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77 D100 heater core #1631731 06/10/14 04:31 PM 06/10/14 04:31 PM
Joined: Dec 2009 Posts: 24 Pasadena, CA YellowD100 OP member
YellowD100 OP member Joined: Dec 2009 Posts: 24 Pasadena, CA	The heater core in my 1977 D100 (no A/C) started leaking yesterday, and completely soaked my carpet. Before I attempt to take everything apart to fix the problem, does anyone have any tips for what I need to look out for when I take it apart? Any suggestions would be appreciated.

Re: 77 D100 heater core [Re: YellowD100] #1631732 06/10/14 06:02 PM 06/10/14 06:02 PM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	have a new replacement standing by to replace the old leaky one... I am truckless..

Re: 77 D100 heater core [Re: 340SHORTY] #1631733 06/15/14 03:29 AM 06/15/14 03:29 AM
Joined: Jan 2003 Posts: 4,196 Canada -- Posts: 4034 -Registe... 5 5thAve Doesn't care what this says anyway
5thAve Doesn't care what this says anyway 5 Joined: Jan 2003 Posts: 4,196 Canada -- Posts: 4034 -Registe...	If it's the same as my 79 it's the easiest heater core I've done.

Re: 77 D100 heater core [Re: YellowD100] #1631734 06/15/14 02:10 PM 06/15/14 02:10 PM
Joined: Apr 2010 Posts: 10,570 Sunny South Florida Golden-Arm I Live Here
Golden-Arm I Live Here Joined: Apr 2010 Posts: 10,570 Sunny South Florida	while you're waiting, you can cap off the nipples, that supply the core, so you can still drive, while waiting to round up your parts. some of us, in warmer parts of the world, just bypass the heater entirely.... "When Tyranny Becomes Law, Rebellion Becomes Duty"

Re: 77 D100 heater core [Re: YellowD100] #1631735 06/16/14 12:45 PM 06/16/14 12:45 PM
Joined: Jan 2010 Posts: 1,944 woodcrest, CA magnum440d100 top fuel
magnum440d100 top fuel Joined: Jan 2010 Posts: 1,944 woodcrest, CA	Quote: The heater core in my 1977 D100 (no A/C) started leaking yesterday, and completely soaked my carpet. Before I attempt to take everything apart to fix the problem, does anyone have any tips for what I need to look out for when I take it apart? Any suggestions would be appreciated. I have a complete firewall that I from a 77 you can come get or practice on. Still has the heater box. Going to scrap soon. Pretty simple too. Depending on brand, the replacement heater core fills the whole plate. At least on my 72

Re: 77 D100 heater core [Re: magnum440d100] #1631736 06/16/14 03:42 PM 06/16/14 03:42 PM
Joined: Aug 2006 Posts: 8,064 Iowa 76dodgeboy master
76dodgeboy master Joined: Aug 2006 Posts: 8,064 Iowa	My 73 the nuts on the engine bay side didnt all come off. So I had to chnge it with the heater box installed. Far right side will have a couple screws that can only be removed if the box is. I broke it off. Didnt cause any real damage and went back together just fine.

Re: 77 D100 heater core [Re: 76dodgeboy] #1631737 06/16/14 06:19 PM 06/16/14 06:19 PM
Joined: Jan 2010 Posts: 1,944 woodcrest, CA magnum440d100 top fuel
magnum440d100 top fuel Joined: Jan 2010 Posts: 1,944 woodcrest, CA	Quote: My 73 the nuts on the engine bay side didnt all come off. So I had to chnge it with the heater box installed. Far right side will have a couple screws that can only be removed if the box is. I broke it off. Didnt cause any real damage and went back together just fine. Ah. My 72 I was able to swap cores with it installed. Took every little screw out. I don't remember having to break any screws though Also replaced the foam while I was at it

Re: 77 D100 heater core [Re: magnum440d100] #1631738 06/16/14 08:53 PM 06/16/14 08:53 PM
Joined: Jan 2003 Posts: 4,196 Canada -- Posts: 4034 -Registe... 5 5thAve Doesn't care what this says anyway
5thAve Doesn't care what this says anyway 5 Joined: Jan 2003 Posts: 4,196 Canada -- Posts: 4034 -Registe...	Quote: Quote: My 73 the nuts on the engine bay side didnt all come off. So I had to chnge it with the heater box installed. Far right side will have a couple screws that can only be removed if the box is. I broke it off. Didnt cause any real damage and went back together just fine. Ah. My 72 I was able to swap cores with it installed. Took every little screw out. I don't remember having to break any screws though Also replaced the foam while I was at it I did mine that way too with my 79 and I had no problem getting all the screws out without breaking anything. My new heater core was almost the size of the plate too and a couple of the screw holes didn't line up so I had to cut them a bit.

Re: 77 D100 heater core [Re: 5thAve] #1631739 06/17/14 12:00 AM 06/17/14 12:00 AM
Joined: Feb 2011 Posts: 440 Marysville, WA 77ProStreet mopar
77ProStreet mopar Joined: Feb 2011 Posts: 440 Marysville, WA	I did mine that way too with my 79 and I had no problem getting all the screws out without breaking anything. My new heater core was almost the size of the plate too and a couple of the screw holes didn't line up so I had to cut them a bit. My new heater core was the same way. Plate was bigger but still fit fine and had to massage a couple of the mounting holes.

Re: 77 D100 heater core [Re: 77ProStreet] #1631740 06/27/14 09:04 PM 06/27/14 09:04 PM
Joined: Dec 2009 Posts: 24 Pasadena, CA YellowD100 OP member
YellowD100 OP member Joined: Dec 2009 Posts: 24 Pasadena, CA	Thank you everyone for all of the advice. Unfortunately work is really busy right now ant the truck is just sitting in the garage. Bypassing the heater all together was my first thought, and probably will still do that for the short term. Hopefully I will be able to fix this by the end of next month. magnum440d100 Thanks for the offer, I am tempted to take you up on it, but would not be able to get out there for a few weeks. ********************************** 1977 D-100 Adventurer SE Utiline 360 727 2010 Ram 1500 CrewCab 5.7 4x4

Re: 77 D100 heater core [Re: YellowD100] #1631741 10/20/14 07:05 PM 10/20/14 07:05 PM
Joined: Dec 2009 Posts: 24 Pasadena, CA YellowD100 OP member
YellowD100 OP member Joined: Dec 2009 Posts: 24 Pasadena, CA	I finally had time to remove the heater core. Attached is a picture of the heater vent door. Does anyone know where I can get a replacement for the foam that covers this to seal the air out, or an idea for a replacement? As it is now it crumbles to the touch. Thanks 8306630-a20141018_112939.jpg (48 downloads) ********************************** 1977 D-100 Adventurer SE Utiline 360 727 2010 Ram 1500 CrewCab 5.7 4x4

Re: 77 D100 heater core [Re: YellowD100] #1631742 10/22/14 02:20 AM 10/22/14 02:20 AM
Joined: Jan 2003 Posts: 4,196 Canada -- Posts: 4034 -Registe... 5 5thAve Doesn't care what this says anyway
5thAve Doesn't care what this says anyway 5 Joined: Jan 2003 Posts: 4,196 Canada -- Posts: 4034 -Registe...	When I did mine I scraped off the loose stuff and just put some thin wide foam tape around the perimeter of it.

Re: 77 D100 heater core [Re: 5thAve] #1631743 10/22/14 03:06 AM 10/22/14 03:06 AM
Joined: Apr 2010 Posts: 10,570 Sunny South Florida Golden-Arm I Live Here
Golden-Arm I Live Here Joined: Apr 2010 Posts: 10,570 Sunny South Florida	hit up google, and look at open cell foam tapes, as mentioned by 5th. big box stores might have a selection as well, just remember open cells, not closed. "When Tyranny Becomes Law, Rebellion Becomes Duty"

Re: 77 D100 heater core [Re: Golden-Arm] #1631744 10/22/14 07:04 PM 10/22/14 07:04 PM
Joined: Dec 2009 Posts: 24 Pasadena, CA YellowD100 OP member
YellowD100 OP member Joined: Dec 2009 Posts: 24 Pasadena, CA	Thanks for the ideas. I am also talking with Jim from Detroit Muscle Technologies. He is in the process of making a complete set of gaskets for these heater boxes. ********************************** 1977 D-100 Adventurer SE Utiline 360 727 2010 Ram 1500 CrewCab 5.7 4x4

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