I did a top end rebuild tonight and I want to make sure I put the exhaust cam and timing chain back together properly. Here is my question: When installing the exhaust cam and timing chain , does the timing chain and exhaust cam rest directly on the plastic cam guide. When I installed mine i had to put the black plastic cam guide under tension to get the exhaust cam in place. I didn't remember it being tight when I took it apart. I checked the manual and it looks correct but I wanted to get some input before I kicked it over.