Originally Posted by delmarrey
Go here.......... Populaire scheepsmotoren, Scheepsmotorensite, Marine-engines
There is a pdf. manual but I didn't see anything on a heat exchanger with just a quick run thru, have to run. But it might be some good info to have for starters.......................................... ..............._/)
That's where it is. Well that was more helpful than I was. It's the GM-HM workshop manual, 60 MB. I really need to start saving where I got stuff from as well as saving it. It's Chapter 8. Near the beginning of the chapter are the exploded diagrams of the heat exchanger, near the end of the chapter is the "Freshwater Cooling
System Maintenance", first subsection Pressure Testing.
Originally Posted by gonesail
i'm pretty sure that if you have a leak in the heat exchanger you will then see an increase in coolant in your fresh water overflow tank.
I thought the same thing, or at least that you wouldn't see a loss of coolant. A friend with a Perkins
had a leak that he couldn't find, a mechanic
found the leak in the heat exchanger, problem solved
. My theory as to why you wouldn't see a loss of coolant was even though the freshwater side gets pressurized and would force coolant out through the leak into the saltwater side, is when the engine cooled down, it would pull saltwater into the freshwater side as the pressure decreased. Hypothesis crushed by real world example.