I have a 2002 Toyota Corolla (1zz-fe engine) and recently noticed an important coolant leak, dripping from under the car, apparently from the oil pan. I took a closer look and was able to identify that the coolant is coming from the very bottom of the timing chain cover. It is leaking through one of the bolts, or possibly through the timing chain cover gasket. It is right next to the crankshaft pulley.
I saw posts suggesting to check the water pump. I changed the o-ring but it did not solve the issue.
Does somebody know what could be going wrong?
I am not even sure there should be coolant behind the timing chain cover in the first place. Do I need to replace the timing chain cover gasket, or to first find where this coolant is coming from?