The Lotus Grand Tourers

Can anyone tell me if the cabin heater return hose is the best one to disconnect to drain coolant out of the bottom half of the engine block or is there better hose to disconnect.

TIA Graham

On the nearside (left) of the block (behind the exhaust) there is a brass drain plug to do just that. It's a 1" NPT thread. They're a real bugger to get out - usually because no-one has bothered to do it before. If it doesn't come out without a 2 metre breaker-bar leave it in and pull the lowest hose

Pete

I was thinking since the bottom hose looks like it might be a bugger to get back on. isn't the rad drain plug lower than that hose anyway . SO it will drain just as well from there??

When I flush out the coolant I disconnect the bottom hose where it joins the radiator