12' F150 coolant leak. 95k KM
 

Hey yall. Have been experiencing a slow coolant leak, cannot trace the cause as I cannot see where the leak is coming from. Definitely not coming from the rad. Seems to be leaking from somewhere above the front differential case, as it trickles down and drips from the dif. I had the truck lifted and still I could not find the location of the leak. Any info would be appreciated. Thanks guys. cheers.


Adrian

The better way to do this is to pressure test the cooling system with a cooling system pressure tester, both when cold and warm. Loose hose clamps can leak only when cold and some other leaks show up after warm up.

Hmm, I had my mechanic do a pressure test when the vehicle was warm. It did not lose pressure, even after about 30 minutes. I should try to do another pressure test when the vehicle is cold, because it seems when the truck sits for a day or two, that's when the drip drip starts. Thanks for the reply.

So it seems I've found the source of the leak. It appears to be coming from a junction point between the rad and the water pump, just below the air box. When I jiggle the connection point, some fluid visibly leaks out. If anyone knows a part number, that would be great. It seems easily accessible once the air box is removed. I will include some pictures. Thanks again.

Hey so I picked up the part from Ford today, $100 in Canada. IM sure you'd be able to find it cheaper in the States.


Part# DR3Z-8566-B