Yes I know, I can search the forum, but I have and reading through several threads I could not find a clear consensus or really much info on what brands to use for the belt tensioner and water pump.

This car has almost 200K on it

Belt tensioner:
My car has a Febi belt tensioner which was probably replaced not too long ago (but not sure of that) but seems to have failed. I cannot adjust the slack out of the belt with the adjustment rod which I just replaced.

I know these Febi tensioners are the cheapest option besides like Trucktec or Uro but it seems to me that they are probably not the best quality. I know Febi sometimes has different suppliers for the same part, so I really don't want to gamble with them but if they are fine please let me know, i have no clue how old the one is on my car.

I have seen two other brands which sound promising and have been referenced before:

Gates, apparently uses an INA pulley, $110-$140, may be a reboxed part

Litens, supposedly German made, uses an INA or LUK pulley, $150


Water pump:
I also found a Gates Water pump on ebay for $55 that is discounted for not having a box, and it again may be a reboxed part but does anyone know if it is a quality part? I know Gates belts and hoses are among the best, but have no clue on their other products. I am not sure if my water pump needs replacement yet but it looks to be original.

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.