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Thread: Water in fuel sensor & fuel heater in the fuel filter housing ?

  1. #1
    Diesel Enthusiast
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    Question Water in fuel sensor & fuel heater in the fuel filter housing ?

    Questions about the filter manager on my 95...?

    Is the fuel heater in the filter manager the same element as the water in fuel sensor…are they one in the same?

    I so far have unplugged the 2 wire connector directly located behind the fuel manager that appears to have 2 wires running to the bottom section of the filter housing, best I can see anyways without removing the filter housing.

    Is there another plug for the fuel heater or does this 2 wire plug supply power to both the water in fuel sensor & the fuel heater in the fuel manager or like I asked above does the one element do both?


    TIA

  2. #2
    Just Another Diesel Guy Turbine Doc's Avatar
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    no, they are 2 different elements, & 2 different connectors
    Tim (A-ACLU #29)
    98 (S)K1500,3.73 gear,4L80,Heath 4"exh,Amsoil air & bypass oil flts,Heath fan clutch,Stans Xover,pilar mtd BST/EGT/TRN,remote 12v fan tran cool,PML trans pan, PML diff cover, Hi pops, Heath PCM,Heath remote FSD, HDP Balance Flow, Heath lift pump, SSBC front calipers, EGR rear disc conversion, Goodrich brake lines, No-Slip locker, Roadmaster suspension, Lube specialist oil lines, Putnam lock & load hitch, A-team turbo.

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    Registered User vail426's Avatar
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    On the side of the housing near the bottom is the water in fuel sensor. It is held there by 2 screws and has 3 wires to it. The heater as you know is at the bottom with 2 wires.
    1995 Silverado K2500 / 174k miles / stock / vin F / ext cab / long bed / boost gauge /60G glow plug override mod / Gray Stanadyne PMD on sink in bumper nostril / lift pump relay mod / stainless steel crossover / fuel pressure gauge / early model lift pump / Kennedy 20" fan / Hayden 2839 fan clutch / Opti-Lube XPD at every fill up

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    Excellent thanks so right now I have the 2 wire connector unplugged, that must be for the heater, correct?

    Looked online at rockauto, no replacement heater element to be found...maybe I am not looking in the correct section?

  5. #5
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    Probably have to go to stanadyne dealer to get one as that is who makes the filter mgr, or possibly a dealer for the p/n
    Tim (A-ACLU #29)
    98 (S)K1500,3.73 gear,4L80,Heath 4"exh,Amsoil air & bypass oil flts,Heath fan clutch,Stans Xover,pilar mtd BST/EGT/TRN,remote 12v fan tran cool,PML trans pan, PML diff cover, Hi pops, Heath PCM,Heath remote FSD, HDP Balance Flow, Heath lift pump, SSBC front calipers, EGR rear disc conversion, Goodrich brake lines, No-Slip locker, Roadmaster suspension, Lube specialist oil lines, Putnam lock & load hitch, A-team turbo.

    98 C1500 Burb Heath reflash,exhaust,ATT, Heath cooling system, Heath FSD

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    I found the part # in the sticky section THX!

  7. #7
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    The GM part number listed here does not come up with anything?

    The GM part number the dealer supplied me with for the fuel heater is 12511964, GM dealer part retail $199.44.

    Stanadyn has no cross reference for the part number, the gent I talked with at the local dealer is sending stanadyn an email & will call me back.

    This may very well end up coming from the junkyard if i can not find one used from a member...?

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    ssdieselsupply (TD Edit, direct hotlink to non site vendor edited out we don't provide free adverts to non site sponsors that compete with existing sponsors with hot links to their site, not a big issue this note just as an FYI to all)

    Not much better at 189.99.

    Sounds like you're not even gonna get kissed.....
    Last edited by Turbine Doc; 08-23-2010 at 02:25 PM. Reason: removed direct hot link

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    Yea I'm going to pull the manager off this weekend see if there is any bare wires before I shell out that kind of dough.

    gmpartsgiant dot com GM Part 12511964

    Genuine GM HEATER,FU

    Retail Price: $199.44 Your Price: $139.26

  10. #10
    Just Another Diesel Guy Turbine Doc's Avatar
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    If wires are intact, I've used red RTV to re-insulate/isolate in the past, as a FYI you'll want a new o-ring for that as well that is a dealer procurable part, or IIRC Walking J may have some.
    Tim (A-ACLU #29)
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    Thanks Tim!

    Just got the call back from my local dealer stanadyn part # 31341 100 watt heater $62.00

    Still gonna check it out this weekend before I jump into anything, THX all!

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    I thought the OEM FFM was a Racor unit? that may explain why stanadyne wasnt much help. I misunderstand stuff frequently, so please ignore this statement if I am wrong.
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    Registered User buddy's Avatar
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    Nice, Stanadyne is less than half the price as online GM parts.

    while youre in that FFM, see if there is a corkscrew piece inside the central fuel input shaft. The heater slides up into this shaft into the corkscrew thing. If the screw thing is there just push/pull it out as its a restriction for fuel pressure.
    94 6.5TD C1500 ECLB w/ 50 gallon aux tank/box; 235/75R17 tires on Alloy wheels; 3.42 gears; A-Team Turbo; 4" Aero Turbine 4040 muffler to 5" Aero Turbine 5050XL muffler to 6" tip before rear axle; FSD heatsink, marine injectors; "F" intake; SynBlend 10W-30 oil; Walbro FRB-5 w/ 12 micron prefilter; Feed The Beast; WMI and Propane fumigation; OPS extension & relay; 110K original miles; Engh GMTDScanTech
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    Just Another Diesel Guy Turbine Doc's Avatar
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    Quote Originally Posted by GM Guy View Post
    I thought the OEM FFM was a Racor unit? that may explain why stanadyne wasnt much help. I misunderstand stuff frequently, so please ignore this statement if I am wrong.
    http://www.stanadyne.com/view.php?id=26 top right corner picture, our FFM is a Stanadyne item
    Tim (A-ACLU #29)
    98 (S)K1500,3.73 gear,4L80,Heath 4"exh,Amsoil air & bypass oil flts,Heath fan clutch,Stans Xover,pilar mtd BST/EGT/TRN,remote 12v fan tran cool,PML trans pan, PML diff cover, Hi pops, Heath PCM,Heath remote FSD, HDP Balance Flow, Heath lift pump, SSBC front calipers, EGR rear disc conversion, Goodrich brake lines, No-Slip locker, Roadmaster suspension, Lube specialist oil lines, Putnam lock & load hitch, A-team turbo.

    98 C1500 Burb Heath reflash,exhaust,ATT, Heath cooling system, Heath FSD

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    Ok so how much risk or potential danger am I taking by operating this with the fuel heater unplugged?

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