The belt that operates the alternator on my Thiokol 601 with a Ford 223 industrial broke. This motor has two belts, the outer belt to the water pump. the inner to the alternator. Since I have to remove the water pump belt to install the alternator pump I've decided I might as well replace both. I can do the alternator belt fairly easy, but the water pump belt has me stumped. As you can imagine I'm working in very tight quarters. How do I relieve tension on the water pump belt? I can't see a tensioner. I tried to find a diagram online but they are all for modern serpentine belts.