Ford Powerstroke Diesel Forum banner
coolant filters
1-1 of 1 Results
  1. Engine 911
    I got a Sinister bypass coolant filter about a month ago in my 2006 F-250 6.0 and now I am getting a hissing noise from the back of the engine, right where the outflow for the bypass is spliced back in. There have been no leaks and I even have a new filter on there - and still the noise...
1-1 of 1 Results