[mhd]

My egr valve has significant build up of charbon. I have an inexpensive Harbor Freight portable blaster ($29) and a bag of grounded walnut shell. I gave it a try: within 10 minutes I get both large and small bores smooth and squeaky.

After I finished, I was surprised to find a few posts claims to use soda blasting to clean it. The rationale behind it is to protect electronic part.

I never though clean the internal bore could damage the electronic part. Where is the electronic part inside the bores?

[Mik325tds]

I don't see an issue with using walnut shells instead of soda. It was just what I had available at the time and I didn't want to waste the walnut shells on the EGR.

[BB_cuda]

Electronics are inside black plastic enclosure only. You’re fine. I used carb cleaner and a old toothbrush relegated to garage duty. EGR stays squeaky clean now with cooler gone bye bye.

[matt23462]

There is no electronics in the black plastic enclosure

[mhd]

Originally Posted by matt23462

There is no electronics in the black plastic enclosure

Then where are the electronics?