Anyone have an idea how long it would take for rust to progress to what's on this head bolt? It always had coolant in the engine.
Pic is now on. I think.
I'm looking at this bolt and thinking it took months, or longer to get that rusty. And, if so, then the blown head gasket I have really started a long time ago. I thought if someone has seen similar rusted bolts, they may have an idea how long it takes to get this way.