Jeep Grand Cherokee Petrol Oil leak

How to confirm the oil leak in the valley of the V6 petrol Jeep grand Cherokee.

Confirming the oil cooler leaking oil on the V6 Petrol 3.6 Jeep Grand Cherokee. This fills the valley with oil, which then leaks over the bel housing and under the transmission sump. May people replace rear main oil seals or automatic transmission pan gaskets when its this cooler that is the fault.

Of Note this is an aftermarket oil cooler fitted which has failed, not the OEM product.

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