Kohler lifter replacement
I have a Kohler engine cv16S spec 43526. It has hydraulic lifters. Last year I could hear valve tappet noises. This year, at start up, it was much louder, so much so that I did not feel comfortable running it. When I pulled the valve cover, one lifter seems bad - it does not keep the rocker arm tight. The engine has less than 200 hours on it, no other problems seen.
I have ordered two lifters and gaskets. (Thank you Kohler for not making the hole in the head large enough to pull the lifter without removing the head). The lifters came with Thixotropic camshaft lube. What is this for and where and how much should I use? Other than making sure the lifters were filled with oil (which the service manual details), is there anything else I should be doing?