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6.2 diesel fuel filter housing

Discussion in 'GM 6.2 Diesels' started by lotmarker, Jun 7, 2012.

  1. lotmarker

    lotmarker New Member

    Jun 7, 2012
    Hey guys. I'm attempting to replace my old leaking, air sucking fuel filter housing with an a/m fuel water separator on my 1987 6.2l diesel chevy step van. Problem is there are 3 lines going to my old housing but only 2 on the replacement. Ive figured that the 3rd one is probably the return line but how do I route it? Any help?
  2. just a number

    just a number Active Member

    May 26, 2008
    Trenton ON
    you could have one of two possible filter setup.

    the round filter mounted to the back of the intake:

    if so you've got the same setup as the 6.5's. 1st line from the tank(3/8") 2nd one goes to the IP(1/4") and the 3rd line from the bottom is the drain hose(for water) there is a valve on the end of the line.

    Square box:

    same number of lines and sizes but the drain valve is on the filter housing instead on the drain hose itself. it also has either just a nipple or a short house at the top corner to bleed the air out. it's a common area to get air in.
    Last edited: Jun 9, 2012

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