- Sep 30, 2008
I think the build up of calcium in the HX is more a function how many hours the engine is run between cleanings of the HX. That being said, it is always a good idea to warm up the engine before engaging the transmission. Repeatedly running a cold diesel engine can cause several problems. Acids can build up in the engine oil, and carbon can build up in the mixing elbow. It's also a good idea to run the engine at full power occasionally for a few minutes, and avoid idling the engine for long periods. End of diesel engine tutorial.Anyone know why calcium builds up in the heat exchanger at the inlet from the water pump hose? If it makes a difference, the engine is usually only run 10 minutes at a time or less; just enough to get out of the marina, sail and then started for 10 minutes or less to get back into the marina. As a result, the engine never really gets up to full temperature.