2010- Replaced EGR Circuit: Pipe, Valve, & Cooler)

Today I removed and overhauled the entire EGR circuit to my 2010 blue Prius (217,000 miles). Over the last 3 months, this was my 4th EGR circuit procedure, updating all 3x of my Prii [and a fiend's Prius].

MATERIALS
- mail ordered "used" EGR valve; clean and reused EGR cooler and pipe
- cleaning solutions: water, purple degreaser, Easy-off oven cleaner, brake parts cleaner, carburetor cleaner
- pipe cleaning brushes
- E8 socket
- 2x lock washer & M5 0.8 16mm to replace phillips-head bolts with hex-head bolts to EGR valve black cap

EGR PIPE.
- cowel removal is necessary for EGR valve/cooler/pipe; its a simple process & I've don't it +100 times, but personally I'm not a fan of this task
- cleaned with combination of purple degreaser, easy off oven cleaner, brake parts cleaner, pipe cleaning brush
- the bristling pipe cleaning is great for agitation as a bore punch for that gunk removal

EGR VALVE.
- pressure wash cleaned & chemical spray cleaned with carburetor and brake parts cleaner
- Also opened up the black cap & spray cleaned innards
- 2010- 3x EGR Valves, Preventive Maintenance | Page 2 | PriusChat

EGR COOLER
- solid concrete-cooler ridden with thick black carbon soot
- upon initial visual inspection, i could not see through the cooler
- liquid could barely pass from one side in-port to the other side out-port
- car wash pressure washer cleaned
- 2010- Multiple EGR Power Wash Cleaning, No Chemicals/Soap | PriusChat

ROAD TEST.
- ensure you meticulously replug every wire back in place
- <5 minutes on back roads-- confidence up; parlay...
- >15 minute road test smooth and sustained 70mph
- gas pedal throttle is so much more responsive
- i hope this "used" EGR valve lasts >5 years in combination with new oil catch can emplacement.
- An earlier comparable EGR procedure... 2010- EGR System Maintenance | PriusChat