I wouldn't play around to much with the timing chain issue. I would replace both chains and the guides. I waited to long, and after the chain dug into the guides I ended up having to re-build the engine. If you hear a clanking noise when you first crank it, your to late. I wouldn't say it was an easy job to do, but well worth the $125 for the timing kit and another $25 for the BSE kit. A lot cheaper than the $600+ I spent on a rebuild.