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#1
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Dirty Secondary Fuel Filter Photos
So, had noticed performance dropping off - not so much top end, but accelerating. RPM max flat road was decreasing - got to where it would not even run up past 4000 RPM - starting considering usual suspects, including ALDA, turbocharger, etc.
0-60 time was, I swear, over 20 seconds .... maybe closer to 30! gsxr and I discussed a few emails worth - I interconnected the two pressure lines going to the switchover valve - I got surging which surprise gsxr - I didn't know what to expect. So, started thinking about it and thought would replace the fuel filter. After changing filter (had previously changed the inline filter), my rough watch timing says more like about 12-13 seconds or so - a clearly noticeable increase, plus the RPM would roll right through 4000 to nearly 4400 and then shift quickly and firmly - I could get it to shift a bit earlier (603.970 doesn't have much power way up) ... I drained the old filter - it was very nearly black ... could see particles in solution - see container in background of photoe. I then chiseled open the filter to examine the paper element - it too was black (see second photo) - like you had poured old diesel crankcase oil on it ... grainy feeling, too. I have never pulled the fuel straiiner in the tank - I got an oring from Phil so will probably do that sometime when I get down to fumes in the tank ... With gsxr's email guidance am gonna hook up a Mityvac gauge and see what boost pressure am getting ... Thanks, gsxr and all the other great knowledgeable folks on this site - dear god, I love getting oily and greasy!
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George Stephenson 1991 350 SDL (200K and she ain't bent, yet) former 2002 E320 4Matic Wagon - good car former 1985 300 CD - great car former 1981 300 TD - good car former 1972 280 SEL - not so good car a couple of those diesel Rabbits ...40-45 mpg |
#2
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Here's mine after about 20k....it was filthy as well, I noticed a slight power increase with the new one in....and I think it may be time to change it again....
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) Last edited by whunter; 10-22-2010 at 11:48 AM. |
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pawoSD - your's looks almost new!
You can see through the fuel, even ... Hmmm - maybe I haven't changed the filter ... er, ever ... I swear, I thought I did!
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George Stephenson 1991 350 SDL (200K and she ain't bent, yet) former 2002 E320 4Matic Wagon - good car former 1985 300 CD - great car former 1981 300 TD - good car former 1972 280 SEL - not so good car a couple of those diesel Rabbits ...40-45 mpg |
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Nice dremmel tool there. You do know that you can buy an oil-filter opener, right? They're cheap, would work on the fuel filter, and wouldn't leave any extra metal inside.
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#5
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Actually that dremel is now deceased ....but now I have a new variable speed one!
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
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Dremel's aren't too bad, but after using an air-powered die grinder, I'm not looking back. They don't heat up.
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#7
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No supportive comments regarding my elegant chisel approach?
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George Stephenson 1991 350 SDL (200K and she ain't bent, yet) former 2002 E320 4Matic Wagon - good car former 1985 300 CD - great car former 1981 300 TD - good car former 1972 280 SEL - not so good car a couple of those diesel Rabbits ...40-45 mpg |
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Well, there would be fewer fragments inside the filter than you'd get with a dremel.
If you're opening oil filters, it's not a good thing to be adding metal. The chance of finding fragments in the fuel filter would seem to be a lot lower, but still, you might want to know if they were deposited there by something. |
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the amount of dirt in those filters is impressive.. and not in a good way although i doubt mine would look much different
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#10
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Quote:
I see some of the diesel fuel station pumps with their own spin on fuel filters and from my understanding they all have them externally or inside the pump housing....the fuel is filtered when its dispensed...so where does the contamination come from? Is it organic/bacteria/fungus growth in your tank? I had a gas tank rust from the inside out once.. so could it be iron oxide/rust contamination?
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FRED Daily Driver: 98 E300TD 199K Hobby Car: 69 Austin Mini Past Diesels: 84 300SD, 312K 87 300SDL, 251K 94 Chev. K-1500 6.5Ltr.TD, 373K Last edited by F18; 09-14-2006 at 04:49 PM. |
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Good question particularly when the smaller filter looks clean.
Sixto 93 300SD |
#12
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Quote:
My take is that it must be gunk in our tanks from years of use. Whenever I've gotten fuel and put it into a container it always looks clear with no junk floating around. Yes, the pumps do have filters on them. Ever notice how some pumps are slow? Thats the pump filter clogging up. To me that means the pump filter is doing its job. A car that sits for extended periods will get gunk buildup in the tank/fuel system. Anyone know is this from the fuel evaproating or what? Could be fungus growing too I guess. Cheers, Bill |
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Here is a thought.....look at thoughs pictures that George and PawoSD posted again. The filters look like they are contaminated with particulate soot!
Is it possible that the soot is somehow picked up by the return fuel lines/jumpers from the injectors and soot contaminated fuel sent back to the tank?
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FRED Daily Driver: 98 E300TD 199K Hobby Car: 69 Austin Mini Past Diesels: 84 300SD, 312K 87 300SDL, 251K 94 Chev. K-1500 6.5Ltr.TD, 373K Last edited by F18; 09-14-2006 at 08:45 PM. |
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Quote:
Sounds like we should just go change them annually?
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raMBow 1999 E300DT Obsydian Black Metallic, Heated Full Leather Parchment options, E2, K2, 136,000+, best 36.5 mpg - GP's 12-04 & 11-12 Zero Stuck 2010 Honda Odyssey - The BrideMobile - best 26.5 (2) 2005 Honday Accord- (1 -Corporate 1 - Personal) - 110,000 4-cyl 30mpg 2000 VW Golf GLS TDI, Upsolute Chip (sold to Brother, now 300+k on it) 48.5 mpg like clock work 1987 Honda CRX HF - Sold 87,000 always over 50 mpg Max 67 mpg |
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Quote:
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E55, 300E, 65 Hipo Mustang, 66 Shelby GT-350, 69 Mach I, 66 Fairlane GT Conv., etc |
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