yes the mess would be a problem. this type of fix only works if you have not let it get to the point where you have a big mess or need to fill weld a hole in your timing cover. when i did my first one i had to pull the cover because the chain wore a little hole through the cover and oil and water mixed. now i know what to look and listen for... my uncle is the one who came up with the idea. he has now done a few jobs with out taking off the cover. by bending a couple of wrenches and grinding them thinner he has made a set of tools for getting in the small space. doing this a few times he has got kinda good at it. This way thought is more for those who want to get back on the road fast and dont care too much about a few frags of plastic that may not have made it out (in my opinion). He does this for customers that can't afford the full blown take down. i personaly would pull the cover and get a good look at it if i have to do it again and have the time. but the ones that he did with his modified tools are still running and doing fine. the first one he did almost 10 years ago! I'm not sure if this would work for a double chain though, seems like that may be harder to get out with the limited space. has not come up though, maybe someone else can figure that one out. <img src="/forums/images/graemlins/confused.gif" alt="" />