Hi, thanks for the replies,
I'm not sure what the engine was exactly. The place that sold me said it was a normal UK spec one but when it arrived it was obviously a Japanese one - covered in japanese writing in chalk! and with a manifold nothing like the old one. I had an op on my knee and didn't get round to unwrapping the new engine until after the guarantee had run out! Sounds like I should just have sold it on and got another standard block! I'll try and get the engine number off it next time I go over to the workshop....
Anyway what I've done is to take the manifold, rocker covers, flywheel and thermostat housing from the original engine and put them on the 'ZE plus I've changed over a few oddments like wiring brackets which didn't fit, I kept the new engine's injectors though as they look newer! In the future I may try and get hold of a turbo and the right ECU and do a full upgrade, but for now I just need to keep on the road - my 323F has absolutely no chance of passing its MOT next week - It farts huge clouds of blue smoke - it still goes well enough though...Also I can't wait to get back in the MX-6
I've no idea how well this will run in practice - i.e. I guess the compression etc is a bit different. Like I say it sounds good and idles and revs nicely just hope it will pass emissions tests!
When I say fans kick in early...start engine. Leave on slow idle for about 1 minute block is still cool, pipes still cool temp guage not moved yet but the fans start up at full blast. Previously these would only start up when the engine was up to full speed. Left to itself the engine still warms up but not to it's normal point. It used to get to dead centre on the guage, now it just gets to about 1/3.
I'm guessing this is due to the second sensor being to turn the fan on? Or was one of the sensors really redundant?
Like I say I'm really learning as I go along - I'm only really used to working with much older (simpler) machinery - that doesn't need to pass any emissions tests!