Info - What Does Water Damage In Engine Look Like?
Topic: So, what is a sign of water damage in an engine - especially if there isn't any rust?
The most obvious is damage to the upper and lower connecting rod pins (and bearings). It's kinda hard to see the lower rod bearings/pins without a crank teardown, but looking at the parts you get back from the rebuilder (Northern Crankshafts) it becomes clear. Here's a few pics to illustrate:
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