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  1. #1
    Join Date
    Aug 2016
    Location
    Lake Lanier, GA
    Posts
    5

    Default Chrysler 360 fresh water cooling question

    Anyone know the function of the small hose that goes from the water pump to the manifold return lines?
    Hopefully the photo will display.... a little challenged with uploading files.
    Thanks, Scott
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    Join Date
    Dec 2006
    Location
    Chaumont Bay, N.y., USA
    Posts
    5,145

    Default Re: Chrysler 360 fresh water cooling question

    Ayuh,.... My guess is a vent, around the t-stat for when fillin' the block, to vent the air pocket that forms,....
    Any Grease is Better,... Than No grease at All....

  3. #3
    Join Date
    Apr 2016
    Location
    barnegat NJ
    Posts
    2,707

    Default Re: Chrysler 360 fresh water cooling question

    You mean that's not the windshield washer, lol

  4. #4
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    9,092

    Default Re: Chrysler 360 fresh water cooling question

    Scott, there is a misnomer regarding the term Fresh Water Cooling.
    If your engine's cooling system incorporates a Heat Exchanger w/ ethylene glycol as the coolant, then you have a Closed Cooling System.
    If not, then you have an open system, aka a Raw Water Cooled engine.

    Post back reqarding the actual type of cooling system that your engine is equipped with.



    .
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP's

    Please... no PMs! Post your questions on the forum.

  5. #5
    Join Date
    Aug 2016
    Location
    Lake Lanier, GA
    Posts
    5

    Default Re: Chrysler 360 fresh water cooling question

    Thanks for the replies. A vent seems plausible. That could have prevented the right manifold from forming an airlock after my engine rebuild! I would prefer the peace of mind to cap off both ends. I don't think it's a marine grade windshield washer hose. Yes Rick, it's a closed cooling system.
    Last edited by Scott.C; 04-13-2017 at 05:41 PM.

  6. #6
    Join Date
    Aug 2016
    Location
    Lake Lanier, GA
    Posts
    5

    Default Re: Chrysler 360 fresh water cooling question

    Click image for larger version. 

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  7. #7

    Default Re: Chrysler 360 fresh water cooling question

    It appears that the hoses on the right manifold are reversed, should feed from the bottom up as does the left one. The "vent" tube should be replaced with better quality hose, (if winshield (sic) cant be spelled correctly how good can the hose be. should be able to take a little heat and maybe some clamps.

    A link to another string: http://www.marineengine.com/boat-forum/showthread.php?23596-Chrysler-318-Cooling-System


    http://www.coastalcafe.com/images/tr...wc_pumbing.htm




  8. #8
    Join Date
    Aug 2016
    Location
    Lake Lanier, GA
    Posts
    5

    Default Re: Chrysler 360 fresh water cooling question

    Here's a picture of the plumbing on the old engine before the rebuild. The Manifold hoses should look the same on the new motor. I have been under the weather and haven't been to the boat in a few weeks. My old engine broke a valve after three seasons and 100 hours. I only paid $2000 for it as a turn key unit. I was very tempted to purchase a new powerplant, but finances led me to do a complete rebuild instead. Hopefully it will do the job. Eight hours on it so far.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  9. #9

    Default Re: Chrysler 360 fresh water cooling question

    While you are switching the hoses on the right manifold consider getting the tee above the thermostat housing (as referenced on "chucka's photo). That would make the tee the highest point in your system and maximize the bubble sucking purpose of the vent tube.

  10. #10
    Join Date
    Aug 2016
    Location
    Lake Lanier, GA
    Posts
    5

    Default Re: Chrysler 360 fresh water cooling question

    Mcomm, Thanks for all the info. You are right about switching the hoses. Can't believe I did that! Hopefully I haven't damaged anything on the right side of engine.

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