How to Troubleshoot Coolant Mixing with Oil in an 8V92 Detroit Diesel Engine?

It sounds like you're dealing with a frustrating situation with your 8V92 Detroit Diesel marine engine. From what you've described, the issue likely stems from a worn-out head gasket. When the head gasket fails, coolant can leak into the oil system, which is exactly what you're experiencing. This can lead to severe engine damage if not addressed promptly. While it might be tempting to avoid pulling the heads for inspection, I strongly recommend replacing the head gaskets. If you don't, the coolant will continue to mix with the oil, which can cause significant stress on the engine and hinder its performance. It's also important to consider that both head gaskets should be replaced to prevent further issues. Regarding the heads, it's advisable to have them machined. While some mechanics might be able to sand them down adequately, using a machine shop ensures that the heads are perfectly flat and reduces the risk of the problem recurring. It might take a bit longer, but it’s worth it for peace of mind. If you're concerned about sourcing parts or finding a good mechanic in Panama, I can share a couple of contacts who specialize in marine engine repairs and speak English. They should be able to help you get back on track. Just remember, addressing this issue sooner rather than later will save you from more extensive repairs down the line.