JD: Replace heater return tube

[jdeansr]

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.

[Mr. Man]

Either wait till someone parts a dead MM or use heater hose and route away from the engine.

[musclemerc]

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.

[fastblackmerc]

Replace it with either a hose or copper or stainless steel tubing.

[mm svt]

It’s not part of the engine, it’s attached to the engine.


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[musclemerc]

^^^^Please tell me how to route it away from the engine?

[Agent2006]

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/forums/showthread.php?106614-A-resurrection-2003-MM-fix!/page3