OK bit of an update on the supra....
After doing the timing belt and harmonic balancer, a problem arose with water leaking out somewhere from the cooling system near the radiator. It took me a few days to find where it was actually leaking from...at first i thought it was the radiator cap itself that was fuxxored. So i got a replacement one from autobarn, exactly the same type that was on the original radiator. Unfortunately the overflow bottle was still getting emptied every time i drove it for more than 30mins. I decided to follow where the water was coming from, and it still seemed to be from around the overflow outlet near the cap. I tried to repair the cracked overflow pipe i found....and was successful. However it was STILL leaking.....i then investigated a little further, to find that the top plastic tank of the radiator had a 4 inch hairline crack in it....allowing the coolant out at high pressure, but leaving no trace of water when it was cooling down.
Cue more decision making.....i could get the radiator top tank replaced and put the original one back in again. However i didnt know what the bottom tank was like, and i really didnt want to take the chance of it developing a crack as well. So i began searching for a replacement radiator....much to my amazement, Ebay actually had full alloy radiators for the JZA70 as a direct fit shipped from LA. $360 for one to be delivered to my door....i couldnt really go wrong. I ordered it on sunday the 13th, it was in the country on the friday and i received it on monday the 21st.....thats what i call quick delivery.
Installed it on thursday night....and heres the pics! :)
All done and hopefully wont give me a problem again. :P