Hi guys,

I'm a kind of newbie in mechanic but I love my 91 4runner bought few months ago in Australia. I've been driving smoothly with it down the coast. And now i'm in Melbourne and I've just figured out that I've got a serious coolant (green) leak from underneath the body. I've been able to locate the leak I think but I'm not sure of what it is ? (tranny, HG, ...) The thing is it's only leaking while I turn off my engine, so after a little ride at stop it starts leak quick I'd say. I did never notice this before but I knew that I had possibly a leak somewhere as I had to refill a bit of coolant at sometime.
Could you guys would be able to tell me what it is looking from ? and what should I do ? I bought 2x 150g of Bar's Leaks Stop Leak but I've been reading a lot of threads saying that it's kind of crappy, so I'm not sure that is a solution for me. I don't have the money to do some hard repairs so I'm seeking for a short term solution to stop the leak.
As additionals info this is a 1991 V6 3.0L TOYOTA 4 RUNNER 3VZE engine that has been rebuilt in 2007, running on 327000k but rebuilt 120 000kms ago, I have no overheat problem (never been above the half of the indicator), spark plugs done 3 months ago, fuel, air & oil filter donne 6000kms ago, running great except a lost of power in hills, have to down shift in 3rd gear but I've got a roof rack and the car is overloaded as I'm traveling all around.
Need help to identify if this leak has to be taken seriously.
Thanks in advance for your help and comments.
Cheers.
Thomas.

Here is some pics taken from the underneath body :

 

it looks like your rear heater is leaking either the lines or the heater core i have never personally had a rig wth rear heat but a friend did and thats what his did

 

That was the last place my 90 v6 showed a leak. It was the intake manifold gasket leaking on mine. Maybe yours is something else but thats where mine was leaking.

 

same thing here. check the coolant lines near the center of the firewall. probably just an old hose or loose clamp