Is an E8 wrench necessary to clean the EGR?

1/4 drive socket set 10mm for most part . I trade a few studs on cooler for bolts on the install . Personally leave lower nut on cooler off forever because removal will be 60 K for life or destruction 60 120 180 and so on

 

You have to remove “more than one” stud, using an E8 Torx socket. Also, when cleaning the intake manifold, it’s prudent to remove the two throttle body hold down studs, just to avoid damaging them (or the manifold) during cleaning. E6 Torx socket needed for that.

A 1/4” drive ratchet wrench is needed too, and maybe an extension or two.

have you read the required tool list, in top link in my signature? (On a phone turn it landscape to see signatures.)

BTW, appreciate you’re location is somewhat remote; can you get mail order, Amazon, AliExpress or whatever?

 

If you're in the United States right now Lowe's has the quarter inch drive Cobalt and a blue box socket set for 1999 normally like $40 It has the torx bits the keystone flat screwdriver bits the three Phillips some torque security quarter inch drive that's going to cover you through 14 mm an extension a flex joint a short extension and a manual quarter inch drive screwdriver handle that's a very good deal for the 90 tooth setup. I would highly recommend it for the weekend warriors It's a decent set

 

He’s in Fiji, Tom.

(If you’re on a phone turn it landscape to see more info in the avatar)

 

This may help:

Professional EGR Cleaning Resources | Page 9 | PriusChat