Stupid oil filter question I know, but.....

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Ozdriver, Dec 16, 2015.

  1. Ozdriver

    Ozdriver Heavy Load Member

    Oct 16, 2015
    With the CAT IR 0716 oil filters, and most other oil filters, the info says tighten to hand tight, then use filter wrench to go the next marked spot on the filter, in other words go from 3-4 or 1-2 and so on. To me that doesn't seem tight enough, and I probably go overboard tightening the filters which make them hard to come off.
    Anyone go strictly by the recommendations without problems? I actually heard of a filter unscrewing on the road and dumping the oil.

    Edit : Just found out I've been misinterpreting the little illustration on the filters for the last 20 years thanks to @swaan. Doh! But I've always done the filters up my way, so no loose filters.
    Last edited: Dec 16, 2015
    Cottonmouth85 Thanks this.
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  3. Cottonmouth85

    Cottonmouth85 Bad Influence

    May 3, 2012
    Floresville, Tx
    I'm on the same line of thinking as you. I'd rather put some muscle into it when I have to take it off than have it leak or fall off.
    Diesel Dave, Ozdriver and mountaingote Thank this.
  4. swaan

    swaan Road Train Member

    Jul 12, 2009
    BC canada
    I've always oiled the Oring on new filter and installed as tight as I can get it by hand.
    I only use a filter wrench to remove the filter.
    Cottonmouth85 and Ozdriver Thank this.
  5. GrapeApe

    GrapeApe Road Train Member

    Jan 7, 2013
    Most smaller filters, if you follow the instructions, is about an additional 3/4 turn after hand tight. That's pretty tight as far as filters go. I've always spun them on snug, then an additional 3/4 turn. Which is about as tight as I can get them by hand, but I usually use a filter wrench (I've slipped and banged my knuckles too many times). The big Cat oil filters call for 1 turn, so that's what I do on those.

    I've never had one come loose (knock on wood). I have had some that someone put on so tight that the wrench crushed the filter getting it off.
    truckon, Cottonmouth85 and Ozdriver Thank this.
  6. Cat sdp

    Cat sdp . .

    Apr 8, 2012
    Orion's Belt
    You'd think the mighty cat would have a torque spec for them....
    Cottonmouth85 and Ozdriver Thank this.
  7. AModelCat

    AModelCat Road Train Member

    Jul 7, 2015
    Generally I go 3/4-1 turn past the point the gasket touches the filter head. I usually use a strap wrench because I can't grip the filter tight enough with oily gloves or hands. As long as you keep the wrench at the top of the filter and don't go full stupid on it, it shouldn't crush. Worked with a young lady who refused to use a wrench to tighten the filters and every one of hers would loosen off and leak within 2-3 days.
    Ozdriver Thanks this.
  8. Scuba Steve

    Scuba Steve Light Load Member

    Jun 21, 2009
    Chicago IL
    I oil the new gasket on the filter and put it on as tight as I can get it by hand, knock on wood but never had a problem when doing it like that. I only use a filter wrench when I remove the oil filter.
    Ozdriver Thanks this.
  9. Duckman1005

    Duckman1005 Bobtail Member

    Nov 18, 2015
    Hand tight and 3/4 of a turn and forget about it.
    Ozdriver Thanks this.
  10. Ozdriver

    Ozdriver Heavy Load Member

    Oct 16, 2015
    Well, they do, sort of. Hand tight then turn to one of the numbers on the filter. Kind of like the torque-turn method of tightening main bearing caps....sort of
    Cat sdp Thanks this.
  11. Ozdriver

    Ozdriver Heavy Load Member

    Oct 16, 2015
    If you go by CAT's recommendations of hand tight then tighten to the next number printed on the filter, then that's not even 1/4 turn and that doesn't seem enough

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