2ZR-FE pdf diagram info

[10vibe]

This is from the physics department of USC. I do not know how accurate it is. I am amazed at a couple details, such as it says it has hydraulic valve lash adjusters and therefore no need for valve clearance adjustments. The use of plastic region tightening bolts on the connecting rods is very interesting. I also did not realize that it had a stainless steel exhaust manifold or that the camshaft is made up of a cast iron alloy. I need to read more about the Spiny liner of the bore and many other things. Enjoy! Somebody should probably download this to this site if that is possible.
http://physics.usc.edu/Undergraduate/te ... rfeeng.pdf" onclick="window.open(this.href);return false;

[10vibe]

I am surprised nobody finds that roller rocker arms with built-in needle bearings and hydraulic valve lifters is not interesting compared to shim and buckets!
Technically they are hydraulic valve lash adjusters, and that is what you would check and replace if necessary. I think Toyota's 3.5 liter has a similar design. I wonder if the new 2.5 liter is like this. Toyota's 1.8 Atkinson cycle engine is probably like this also.
The 2zz-ge had rocker arms with the lift change mechanism (slipper follower controlled by ecu and oil pressure), but no hydraulic valve lash adjuster, just mechanical shim and bucket type (or lash cap for adjustment) design. Someone please correct me if wrong. I will have to verify the actual design of the 1zz-fe, but always assumed it was mechanical shim and bucket type, without rockers, using varying thickness of lifters instead of actual shims, and camshaft removal being necessary. There might of been evolutionary changes throughout the years that differs from my understanding.

This is what they look like, especially when something goes wrong. Possible valve float (or is it rocker arm float) causing the rocker arms to pop off because of sudden rpm spike due to a missed shift or accidental downshift.
http://www.youtube.com/watch?v=BLdMWkzSwXk" onclick="window.open(this.href);return false;
Detroit auto show in 2010 with some engine cutaways.
http://hiwaay.net/~bzwilson/prius/pri_2010.html" onclick="window.open(this.href);return false;

1zz-fe valve clearance manual:
http://www.madstyle1972.com/Repair/14/2 ... 040001.pdf" onclick="window.open(this.href);return false;
1zzfe and 2zzge engine development:
http://www.mr2roc.org/misc/referencelib ... igndoc.pdf" onclick="window.open(this.href);return false;
http://www.2zzge.com/library/2zzge-engine.pdf" onclick="window.open(this.href);return false;
http://www.sandsmuseum.com/cars/elise/t ... oyota.html" onclick="window.open(this.href);return false;
http://www.mr2.com/files/mr2/techinfo/R ... S2zz-2.pdf" onclick="window.open(this.href);return false;
http://www.newcelica.org/forums/showthread.php?t=192981" onclick="window.open(this.href);return false;
section 8 Toyota technical training:
http://web.newsguy.com/gtfour/misc/Chap ... d_acis.pdf" onclick="window.open(this.href);return false;
Awesome links found while looking for 2zz-ge lift problems:
http://www.diymytoyota.com/corolla/2zz- ... eshooting/" onclick="window.open(this.href);return false;
http://www.newcelica.org/forums/showthread.php?t=250432" onclick="window.open(this.href);return false;