Follow along as I clean the Egr Valve on this 6.7 Cummins diesel engine. In this video, you will see me using my @Gunk throttle body and air intake cleaner. As you’ll notice in the video, not only did this cleaner cut through the carbon build up on the egr valve no problem, but it also lubricates the shaft to help it move freely. Gunk is my got to brand for cleaners and degreasers. Next, I will be using this product as well as other Gunk products to clean the rest of the Egr/ intake components,