Re: What's In Your Engine Insulation Blankets? Reply #20 – December 15, 2015, 06:16:42 pm Quote from: wolfe10 – December 14, 2015, 02:16:52 pmAn extra 20 minutes of idling every day you drive is really not good for a diesel engine.It's inviting cavitation if nothing else. Quote Selected
Re: What's In Your Engine Insulation Blankets? Reply #21 – December 15, 2015, 08:30:03 pm A 600 RPM idle is not good for any diesel. Once our air is up, we take off but don't push it until the temp gauge moves up a bit. With a cold engine, the idle oil pressure will be pretty high. As the temp increases, the idle oil pressure drops. Diesels depend on good pressure to shoot oil up into the hollow piston crowns providing cooling. With a higher mileage diesel or high coolant temps, the idle oil pressure will be lower and may not provide the straight stream necessary to fill the hollow crowns.The water pump does not operate as efficiently at idle RPM so cooling a warm engine takes longer. The oil temperature takes about twice as long as the coolant to come down so just because the temp gauge is down to 180 or so, the oil will be much hotter. This is what ruins turbo chargers as the oil refines itself into coke.In the fire service, once the engine had oil pressure in less than two seconds, it was pedal to the metal. No block heater either. Once we pulled it out on the ramp or were at the scene of an emergency, we would always switch to fast idle (1000 RPM). Diesels can run forever at this RPM. The water pump is working well, the engine has good oil pressure and everything is happy. So, at the top of a grade for a photo shoot or lunch, fast idle with a switch or your foot for several minutes. No need to warm it up in the morning once you have oil and air pressure. Just don't abuse it until it's warm.Pierce Quote Selected
Topic: What's In Your Engine Insulation Blankets?