While your in there ( Heater core )

[Sly_Jeeper]

One thing led to another looking to replace a bad heater core i removed the dash heater box peeked under the carpet and it felt was soaked, i bypassed the leaking heater core last year but it looks like the carpet held in moisture. Also removed all the foam/vinyl up by the firewall and am now thinking of raptor lining the inside of the cab and finding another method for heating to avoid the dash removal in the future…i found out we’ve only got minor rust on the floor pans so at least thats a plus wonder what that bagged material was for on the passenger floor?

 

 

 

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[watchamakalit]

Holy smokes. If my interior looked half that good when it stripped it is would have been impressed. Thats probably the cleanest ive ever seen.

[ghetdjc320]

1 hour ago, watchamakalit said:

Holy smokes. If my interior looked half that good when it stripped it is would have been impressed. Thats probably the cleanest ive ever seen.

That’s exactly what I was thinking. That’s less rust then they came with from the factory!

[A-man930]

13 hours ago, Sly_Jeeper said:

 

...finding another method for heating to avoid the dash removal in the future…

 

While I understand your general thought here, I think you're overdoing it. With a properly maintained cooling system and good electrical grounds, you really shouldn't have to change out a heater core ever again.  What's the alternative anyways? Electric heat? Some would call that pissing in the wind because you're just going to overwork your vehicle's charging system and it won't produce as much heat.  Engine coolant flow through the heater core is pretty well like a free lunch; the coolant gets hot anyways, might as well put it to some use.  

[75sv1]

Let's see, the heater core held up about 30 years. Don't know how the cooling system was treated during that time. So, I'd reinstall a copper-brass heater core. Update the A/C. I'd treat the rust with POR-15 and their rust treater. Possibly, Lizard sin for acoustics. Raptor lining etc. would be good too. The plastic bag is for acoustics or heat. I'd look at the recent thread for heater box regen. 

[75sv1]

 

[Sly_Jeeper]

Thank you for the suggestions, i would not put anymore on the motor, these things run great as is, i was thinking good insulation for the firewall, back and doors, and raptor lining the floors in the case of a small water crossing and getting water on the floors. Electric heat would have to come from a rear mounted battery bank powering other accessories as well. For now these are just ideas, i understand that a good heater core replacement should do the trick. Thanks again for the info and advice. Lets keep these jeeps on the road and be creative


88’ Renix Manual 2wd Sportruck

[AZJeff]

There are several reasons why auto makers have used HVAC systems that employ a small radiator to provide cabin heat.   The biggest of which, of course, is that an internal combustion engine (ICE) generates LOTS of excess heat, so using it to heat the cabin is "free" so to speak.

 

Electric vehicles don't have that luxury, of course.  However, they have NOT chosen to use what is commonly called "resistive electric heating," mainly because it is HORRIBLY energy inefficient.   What they do instead is to employ a heat pump, which is an air conditioner in reverse.   This solution is EXPENSIVE, and thus it's the primary reason that cars with an ICE don't use it.

 

Others have pointed out that a properly maintained cooling system will allow an ICE equipped car with a traditional heater core to last MANY, MANY years.   Going to the trouble/expense of trying to remove the heater core as a failure point might end up introducing a WHOLE BUNCH of other more complicated/expensive pieces in your solution.

[MiNi Beast]

That bag is insulation as the floor gets hot with the cat just under the floor. As the black foam on the firewall is also for heat. I removed my ac/heater core box a while ago. (Less weight and wiring) 

So currently have no plumbing issues as have no heater core. Jeep gets warmer the longer you drive and actully will heat the cab up eventually in my highway commutes.  however lately with the snow and all, the holes in the firewall just arent cutting it, in means of taking the chill out of the cab.  If I wasnt to worried about weight savi gs I most definitely would install another heater box, kinda in a means of necessity and creature comforts.  I recommend install a replacement and honestly be worry free from redoing what a good job you would do on the replacement.  And I also would like to add perhaps check your seals for leaks. As common as it has been found, some have fould leaks from the crowl area or windshield gasket, door seal and even found water coming in on the antenna cable from behind the fender.  worth a double check to ensure your floors stay in such great shape. I'm almost Flintstoning mine. 

[Sly_Jeeper]

Thanks guys looks like I’ve got some thinking to do before i make things more complicated than they should be, I truly appreciate all the info. This community is awesome full of tips, tricks and stories from experience feels like a classroom i want to be in


88’ Renix Manual 2wd Sportruck

[Sly_Jeeper]

Update nothing major


88’ Renix Manual 2wd Sportruck

[87MJJeep]

On 4/6/2022 at 12:37 AM, Sly_Jeeper said:

Update nothing major


88’ Renix Manual 2wd Sportruck

 

Very nice!