Fuel Filter

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Jul 20, 2006 | 06:25 AM

jetdoc

Thread Starter

Cargo Master

Joined: Jan 2005

Posts: 2,902

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From: Pasadena, Maryland

Fuel Filter

I changed my fuel filter yesterday and it was black as coal. After doing a search, I found that is pretty normal after about 15000 miles. However I remember reading that if your injector o rings were bad that would also turn the fuel filter element black. So my question is, at what interval should I change my filter to find out if those o rings need replaced? (Just turned 286000)Thanks in advance

Duncan

Jul 20, 2006 | 04:48 PM

7.3powerstroke

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Joined: Dec 2004

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I dont know about the injectors but I change my fuel filter every 15k and it has never been black. Its always been a greenish, the same cooler as the fuel. Good luck.

Jul 20, 2006 | 05:35 PM

Markadeck

Gone, but not forgotten

Joined: Oct 2005

Posts: 5,026

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From: Charlotte-Fairbanks-Bflo

Quote:

Originally Posted by 7.3powerstroke

I dont know about the injectors but I change my fuel filter every 15k and it has never been black. Its always been a greenish, the same cooler as the fuel. Good luck.

Me too, but mine is the other Christmas color usually. This is the first I have ever heard of black. You putting your used crankcase oil in the fuel tank by any chance?

Jul 20, 2006 | 06:39 PM

blown99

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Don't be to concerned with the element being black. The purpose of the filter is to filter out dirt, debris, etc. so it will get dirty or black. I don't think I have ever changed one that wasn't black. You should question the injector o-rings if your oil level in the oil pan is dropping. We normally change them every 10K, or twice a year. The service manual states that you can go 15K between intervals.

Jul 20, 2006 | 08:06 PM

jetdoc

Thread Starter

Cargo Master

Joined: Jan 2005

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From: Pasadena, Maryland

Thanks for the replies...I guess I'll just change the filter more often, they are cheap enough at FleetFilter. I'll try and find the thread about injector o rings and black fuel filter though.

Duncan

Jul 20, 2006 | 08:59 PM

powerstrokin007

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From: Elmendorf AFB, Anchorage

Never had black, always crap brown looking.

Jul 20, 2006 | 10:06 PM

RubberDuck

Logistics Pro

Joined: Jul 2001

Posts: 4,137

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From: Marble Falls, Texas

I just discovered something in my fuel filter, and tjbeggs totally hooked me up. My fuel filter was black and looked to be greasy. Literally greasy. I posted in the OBS forum and tj told me it was algae. Apparently that is common. I was never aware of it. I'm currently treating it with Power Service Slime X part #9225. But I too thought injector O rings. But he said if it's greasy it's algae. Who knew? Anyway hopefully you just have algae and not bad o rings. Good luck. Theres a whole thread in the OBS forum under Black Fuel Filter. Later.