1999 X308 coolant leak

1999 X308 coolant leak.

I have a bad coolant leak that appears to originate from behind the accessory drive-belt crankshaft pulley. I am unable to identify the exact source. Any ideas?

Ian

Could be the water pump as hard to see under that. You may be able to with a mirror or feel it wet under the pulley.
Otherwise sources might be:

drip from split cross pipe which has the temp sensor in. These crack and could drip down onto the belt

Loose or corroded hose clip on the short rubber hose to the thermostat tower

Leak from thermostat tower base

Leak from thermostat cover gasket

Try looking for dried out coolant tracks with a bright light and a mirror

I’d lay my last penny that the culprit is the dreaded “valley” hose.