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  1. #1

    Default 07 mercruiser 8.1 496 Seawater pump question

    Im having some issues with my motor going into guardian mode. Had a scan done and it related to exhaust manafolds getting to warm. Alarm goes off and goes into guardian mode at about 172 degrees engine temp. Anyway was recommended to change the impeller housing at the same time as the impeller.
    I have the pump housing off already. If I change the housing is there a special puller to remove the pulley? Do I really need to change the housing? 130 total hours on motor. Im thinking just change the impeller and try it to see if it solves the issue, if not I'll have till spring to get that $400 housing. Anyway looking to get that pully off. Any suggestions? closed cooling system. Already changed the t stat to no avail
    Last edited by NH TOONER; 09-25-2017 at 10:23 PM.

  2. #2
    Join Date
    Jun 2006
    Location
    Spotswood, NJ, USA
    Posts
    3,861

    Default Re: 07 mercruiser 8.1 496 Seawater pump question

    the GM power steering puller/installer

  3. #3

    Default Re: 07 mercruiser 8.1 496 Seawater pump question

    Quote Originally Posted by Bt Doctur View Post
    the GM power steering puller/installer
    Thank You
    so what are your thoughts on changing the housing at the same time? Seems like dealers tell you to change the housing without even inspecting it.

  4. #4
    Join Date
    Dec 2006
    Location
    Chaumont Bay, N.y., USA
    Posts
    5,218

    Default Re: 07 mercruiser 8.1 496 Seawater pump question

    Ayuh,.... I'd inspect it 1st,... The inner surfaces must be completely defect free to work properly,....

    Any scrapes, gouges, ANY defects what so ever,..... Replace it,....
    Any Grease is Better,... Than No grease at All....

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