A 2.3 chain tensioner has a ratchet in it. Unlike the V8 tensioner that are
just oil pressure controlled. As a 2.3 chain stretches, the tensioner comes
out to take up the slack but it cannot retract. When the tensioner reaches
the end of its clicks, it can extend and retract like a V8 tensioner. BUT at
this point your chain has stretched to its breaking point. You need to
replace the chain very soon!
To replace the tensioner, you will need a couple of big allen sockets. You
remove the center allen plug. Remove the spring. Remove the housing from the
timing cover. Pull the plunger out. To install: screw the housing into the
cover tight. Push the plunger in [the ratchet is the spring ring on the butt
end]. Install the spring. Put the end plug on the allen socket and PUSH HARD
to compress the spring AND turn the allen to start the threads. Have fun!