For the EGR cooler I'd suggest a caustic cleaner. Being stainless steel, and having such a convoluted interior, caustics are the go-to. Oxi-Clean Versatile Stain Remover is effective, and safe for skin. Not sure if it'd be available in UK though. Something that will be very effective, but needs caution, is a lye solution.
After looking at about 10-15 different threads about deleting the EGR and finally figuring everything out, I decided to put together this "EGR Delete" How To so the next guy doesn't have to do as much research. All this is good for is cleaning up your engine compartment and getting the...
The EGR valve is much easier to remove compared to the EGR cooler. Next time I swap EGR coolers I'll try an Oxi-clean only cleaning. Oxi-clean does such a tremendous job that I wouldn't be surprised if it grabs all the carbon. That would be a huge time saver compared to drilling around the cooling fins.
EGR Valve Position/Duty Cycle: At idle and low load: The EGR valve is normally partially open, allowing a small amount of exhaust gas to recirculate into the intake manifold to lower combustion temperatures and reduce the production of nitrogen oxides (NOx). You may see a non-zero percentage or a value indicating that the valve is partially open.
An egr that is causing sluggish slow speed operation is stuck open without egr cooler clogging. Normally the egr valve is closed in low speed operation. The "Car Care Nut" youtube channel has a video (EGR) with a quick way to check for this. However this is rare compared to egr cooler clogging. Cleaning the cooler is a labor intensive job.
I recently completed my engine build and deleted my EGR in the process to make clearance for the return fuel system using a 2.9L Whipple. The EGR is in the way of the rear fuel fitting if you use aftermarket fuel rails and fuel line, so I deleted it and have received a lot of question on how to...
The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during EGR pipe with cooler sub-assembly removal/installation are shown below.
The EGR components definitively should be cleaned, after the head gasket is sorted. Replacement of the EGR components (intake manifold and EGR pipe/valve/cooler, and all associated gaskets) will certainly be effective, if you don’t mind spending over a grand.
REMOVE EGR COOLER SUB-ASSEMBLY Disconnect the connector, wire harness clamp and 4 water hoses. Remove the 4 nuts and bolt. Text in Illustration *1 Stud Bolt and Nut Using an E8 "TORX" wrench, remove the 4 stud bolts and EGR valve with cooler assembly. Remove the gasket. Remove the 2 nuts, EGR cooler sub-assembly and gasket.
