i see a lot of people using ball valves right next to there header lines.do people do this to help the flow in the headers.in other words to put just enough water in the pipes to keep them cool.my problem is when my t-valve opens to let water in it seams to put a small amount off condensation on my oil filler cap.it makes me a little nervous and wondering is there any thing i can do.i have from my pump a gate valve to a tee.those go to the front of the motor,from there it goes out of the top of the motor to the tee valve on one side and exits out with a gate valve towards the back of the boat.the cam im running an engle cam with a 248,258 at 50thds.it does have a little bit of over lap i just need to get it right this spring.some one please help.pics would be great.