Customer called complaining of water in the engine oil on a D6D. Long story short, his water pump started leaking at the weep hole and they drove a freeze plug into it to stop the leak (we drilled the hole to pull the plug back out.) It definitely stopped the leak and also melted the grommets in the head when they didn't see the water pump was transferring the cooling system into the oil pan. Maybe they should have checked the oil more often, I dunno.

On a related note, always remember to check weep holes for dirt dobber nests.
On a related note, always remember to check weep holes for dirt dobber nests.
Leaking water pump solved
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