Q & A — June 2003
By Capt. Ken Kreisler
| Turbocharger maintenance, a cool-running diesel, and more.
new boat has a single turbocharged diesel. Can you give me a primer on
how it works and the maintenance involved? C.R., via e-mail
The area between the hot and cold sides contains bearings, on which runs the shaft that connects the compressor and exhaust turbines. As the shaft can spin at speeds in excess of 100,000 rpm and temperatures here can top 800°F, right oil flow is critical for both cooling and lubrication. Use the proper oil--CC- or CD-rated--and change it and all filters at or before the recommended interval. Periodically inspect the area between the two chambers for signs of leakage. If the seals here fail, so will the bearing and, ultimately, the turbocharger. Occasionally visually inspect both turbines for signs of damage or excessive deposits. The hot-side turbine will normally be coated with black soot. Finally, let your engine cool down for two to three minutes at idle before shutting it down.
This article originally appeared in the May 2003 issue of Power & Motoryacht magazine.