What's on the back of engine, above oil pan? (Wet!)

@MrPete

Is your engine from a 4th gen engine? I see the black bolt in the back by the oil pressure sensor.

 

Final year for a Gen 3 block was 2017 for Prius V and CT200h..and the piston rings were technically changed February 2014, for the 14.5 cars.

 

They solved it by finally acknowledging the low-friction piston rings they purposely spec'd, were an abysmal failure.

Oh, and issued a TSB that says they'll replace pistons/rings on pre-revision Prius, IF it's burning more than a quart every 1100~1300 miles, AND has under 60k miles on the odometer.

What a nice lot, always in our corner.

 

Not really if you put it together as plug and play for the Gen 3. JDM or Wrecking yard Gen 4, trying to adapt EGR and water lines..yes.

 

Recently they started offering a rebuilt gen4 engine for retrofit into a gen3 car. They install a gen3 head between the gen4 block and cam assembly so that the gen3 egr and water lines fit.

 

that’s pretty smart. Less modification on the coolant hoses and such. I wonder if the camshafts housing parts different from the gen4. If not, I bet reusing the gen3 head and egr is easier to plug and play.

 

Yes, we started doing this about 5 years ago with Great success from our Test subjects that we trusted for honest feedback. The game changer was modifying the Felpro Headgasket to make it work effortlessly with the Gen 4 waterpump

 

On my v it was the timing chain cover sealant. At first it just collected on the engine and the under cover. I changed the oil pressure switch and had a new tensioner and tensioner gasket installed with no results.

Eventually it was cleaned up enough to capture the leak location:



After driving a while it was all over the oil pressure switch, that general area and some blew around that side of the engine.

 

yeah.... Classic older style pre-2.5L engines timing cover. They almost always leak at the point where the head meet the cradle and timing cover. 3 surfaces rendezvous where oil allowed to pass.
Mine leaking like that too since the standard waranty expired at 60k miles.

 

Exactly what I mentioned, I think Pete was thinking FULL Gen 4 right out of the donor car, yes that's more tricky and moving parts.

 

You wouldn't be able to have a plastic Gen 4 valve cover on a Gen 3 cam cradle.