2010 Basic Tune-up Maintenance @298,000 miles

You have a lot of work on your hands. Bet the cooler is clogged. Is the had gasket gone????

 

Assuming @ASRDogman means EGR cooler, I'd second that. And the EGR passages in intake manifold, at each port.

 

What about the had gasket?

 

That's 1000 more miles than @danlatu 's rebuild IIRC.

 

Sad to see such neglect.

Clean up the EGR cooler/valve, and hope for the best.

 

Be careful with the ATF.
Your Prius doesn't have a "transaxle" per-se but rather has a "power split" device.
The motor-generators have stator windings that can be damaged by funky additives and (maybe) non-oem fluids.

You're "probably" OK with the Valvoline, and you're going to be fighting much bigger problems pretty soon anyway, but I'd probably put the Yota brand in myself.
THEY even call it ATF.

Good Luck with the car!

 

Does anyone know the purpose of the extra screen attached to the Throttle Body gasket?


iPhone ?

 

Yeah this has come up before. I believe something to do with cold weather operation, the screen breaks up the air flow, or somehow reduces the chance of ice forming in the throttle body??

Just so everyone's not craning their necks, nothing helpful in the description:

 

Thanks!


iPhone ?

 

The screen might be electrically heated in cold climes? And if the electrical connection is not present, it's useless?

Throttle Body Screen Delete? | Toyota Nation Forum

 

What did you pay for the egr cooler?
You should have checked online for them. I found one for $53, free shipping.
It was fairly clean, so I pressure washed it then used oven cleaner a few times
pressure washing in between so it was shinny. It's on the car now.

 

That's a great price for "new?" cooler and EGR valve.
You really only need one though. Because you can just clean the one you take off.
Soak it for days in white vinegar or gunk or oven cleaner. The pressure washer would
probably clear it out, unless it's backed to the point of being hard. Then you'll need the
pressure washer before and after the oven cleaner.

I had noticed I wasn't getting the response I had gotten, and some loss of power.
It was earlier than I had planned to do the cooler. But I was having some of the symptoms
most others said before them blew the head gasket. Mine was almost completely clogged.
So I put my replacement one in which saved me a LOT of time.
I pressure washed the original one and it cleared out. Before I do the egr system again I will
use the oven cleaner.

I notice a huge improvement after clean the egr system including the intake manifold.
It really needed to be done!

I was driving 70+mph on the highway, and a lot faster in the city. I think that's why it clogged so much
in 60,000 miles versus partially clogged at 125,000 the first time.