Intake manifold replacement?

How about cleaning it thoroughly then installing an oil catch can.

Oil Catch Can, Eliminate that knock! | PriusChat

 

Did you just clean the intake manifold, or the whole egr circuit?

If you didn’t get the egr cooler, that’s probably the cause of the behavior soon after removing some of the restriction.

 

I would second to reclean the intake manifold and install an Oil Catch Can. Also check the current condition of the EGR pipe (the tube between EGR valve and intake manifold), to get some idea of the EGR Valve/Cooler's condition.

Try some protracted Oxi-Clean solution soaks? Pipe cleaners are probably best tool for ensuring free-and-open EGR passages, the little passageways at each port.

Intake manifold removal for cleaning is relatively easy, once you've done it once.

 

Checking condition of the EGR pipe should give you some idea of what the rest is like. With only 13K since last cleaning, should be ok. That partially hinges though, on how thorough your last clean was. Oxi-Clean solution soaks, and/or pressure washer blast, will get the EGR cooler like new.

 

WOW.

I've never known anyone with any car just to replace a stock intake manifold. Performance for hot-rod or racing ... yeah sure; but never stock for stock.

 

More like $200?

Intake Manifold - Toyota (17120-37054) | Toyota Parts

You do get the superseded part, has revised EGR passages I believe.

Still, unless it's cracked or something, I would just clean.

 

Part number per above link?

 

I kept forgetting to ask: what you're consumption rate?

 

Oven Cleaner does a faster and easier job on the build up. With a pressure washer cleaning.

 

I cleaned 2 intake manifolds at last month Prius meetup. What’s even more impressive is that raytheeagle cleaned and shined 3 EGR coolers in 15 min, he finished before I even got half of the 1st cooler cleaned.

 

Not just wonderful, it works.

We had a nice assembly line going.

Effective.