I have a 1983 westerbeke 33A diesel engine, which has fresh water cooling with an expansion tank. Found the other day that the expansion tank was overfilling and spilling into the bilge. Upon investigation, and after we dumped a bunch of overflow water, we discovered that the water was actually salt water. How is this possible? I thought these were two different systems?
Make (of engine): Westerbeke
Model (of engine): 33A
See the question please. Nothing else to add.
Hi my name isXXXXX will answer you today, the salt water is mixing with the coolant because the heat exchanger has a leak in the tube bundle and needs to be replaced.The cooling system needs to be flushed out. When the engine is running the pressure is higher on the salt water side and pushes it's way in to the coolant and when the engine is off the coolant could push it's out and could empty out all the coolant.Diesel Boat Doc41092.2730470718
35 YEARS MARINE DIESEL BOAT REPAIR
You wouldn't happen to have a diagram or something that can show me what needs to be replaced?
The red spot is where the heat exchanger should be I didn't find your model if it is not like yours you can trace the hose from the sea water pump It should have at least one cover.you may want to get a mechanic to presser test the system to make sure heat exchangers are not cheap.