Heater core questions
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Posting Guru
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From: In the Middle
Heater core questions
Lucky me, I get to replace my heater core.
I have read the tech article, and it sounds real fun.
Do all A/C trucks have the standard output heater? What is a Hi-Lo vent system?
I would like to buy a new core before I tear it apart, but i don't know which one.
The truck is a '79 F150 2wd.
Thanks.
I have read the tech article, and it sounds real fun.
Do all A/C trucks have the standard output heater? What is a Hi-Lo vent system?
I would like to buy a new core before I tear it apart, but i don't know which one.
The truck is a '79 F150 2wd.
Thanks.
Postmaster
Joined: Feb 2003
Posts: 4,043
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I'm not sure about which core it is. I think if you tell the counter guy it's a 79 with AC he'll find the right one.
Hi-Lo should be a setting on the panel that will blow air out the floor and either dash or defrost vents.
It's not near as bad a job as it seems. Just take your time and you'll do fine.
Hi-Lo should be a setting on the panel that will blow air out the floor and either dash or defrost vents.
It's not near as bad a job as it seems. Just take your time and you'll do fine.
Senior User
Joined: Oct 2005
Posts: 114
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You might want to consider changing the blower motor while you are in there. The same amount of parts have to be removed to change the heater core or the blower motor.
In the 73-9 A/C equipped truck, the blower motors are mounted horizontally and the weight of the blower cgae tends to elongate the motor bearings. This causes the motor to drag internally and one of the advanced symptoms is a blown blower motor relay. If the shaft has any sideways play at all I would replace the motor.
John Pajak
1961 F100 Longbed Unibody
1976 F100 LWB
http://jspajak.tripod.com
In the 73-9 A/C equipped truck, the blower motors are mounted horizontally and the weight of the blower cgae tends to elongate the motor bearings. This causes the motor to drag internally and one of the advanced symptoms is a blown blower motor relay. If the shaft has any sideways play at all I would replace the motor.
John Pajak
1961 F100 Longbed Unibody
1976 F100 LWB
http://jspajak.tripod.com
Junior User
Joined: Mar 2005
Posts: 65
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I had to change mine and the job pretty much sucked. I have A/C. I too agree that you should change the blower at the same time. You don't want to have to do this again when your fan goes out. The fan is around 30 bucks. Also I had to take my core to the parts stort to compare with the new one. The one the computer showed would not fit.
