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Thread: 1996 6.5 Diesel Fuel Filter 101

  1. #1
    Join Date
    Mar 2002
    Location
    Lecanto, FL
    Posts
    368

    Default 1996 6.5 Diesel Fuel Filter 101

    My 96 2wd 6.5 Silverado has just been purring along until the other day. It sits more than it is driven

    On a less than 10 mile trip to the office it cut off 2 times and hick upped one time all at low speed to idle.

    Always started right back up.

    After a few hours on the return drive I made one stop and pretty much kept her idled up and she seemed fine all the way home.

    She has a new pump and a bumper mounted PMD.

    In going through the records I see the fuel filter hasn't been changed in the year since I've owned it or in the past.

    So I'm ready to drop in a new filter.

    What I have observed is when I open the bleeder valve on top of the filter when running, nothing comes out the bleed hole until you open it all the way and then leaks out but still not out of the hole.

    Checking the fuel pressure at idle its right at 3.1. Wth the motor off & the key on the pressure is more like 7 +.

    The lift pump does not appear to be the original and no additional filters have been installed.

    My course of action would be to get a new filter & check screen and retest.

    Question: Should I consider upgrading the filter setup at this time or keep the OEM setup and ad a pre filter once I solve the problem?

    Thanks as always
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  2. #2
    Join Date
    Mar 2000
    Location
    Brighton, CO, USA
    Posts
    441

    Default

    Re the filter bleeder, that's pretty typical from what I've experienced. I think it's intended to bleed air rather than flow a precise stream of fuel. I've always used to water drain T valve near the oil filler to measure fuel pressure.
    2006 Chevy K2500 LLY Duramax/Allison Crew Cab!
    1996 Chevy C2500 6.5 auto Ext. Cab LB

  3. #3
    Join Date
    Apr 2001
    Location
    Newberg Oregon
    Posts
    11,493

    Default

    Check the fuel flow at the front of the engine using the water drain valve.

    Pull the hose up from below and stick it in a can.

    With the engine running ...open the valve and fuel should flow freely.....engine should not stop or do anything odd.

    I replaced my factory filter with a Racor stand alone unit.

    you need a filter that can pass at least 20 GPH

    The fuel is constantly recirculating back to the tank to keep the IP cool....

    Having a filter with a manual fuel priming pump is a sweet deal.....especially if you run the system out......

    During filter change....simply replace the filter, remove the supply line to the IP and then use the plunger pump to refill the filter until fuel comes out the supply line at the IP

    Get a filter with a water separator bowl.

    I used the RACOR 230 R2

    2 micron filter with primer pump, water bowl and drain.
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2007 Chevy Avalanche
    THIS IS BOW TIE COUNTRY

  4. #4
    Join Date
    Mar 2002
    Location
    Lecanto, FL
    Posts
    368

    Default

    Thanks Robyn and Joe,

    Any sources on the Raycor?

    I'm on the fence as she may not be a keeper as I should have got a 4wd. (But of course a guy need both)

    I did this swap on the 84 6.2 Motor Home a number of years ago and it went pretty seem-less.

    Low ~
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

  5. #5
    Join Date
    Mar 2002
    Location
    Lecanto, FL
    Posts
    368

    Default

    Dang Screen wasn't in the filter. I slapped it back together. & parked where I could do some more testing and DX & thrash on it.

    I would rather put the money in a filter setup ect.

    filter.jpg
    96 1500 6.5 Silverado

    81 Malibu ~ 75 Vega Wagon

    Lecanto, Florida

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