Water pump?? The only thing in belt train that could do permanent damage, all other things would just lead to inconvenience. Overheating could toast your ride. There's another issue that I have never heard anyone who sells these parts address. Engine longevity. I don't know about the six, but the zetec damper is just that, a damper. It has the hub construction with rubber ring and outside iron ring. That part is made that way for a reason, just tell me how many millions Ford could have saved by merely making a single part instead of that assembly. It damps out harmonic vibration from the crank. I remember people taking this same idea to American V-8s only to watch as crankshaft breakage reared it's ugly head. Note that as those engines got more and more powerful, and revved higher and higher, that crankshaft dampers got BIGGER. The zetec is a four cylinder, the design of which lends itself even more to crank torsional vibrations. Note also that earlier low HP producing Ford fours used cranks that were not fully counterweighted, which allows for more of that type vibration. Many also had solid crank hubs with no rubber damper. Problems did not happen because engines made no power. A 100 HP 4 cyl. motor has a 25 HP "hit" everytime a cylinder goes off, how about a 200 HP engine? The crank will twist more from that increased power. Using cast iron for crank can help/hurt, cast iron absorbs some torsional twist but sacrifices itself in the long run doing so. Forged steel shaft stronger, but those things echo the vibrations up and down their length, that's why there for awhile all the Nascar boys were running cast cranks, the reduction in vibration was worth 20 HP, so the word was. As engine starts making more specific HP for its' size, those vibrations go up. Zetec motor makes more power per cubic inch and crank much closer to a fully counterweighted type. Now has damper too. I have personally seen people yank damper in favor of a small hub to increase power on big motors only to have the motor begin shelling out bearings or outright blow up. Now I'm not saying that's gonna happen on a small stock motor, but I do believe that there will be some kind of price to be paid. Maybe the engine will just wear out faster, I don't know. I love the basic idea, used to have underdrive pulley on my old V-8 AMX, but that one kept the damper, pulley bolted to the front of it. On those cars it was worth 20 HP at 7000 rpm, WATERPUMP ALONE. I also used the much bigger damper from a 390 on a 304, since motor going to 7500+ rpm. My point is this, the makers of those parts are absolutely quiet on this subject, at least I've never heard one guarantee that his part will not break your engine or wear it out faster.
