the Jeep repair manual, the EGR valve replacement is a very difficult job that not many technicians probably want to deal with. By the book, it tells the technician to do the full repair from under-hood.
Well, Mark and fellow member TORN decided to find an easier way, so they went though the fender well, as detailed in this informative forum thread. There is a small caveat, though: Mark’s JK is a six-speed version. However, if you own an automatic JK, don’t fret. Other members have worked on that solution as well.
As a side note, if you’re curious as to what an EGR valve does, it’s pretty much exactly as it reads. It recirculates the exhaust gas back into the intake. It’s not for burning unburnt fuel, as many would assume, but instead lowers the temperature of the combustion chamber to remove NOx.
Exhaust gas is non-combustible as it is spent fuel and air. The less air in the combustion chamber (because the air is replaced by that non-combustible exhaust), the lower the temperature in the combustion chamber, the more you reduce the NOx content of the exhaust. It’s also why diesels are a pain for US emissions, thanks to its far higher combustion chamber temperatures. But we do see some manufacturers putting EGR valves on them with varied success.
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