heater hose I.D

[1990LTD]

I'm in the process of waking the LTD out of hibernation and it has a coolant leak or two (in the only parts of the cooling system I haven't replaced yet, of course)


It's dribbling out of the plastic piece that joins the two pieces of heater hose running along the passenger side valve cover. I don't know if it's a restrictor valve or what but it's leaking and has to go.


I just plan to stick a piece of tube in there to join the pieces of heater hose back together but I don't want to have to pull the piece, take it around to find something that matches, go back and hope it fits. I want to make a piece up first and have it ready before I even remove the plastic one that's currently on and leaking.

Seems like the ends of the plastic piece are flared slightly so the hose clamps have something to grab onto. I'll have to do that as well.

[jaywish]

I am pretty sure you are looking at the heater control valve. It has vacuum and electrical connections. It controls the the floor heat position. When the heat control is in the floor position, it keeps the climate control off until the engine warms up a little so cold air does not blow into the passenger compartment. It is my favorite winter position unless I need the defog.

[1990LTD]

it's got no connections that i could see, i could be wrong. nothing is hooked up to it anyway.


i have manual heater controls btw

[jaywish]

That explains that. Or it was just bypassed and replaced early on. I can not remember the diameter for sure 5/8?

[1990LTD]

thanks. i should probably just replace the hoses anyway, they're original AFAIK. same with the core, unless the original owner had them replaced at some point.


i have a new core anyway since the inlet/outlets will probably break when i try and take the hoses off. i want to tear more of the a/c junk out if i'm going that far into the dash so i could make that a project. funny how this stuff starts with a little leak

[Lincolnmania]

5/8"