Hi All,
I have a question concerning the placement of my anti siphon valve for the
raw water injection hose that goes into my
exhaust on my
Volvo Penta 2003
diesel. My
motor is
raw water cooled and only has 200 hours on it. It was built in 1984 but the
boat was just commisioned this August. There was no anti siphon valve on the
boat so I bought a Vetus anti siphon valve. On this
motor there is a copper tube that goes from the rear of the
head into the side of the
exhaust elbow. I made an assumption that this is the
water injection site into the exhaust so I cut this tube in half and then installed the anti siphon valve. I was able to postion the valve so it is approximately 2 feet above the waterline. I have noticed that when the boat sits for a few days and the motor is started a huge column of
water comes out my exhaust . It shoots out maybe 10- 15 feet behind the boat. I am concerned that if the boat sits idle long enough the water will eventually fill my
muffler and then enter the motor. In order to see how much water was coming from my
engine I disconnected the exhaust hose from the inlet side of the
muffler and let it drip into a 4 quart size pan ( My wife loves it when I use her kitchen pans for
engine work!
). Anyway I got at least 4 pans full of water so 4 gallons or so in a couple of days and it still seemed like it was dripping. I checked the siphon valve and it is working fine. I checked to see if raw water was somehow coming into the motor through my water strainer but it was fine. Is the anti siphon valve placed in the wrong spot? Could all this water be just the block draining? I am not sure how this could be the case since the inection point is at the top of the engine but who knows? I forgot to mention that my boat is a sailboat. Any ideas would be greatly appreciated.
Kevin