Coolant leaking down on to chassis

[BOLANDMARC]

I have coolant leaking down the Aussie passenger (US drivers) side of the chassis of my 4.5 litre petrol 105 series and also a small amount into the cabin from the duct under the dash.
I know that its a bit vague but looking for some possibilties before ripping everything out, I thought it might be the heater core but more fluid is on the chassis , I can't see any leaks in the engine bay .
thanks for any help

 

[MoJ]

This is a 1fzfe motor, correct? In the states that motor was only common to the 80 series so you're likely to find more info in that section. There's a few common coolant leaks on the 4.5. The first is a small and difficult to locate heater hoses that comes off the US driver side of the block. It's only about 50mm long. It's best seen from underneath. Search "phh" or "pesky heater hose" in the 80 series section for more info. It's also mentioned in the FAQ at the top of that forum page. The second common leak comes from the heater hoses located at the top center of the firewall. They connect to the heater valve. Pretty easy to spot. Since you mentioned coolant in the cabin you might start there. Keep in mind you might not be able to see the leak without the system pressurized.