midnightmike
+1y
i done valve seals before with the head on the truck, personally, its not hard, but time consuming, and tedious, i bought a compression tester, and used the line from that, with a fitting to plug in the air compressor line, and theres a tool for it which looks like a pry bar to pop off the springs and clips, then replace the seal and reverse the process, and only do one cylnder at a time, that includes spark plugs
just be patient and you can do it, if you drop a valve then the head is comming off
read up on it as much as you can, look at, give your self a game plan and you'll be able to do it