It's normal. I've never seen a used diesel filter that wasn't black. The fuel in the bowl would look black if it had oil or contaminants in it.
Black fuel filter(pics included)
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by nikmirbre, Aug 9, 2021.
Page 6 of 6
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
That’s a good point. I had a canister type fuel/water separator with the plastic bowl on bottom. That thing got nasty, sometimes like black mud. Drain was useless, as it would get plugged.
nikmirbre Thanks this. -
Rideandrepair Thanks this.
-
Ah. Well then there is an issue. Check out this video.
Rideandrepair Thanks this. -
Yeah mine is not that black at all...... And from what I can see my fuel tanks aren't black either..... I just dropped truck off at mechanics. Of course ill update when I know something.
Rideandrepair and Ross_Tech Thank this. -
Running fuel tanks low in hot weather can cause this, hot return fuel strips the interior of aeroquip style lines and ends up in the tank
nikmirbre, Ross_Tech and Rideandrepair Thank this. -
Well I picked my truck up Tuesday. I went ahead and had all the injectors changed and changed all of the fuel lines. I changed the fuel filter yesterday after driving about 1100 miles since Wednesday. Fuel was looking good. It wasn't very black to begin with but, it was a lot clearer. I drained the fuel enough to wipe the old blackness from the sides of the bowl.
When I drained the bowl the initial fuel that came out wasn't dark at all. I didn't bother having him test the injectors because I wanted them to replace them as a precaution anyways. Ill change the fuel filter at the end of the week and update.Ross_Tech Thanks this. -
Drained a bit of fuel today and its looking all good so far!!!!! Since Saturday ive driven about 700 miles. Normally it'd be a little dark by now, but nothing to report but good news!
F1EXPRESS, loudtom, Rideandrepair and 1 other person Thank this.
Page 6 of 6