Just wanted to add a few things about replacing the radiator for a GS 430.

Someone said to bleed the fluid with the radiator cap off. I tried that and it seemed like the coolant wasn't flowing enough for a good bleed even after getting up to temp, so I revved the engine and that worked alright, but it spewed coolant everywhere and made a mess. Then, after that, when I tried again without revving, it would periodically gush coolant out. The coolant didn't just burp air calmly. So, bleeding with the cap off isn't such a good idea. I would suggest just bleeding over a few days and maybe park uphill and rev (with the cap on, of course) to get any bubbles to flow out. Then, just check the coolant level every time before you go driving when the coolant has cooled.

Also, instead of removing the radiator with the fan assembly attached, it's easier to remove the fan assembly before removing the radiator and letting it stay behind as you lift-out the rad because disconnecting the fan plugs is a real ***** and not worth breaking them.

Oh, and check that the hose fittings for the oil hoses are tight. One of mine was quite loose.

Other than that, it was a piece of cake. Good luck!

aj