I recently used my truck to pull an equipment trailer and tractor on a couple hour trip. On the way back I stopped and noticed it was dripping coolant. Bought some at the gas station and filled the overflow tank between the sight glasses. Within the next 2 hours it had leaked all of that out. The truck never ran hot though. When I got home and had time to look at it, I discovered that on the rear of the water pump housing, there is a tiny hairline crack. I feel like this may have developed at least 3 years ago and just now got worse with me actually working the truck some. If I think back a few years to when the winter temps dipped into the mid teens, I remember it having a very slow drip. At the time I thought it might have been a loose hose. So now I need to replace or repair the water pump. Questions for those of you who have already:
- Any particular brand that I should stay away from? I see I can get one off eBay for under $120 including shipping. Looks like a no-name replacement.
- Has anyone disassembled the actual water pump, taken the rear of the case off? I need to check it with a magnet to see if it's steel or cast iron. If it's mild steel or aluminum then I think it could be TIG welded. If it's cast iron, maybe brazed?
- Looks like I would need to remove the fan blade in order to replace the water pump belt? I find it a little interesting that the alternator has a double belt and the water pump only a single. Seems you would want the redundancy there too.