Hi, have not posted here for quite awhile though I've been lurking. My 90 4runner has been stellar for so long I've forgotten about repairs.

So last weekend I had the cooling system flushed/filled with toy coolant, today I noticed a leak down the rear side of the engine. I crawled under there and saw what looks like a frost plug just above where the exhaust takes a bend and some steaming around the area.

After searching here a bit I read there's a small 3/8 hose in the vicinity that can also leak, is this true? Also I can't find any doc's on frost plug locations on this block, so I'm just guessing that's what it is, looks like the ones on a 350 anyway. I understand the only way to fix these is to drop the tranny?

 

there are a bunch of coolant hoses on the top rear of the motor. let it all dry and start looking from the top, use a mirror to see behind and you should be able to locate the source of the leak.