High oil consumption. But WHERE is it going?

There is a reason gen2 catalytic converters are so popular, they work very well and cleanly burn off the oil.

Gen3s do the same thing but don't have to be as good at the cat since they recirculate some of it through an egr system your gen2 does not have.

 

Did your MPG go down as oil burn rate went up?

Because a used low mileage Prius engine with warranty from a wrecker costs less that $1000. I'd recommend saving yourself a huge amount of time and just do an engine swap...

There's a guy near you in Oklahoma who puts Gen4 engines in Gen3 Prius in only a day for $1500 in labor and a Gen2 engine is way more simple than what he has to do. So this whole situation could potentially be solved by you in a day once your oil burn rate gets worse...

These two dudes did a Gen2 engine in 6 hours and his engine only cost him $450:

 

What did you uses to do the Piston soak did you uses Berryman's B12? Leave 4 Oz in each Piston for 8 hours and rotate the Pistons 20 times for 3 intervals? Rotating the engine with B-12 in the block is very important to freeing up the sludge.


The main reason for oil burning on well maintained 2nd gen Prius is stuck oil rings. The oil burns off into the exhaust.
Freeing up the oil rings helps.
I did a write up on my experience and I was able to free up the sluddgy rings.


https://r.tapatalk.com/shareLink/topic?url=https://priuschat.com/threads/200k-2009-prius-with-oil-burning-at-1qt-for-1000-miles-highway-and-less-burning-in-stop-and-go.233081/&share_tid=233081&share_fid=1171&share_type=t&link_source=app

SM-A536U ?

 

You're very central to a great number of other regions... The amount of time you spend searching for a good price on an engine to swap will be less than the time you spend rebuilding it.

 

I can think two items. Since the PCV valve is new, are the passages clear?

Before you consider rebuilding or replacing the ICE, have you done a compression test? Or even better a “Cylinder leak down” test?

 

I was burning 1 qt per 1000 miles and drop it down to 1/4 qt after doing a proper Piston soak.. It took 3 different trys and last one worked for me. I'm at 205k now. She stop burning oil for the last 5k. I figured I would need to do another Piston soak every oil change until the suck rings get completely clean. It seems either after the 1st soak the rings become stuck again and that lasted 7k miles. I'm on my second Piston soak and I'm only at 3k and I'm guessing it might be stuck by 7k. Will do a follow up on my next oil change.

SM-A536U ?

 

Man 6 hrs for 2 people who know what they are doing is awesome. I've looked into JDM Engines on ebay, is there any way to request the oes with higher VIN's with updated pistons and rings?

 

Was this a thing with second gen too? With third gen the piston rings started out as "lower tension", then sometime through model year 2014 both the rings and pistons were revised (due to oil consumption reports). I've not heard of a similar scenario with second gen though.

 

Mendel.. No sorry was talking about Gen 3 but I guess I should have written that.

 

JDM engines don't have VINs. VINs are more of a US thing. However most salvage yards remove them from US engines because they allow mileage and stolen car tracking.

Not sure low tension rings were used in the 2004-2009 Prii because they were designed earlier than other 2006 Toyota models which did have poorly designed low tension rings. Various Toyota and Subaru models from 06-15 had problems with them. As I understand it, it is the implementation of low tension rings more than the rings themselves. Gen2s with high miles often burn oil for normal reasons.

Poorly designed low tension pistons and rings have a tendency to allow blowby. You then have contaminated oil lubricating the rings and causing deposits. Toyota endorsed 10,000 mile oil changes with the first two free made things worse. Eventually the deposits get worse and the rings don't seal as well as they used to, allowing more fuel and combustion gasses to enter the crankcase. Then the pcv and egr systems (gen3) picks up more oil and you have carbon everywhere increasing fast. The uber effective catalytic converters prevent white smoke.

 

No issues with Gen2... Bad rings and gasket are just rare as catastrophic engine failure... Of course bad rings up near 400K miles is unavoidable for any gasoline engine.

 

That sure would be cool if true... I know they both have the same oil pan as well... Of course sitting them side by side for lots of measuring to be certain if you're gonna use a Yaris Head, unless the person selling the head has already confirmed...

I'm also working on the theory that 2012 Toyota Corolla has the same fronts seat as a Gen2 Prius... Can anyone confirm that too?

 

You can buy a new short block for about $2200 USD MSRP. There's links on the link below to various dealerships, who "may" sell for less. The ones near me are pretty firm, one about $100 less.


SHORT BLOCK ASSEMBLY. 2008 Toyota Prius Hatchback | Toyota Parts Center Online

 

Under a grand for a new Gen 2 engine? https://www.usapartsonline.com/product-page/2008-toyota-prius-engine-electrical-assist-motor-motor-only?gclid=EAIaIQobChMI7Ma2wJm-_gIVyBXUAR33eQI_EAQYAiABEgLQ8PD_BwE
WOW. Yeah used...maybe with 125K miles

 

That's a pretty impressive warranty too... Of course the picture of what they're selling is a bit off...