hello every. i just pick up a sweet 91 k100rs. know that make 12 bmw bikes i have lol. ok the water pump oil seal is leaking. looks easy to change. is there any thing i need to watch out for.i picked up a rebuild kit. oil seals,water pump fan and a spacer. any other parts. i know there is a by pace hole on the housing i need to watch out for with the rtv sealent. Im more of a /2 and R bike mechanic.