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Thread: JD: Replace heater return tube

  1. #1
    Join Date
    Jun 2019
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    JD: Replace heater return tube

    I have a 2003 Marauder with close to 250,000 miles. The heater return uses a carbon steel tube attached to the side of the block which is now leaking and needs replaced. Ford no longer makes this tube and the after market parts I have found on line are not even close the original part. I checked the Mustang parts with similar engines with no luck. My question is are there any replacement heater tubes available or is there a fix to replace.

  2. #2
    Join Date
    May 2009
    Location
    Moreau Island
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    Either wait till someone parts a dead MM or use heater hose and route away from the engine.

  3. #3
    Join Date
    Jul 2004
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    The Dirty South
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    Quote Originally Posted by Mr. Man View Post
    Either wait till someone parts a dead MM or use heater hose and route away from the engine.
    Away from the engine? The hose in question is part of the engine.

  4. #4
    Join Date
    Jan 2004
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    Somewhere in the N.C. Triangle
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    Replace it with either a hose or copper or stainless steel tubing.
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




  5. #5
    Join Date
    Jan 2015
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    Mishawaka, In
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    657
    It’s not part of the engine, it’s attached to the engine.


    Sent from my iPhone using Tapatalk

  6. #6
    Join Date
    Jul 2004
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    The Dirty South
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    ^^^^Please tell me how to route it away from the engine?

  7. #7
    Join Date
    Jun 2017
    Location
    Oxford, PA
    Posts
    459
    Hello

    just route a heater hose and bypass the rusty metal tube which is NLA. I used 5/8" heater hose and a 3/4 - 5/8 adapter the hose starts out 3/4" at firewall then necks down. Leave the rusty pipe in place and hack saw off what you can so you don't have to look at it.

    https://www.mercurymarauder.net/foru...-MM-fix!/page3

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