Ultra Low Sulfur Diesel
We just had a problem with our 2001 Cummins 350 engine with only 65,000 miles. The seals on the injector fuel pump had to be replaced. We were told it was the result of using Ultra Low Sulfur fuel a...
Forum Discussion
hipower wrote:
As a general point of conversaion it seems that frequenty the lift/transfer pump failures in the 2002/2003 time frame get blamed on seal/gasket material being somewhat less than accomodating of ULSD fuel. I can't say with 100% certainty that this is true, but my 2003 Dutch Star pump failed about a year ago and the shop said they see this happening and the newer pumps have a different seal/gasket material and seem to be lasting better.
As usual opinions will vary.
Yes this is true. The nitrile rubber (Buna N) seals/o-rings were not as compatable with ULSD as the compound currently being used. Also throw into the equation the age of the seals failing. I have not seen any issue with ULSD and seals on new components but that could also be the less age on the components.
Mike.
