heater core replacement
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New User
Joined: Nov 2009
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From: SE WV
heater core replacement
I have an 02 250. This weekend the heater core went bad (anti-freeze all over the windshield and coming out of the vents). I still had some heat, for a while. I loosened the cap on the resevoir to see if that would help cut down on the pressure shooting AF all over the windshield. It was really hot inside the cab for a while. I stopped and shut the engine off for about 20 min and when I started it up again, just cold air blowing. I tightened the cap back up, but it was still cold. Did I air lock it somehow? I'm changing the heater core now, but didn't know if something else is wrong too. Sorry for such a long post.
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Joined: Jan 2009
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From: Glen Rose,Texas
Not that this pertains to your troubles but it might be a good time to change the t-stat and ELC coolant if it has been in there a long time.Start off with a new one.
Last edited by riverrat41; Jan 20, 2010 at 07:44 AM. Reason: adding
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From: SE WV
I might end up using them. I didn't realize that it would be so hard to find new ones that fit. The new core pipes are .007" bigger than the old ones.
It's a tight space under the cowl, I wasn't sure I would be able to get the clamps tightened up. I've never had to do much with this truck, so this is new to me.
It's a tight space under the cowl, I wasn't sure I would be able to get the clamps tightened up. I've never had to do much with this truck, so this is new to me.
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Postmaster
Joined: Jan 2009
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From: Glen Rose,Texas
Stay after it,you are doing fine.You will be plenty proud when you done,then your next mod or repair starts.....
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Joined: Nov 2009
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From: SE WV
Hopefully the next one will be a mod and not a repair. What are the Cold A/c and true cool mods? (the ones in your signature).
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Joined: Nov 2007
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From: Payson, AZ
Cold A/C refers to a mod to recirculate the coolant back to the block before it reaches the heater core when using the A/C, that is if your truck doesn't already have a vacuum actuated recirculation valve.
Here's is my version of the Colder A/C Mod. Photobucket Link.
Here is something that I didn't address in my Photobucket write-up: If you only want the valve to operate in "MAX AC" setting just tee into the white HVAC vacuum line instead of the red one. In the winter I pull the vac line at the valve and plug it and the valve and the system reverts to normal.
