Coolant leak, what gasket is this?

[jollyjerry]

I suspected my water pump was leaking because I found coolant under the truck, but when I crawled under the front, I saw the leak was lower than the pump at this seal. What am I looking at and how do I replace that gasket?

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[michael hurd]

That's the oil pan gasket, that does not contain coolant. Coolant is likely coming from the weep hole behind the pulley, and collecting at the lowest point before dripping off.

 

[jollyjerry]

Hmm, I expected to see more coolant splashed around because of the weep hole. I'll try to get a better look or looks for some residue tomorrow morning after I drive it around.

 

[Ironhead]

Yeah, leaks can be tricky to track down, but I'd agree that the leak is most likely from the water pump, then running down the front of the block.