I am still in the process of putting my engine back together after having the injection pump and injectors rebuilt. After installing the manifold and exhaust riser, a couple more questions come to mind:
1. I know I have drained and refilled the coolant a number of times. And yet I am never sure of the correct procedure for doing this. I know IF fill the system from the recovery tank in the starboard sail locker. And yet, I have to burp or purge air from the manifold tank down on the engine at some point in the process. Can anyone walk me through the process they use in fill the freshwater side of the cooling system?
2. What do you all recommend as an insulating wrap for the dry section of the exhaust pipe?
Burp! I don't have an answer for you but I'm interested in this too.
I bought my 365 (with a Westerbeke 40) that had been on the hard. Launched with antifreeze level full at the cap of the remote fill in the starboard locker. Motored home. Next day, the antifreeze was down by almost a gallon.
I feared the heat exchanger or the head gasket was bad even though it ran fine. But after refilling, the level hasn't gone down since.
Maybe it just needed burping, poor baby.
There's a second radiator cap on top of the exhaust manifold - I would think you could burp there?
BTW, it holds a lot of antifreeze. I'm in the process of replacing the heat exchanger and oil cooler and drained 2 1/2 gallons of antifreeze out. Had to drink a few extra bottles of water yesterday to have containers for the last 1/2 gallon!
Look for an obstruction in the line between the expansion tank and the engine. I had the same issue and the connecting line was plugged at the expansion tank. Also, the radiator caps have different pressure relief ratings, I do not remember what they were and I no longer have the W40 in my boat.