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Is there a coolant drainplug on this engine? I want to replace coolant. Emptying the rad only drains about 3 L or so.

Can anybody tell me if the TC lock-up on the A344 'box is controlled by the electronic control unit or is it locked purely mecahnically?

How crucial are the lambda (oxygen) sensor and air temp sensor to the performance of a 1UZ? When using OEM wiring and EMU it is probably not even possible to run the engine without those, but with an aftermarket EMU there's a choice. My belief is that the engine was designed to work with those...

I had some damage done to my 3.4 V6 in January this year. Had to either rebuild or replace the 5VZ-FE motor. As rebuilding would cost abot R60k and the replacement with a Jap import of the same type R20k, I have just about decided to go that route, when someone asked "Why not the 1UZ?" Darn! So...

Does anybody have any idea where I can see (prefrrably download) torque curves/graphs of UZ-series engines - dead standard? My primary interest is as in my thread header. I want to see at which revs my torque output (engine being installed in my Prado 90) peaks, and stuff like that.