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Discussion Starter #1 (Edited)
Toyota 2ZZ-GE: Heavy blow by

Hi everyone !

Sadly, I don't own a Lotus (yet!) but still have the same engine/transmission as an S2 Elise in my car :p

Not a lot of people in Toyota community take theirs Toyota's to the track so that's why I'm asking here. (If for whatever reason my post is non-related non-approved or whatever admin or mods pm me !)

I currently own a 2005 Toyota Corolla XRS, which have the 2ZZ-GE and the 6 speed C60 transmission from factory. It's slowly progressing to a road racing ready car.

DSC_0228RR by Jean-Sébastien Girouard, on Flickr

So my problem is: The 2ZZ is suffering from heavy blow by, rings seem to be shots but weirdly compression test and leak test are good. Plus, results on the dyno confirm me that this engine still have some heart...

Mods list (engine only):
- DC Sport short ram
- StreetWrerks ported intake manifold & 69MM throttle body
- Hondata intake manifold gasket
- PPE headers
- PPE midpipe
- ECU reflashed (Lift @ 5800RPM, cutoff @ 8500RPM)

Condition: First when I bought the car, I've noticed that the dip stick popped a bit when I drive it for a while over 6000RPM. If I drive "normally" the dip stick stay right were it should. I made all the mods, made a track day and noticed that the dip stick popped each track session. I've installed a catch can vented to atmosphere, did an other track day and well... got a oil mess (yay free anti-rust protection) all over my engine bay plus the dip stick was still popping. I can collect about 125ML of oil on each session (15 min). Oh and I did replaced the dip stick O ring.

Did some tests on the engine, I've check the compression/cylinder leakage and the results were not bad. 180PSI on all 4 pistons and less then 5% of cylinder leakage. From those tests, engine is still good. Did other track days, each time my dip stick popped and my vented atmosphere catch can spilled oil everywhere no maters where I put the output tube :mad:

While the engine is still running, I give it a go on the dyno and even if the tune need a major workover I've managed to get 181 WHP on a Mustang dyno. A stock XRS is about 155WHP on this exact dyno. (dyno sheet is attached)

Did an other track day yesterday and the engine is still pulling great, I did even beat my personal best time !

I'm pretty sure the rings are shots, in regular driving they still do the job but when heating up, the let compression escape in the oil pan.

Just wondering if someone experienced the same problem !

Thanks :)
 

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Discussion Starter #2
The car is now in winter storage and the engine is still running great after this season !

Like I told earlier, is most likely that the rings are shots. They work OK in normal condition, they open up in extended high temp/high revolution situation.
 

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Check your PCV valve. It may be blocked or not functioning properly. A new one or a set of catch cans might solve your oil consumption problem.
 

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Just watched this... Looks like a fun car!
 

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https://www.youtube.com/watch?v=n9K7pSJ9LEc

Just watched this... Looks like a fun car!
It is ! I actually have 2 XRS, one for daily drive that is 100% stock and the silver one for track days.

Currently I got a catch can installed on the breather tube and the PCV is rooted like OEM. The PCV work fine, I've cleaned it but it was already in good shape. Didn't track test this system but anyway I'm pretty sure the rings are shots, I'll use this engine as long as I can. I already got a low millage 2ZZ waiting :D

Like I've written I've used to have a full open catch can system but the engine produce too much oil vapor that It spilled oil everywhere lol.

Here a quick inboard video inside the race Corolla!

 
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