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kjames90755 wrote:Phred42044 wrote:
2000 HR Endeavor DP 46000 miles.
Cat 300 HP w/ Allison 6 Speed Tranny.
Problem: Driving along and engine was losing power. Would idle and sometimes get up to full power but would ultimately "chug chug" down the road. Finally made it to a rest stop and got some family to come help me. Chugged it to the nearest diesel mechanic who immediately diagnosed the problem as a fuel separator (filter?). Changed separator and the thing ran like a champ. The mechanic said it is good practice to change the fuel separator once a year under normal driving conditions as diesel fuel is mighty nasty stuff. He also mentioned that when taking off the old filter there was visible trash in and around the filter. I got off luck with a $20 filter and $75 in labor.
The fuel separator is actually a filter to separate water from the diesel oil fuel...when they get full, the water has to be released, and the filter changed--most engines mfrs. recommend doing this whenever you have an oil change at a minimum, whether it needs it or not--you don't want water in a diesel engine...
You would think the people who change your oil would automatically change the fuel separator. I am glad I read this post. Thanks for the tip. Dave P.
