I had thought that Detroit recommended the valves be adjusted on the Series 60 after 60,000.
We're currently looking as several 1999 XLV's and 2002 to 2003 XLII's. The miles on the coaches vary from 60,000 to over 100,000 miles. None of them have ever had the valves adjusted and none of the owners were aware of any valve adjustment needed either now or in the future.
When is the proper time to adjust the valve lash?
James & Kris
Prospective Prevost Owners