Ford F-150 - 1997-2003 :: Bypass Heater Core On The Fly
Apr 10, 2003
My commute into the office was more difficult than usual because of the fumes pouring out of the vents. I have a 1997 F-150 5.4 V8. should I remove both in and out hoses from the firewall and connect them with a plastic fitting not to risk breaking the aluminum fittings on the motor?(There is an advanced a mile away) OR is it possible for me to remove the in hose from the firewall and remove the out hose from the motor, and run the in hose directly into the motor. Are the fittings the same and can I do that with limited time and tools?
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I have a 2003 f150. I had to bypass the heater core and now my A/C isn't working. The A/C compressor don't even come ON.
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The subjects say's it all, is there a DIY for bypassing the heater core? I already search i couldn't find it...
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How to replace the heater core?
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Friend of mine has a 99 Ford F150 with the 5.4L. He thinks the heater core has gone on it as it blows a mist through the top vents when he turns the heater on. He can also smell antifreeze. Up here in Canada, its, well quite cold, nuff said about that. He has had estimates of anywhre from $800-$1000 to change it whereas the cost of the core is below $100. Is there anywhere that he can get a diagram.... of how to change it, all he knows was that he was told to remove the entire dash to gat at it.. Is that true ?
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I have a 2001 F150 with a 4.6L.. Do I need discharge the AC lines when replacing the heater core? How difficult is it to replace the heater core?
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My heater core has a leak in it, but I can not get it replaced so I want to bypass it. How do I do that? Is there a video somewhere? Or tutorial with pictures? F-150 1998 ....
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I have 1998 F-150 and the heater core was replaced 18 months ago. All was going well until about 2 weeks ago I noticed under heavy acceleration I would smell antifreeze. The smell would clear up and would not re appear for a day or so. Finally the other day when it was 8 outside I got in the truck and got about 5 miles from the house started up a hill and it was like a fog machine was mounted behind my dash the windows fogged up almost immediately so I figured great the core went bad again. Now the temperature has warmed up the last couple of days and there is nothing no fog in the cab the heater works fine just an occasional slight smell of antifreeze. Before I go through the trouble of tearing out the dash is there anything I should check I already checked the connections on the firewall and they were fine.
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I have a '03 f 150 screw 4x4 with 5.4. I had to replace the heater core in the truck and I could hear air going through before the replacement. Now I can still hear it, have tried to burp the system a few times, even jacked up drivers side front on an incline to get reservoir higher. Ended up replacing the hose with the flow restrictor and that worked or so it seemed. The noise is back and I am lost on what to do next. I tested the head gasket and that came back negative also. What to do next or possibly what the issue is?
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I have a friend that wants me to replace his heater core on his 1998 f250 with a triton 5.4. I told him I would and I've done the one in my 1995 f150 5.8. is it the same process or where to find the step by step instructions.
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My heater core must have sprung a leak this week. Not that I need heat in this weather but just the smell of it while running the A/C just stinks. I know I am going to have to replace it myself but just for S&G, what would a dealer charge to replace it?
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Have a '02 f150 and thinking the heater core slowly dieing. Have noticed for several weeks a nice line of water leaking onto the passenger side floor. Do you have to take off the entire dash to get to it? Will be doing replacement myself as the dealer or shop would probably kill me on labor.
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New, to me, 2002 F-150 that developed heater core leak. I tore down the dash and replaced the heater core and reassembled everything.
All is good except that now the air bag light on the instrument cluster stays on continuously. There is no blinking...just a solid light that stays on.
I must have missed a connection, though I'm at a loss because I thought I got everything. Is there an obvious (though not obvious to me) connector that I should be looking for?
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I cant find my original post but I am reporting back on a low heat output issue. Not the climate door. It was the heater core clogging up. Instead of replacing, this is what I did. Purchased a "drill pump" and some clear hose and some CLR. Cut both the heater hoses,taking consideration of where best to install "T" connectors.
While hoses disconnected,filled heater core with CLR(as much as I could get in it). Hooked clear hose,drill pump configuration,on to the heater hoses. Ran drill pump in both directions for several minutes and stopping and letting it sit for a few minutes.
About 1 hour all together. Pieces of debris came out of the heater core and I could see it through the clear hose. Flushed the heater core out. Installed "T" connectors and it is heating very well now.
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We got our first taste of fall weather in Houston this weekend, and with it I've discovered a new problem with my truck. After the engine was up to temp, I noticed that the heater would blow cold air any time I sat at idle. If you rev up the rpm's to 1500-2000, you can feel the air start to get warm again. I'm guessing this means my heater core needs to be backflushed.
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2002 F150 5.4... I thought that I saw on here before a link that explained how to replace the heater core without removing the entire dash console. Looking for a link for this or get some good directions on how to replace the heater core?
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Plastic coupling between core and hose, is there a specialty to needed to remove from heater core?
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replaced heater core because when pulling a trailer it would admit steam out the defrost vents and the smell of antifreeze, what it could be?
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I bought truck with marksman remote starter and it worked great. until... I lost the truck keys. ford dealership reprogrammed key code and cut new keys.
Truck now thinks that it is being stolen every time i try to use remote start. nothing major, theft light on dashboard idiot-light hud flashes.
The question: How the heck to i bypass the anti-theft module? I know that there is equipment out there to do it?
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I just finished the replacement of my injector cups and I replaced every hose on that engine and when i replaced the heater hoses I believe I hooked them up right but just want to make sure. Is there an IN and and OUT on the heater core or does it not matter???? Im only asking simply because my legs feel like their on fire. Im wondering if the hot coolant is flowing through with out demanding it. I havent drove the truck in a while so Im questioning everything.
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I have a 2003 1.8t Jetta and I noticed my heater core is going bad (Common issue) so I smell G12 when I turn on my heat. But randomly and out of no where my car will start to over heat just a little. Never goes into the red though. Farthest it has ever been was about to the second mark past 190. It goes back down eventually and when I pop my hood it bubbles in the reserve a little and it does not do it again for about a few weeks or so. Could this be because of the heater core or might be a thermostat or bad coolant temp sensor?
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