How do I replace the heater core w/no a/c

Asked by Mar 10, 2007 at 08:17 PM about the 1978 Ford F-150

Question type: Maintenance & Repair

I have a stock 1978 Ford F150 p/u.  I looked under the hood and the firewall and I see where the two hoses are clamped onto the firewall.  I went into the truck and there's a hard plastic type of cover running from the far right side of the truck to about the middle of the interior, under the bottom under the dash.  Its visible from the passenger seat. I think this houses maybe the heater core, I'm not sure.  I tried to remove the glove box w/o success.  I moved the carboard interior of the glove box aside a little but this didn't help.  Pls. help me to figure out how to get the old one out and new one in.  Cold and wet in Seattle and I'm afraid to use my heater as it drips on the passenger floor board.  Pls. Help!
Thank You,


5 Answers


Hello Bradley-- Go to the following site for help to replace the heater core on your 1978 Ford F150-- Good luck from Bovan.

5 of 5 people found this helpful.

Brad, It is a pain but can be done in about three hours. You have to remove the bolts and nuts that hold the box under the hood. They are under the dash and you do have to remove the glove box. Just take your time and be patient. If it is a 351 or 400m the box is a nightmare to get past the corner of the head, but again it can be done.You may have to remove the valve cover. If its a 302,cake. Be careful not to crack the box getting it out. Hope this helps. Also borrow a garage if you don't have one, outside is not a good place to make this repair.

1 of 1 people found this helpful.

I took the heater core out of mine 20 yrs ago and could not get it out from under the dash but removed the blower and cover, then had to disconnect the a/c line.

1 of 1 people found this helpful.

my pick up truck is a 1977 150 with a 351 eng. and does not have A.C so is it easier to re move the heater core. I noticed my leaks water and I would like to have this water leak fixed/ tony

If you do not have A/C you will need to drill out the rivets holding the cover on the blower motor and heater core housing, its kind of a pain in the ass, and is A LOT easier if you take the dash off as it exposes all of the housing and all of the rivets

Your Answer

Add photo

Related Questions

  • 1982 Tercel 1 answer

    I have a 1982 Toyota Tercel bought in Yorkton Sask. in 1984 with 15,000 km on it. In 1986 I had it shipped to Yellowknife where I drive it very little, and in the last few years, not at all in the win...

    1982 Toyota Tercel


    Shopping & Pricing


Looking for a Used F-150 in your area?

CarGurus has 206,316 nationwide F-150 listings starting at $1,499.


Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
Reputation 7,940
#2 dandyoun
Reputation 4,370
#3 tennisshoes
Reputation 2,790
View All

Related Models For Sale

Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Ford F-250
481 listings starting at $3,475

Used Cars For Sale

2017 Ford F-150 For Sale
32 Great Deals out of 128,121 listings starting at $18,445
2016 Ford F-150 For Sale
123 Great Deals out of 17,380 listings starting at $18,848
2015 Ford F-150 For Sale
186 Great Deals out of 7,904 listings starting at $17,900
2014 Ford F-150 For Sale
381 Great Deals out of 12,590 listings starting at $7,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.