85-305 heater thread

[Demon]

You can absolutely isolate the core and flush, work well. If you go it that way, make sure you are back flushing the core.

Cat makes a really good cooling system cleaner.

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[Ron's Power Stroke]

I got a dodge 1500 4x4 for a winter rig... I could not get any heat at all..even when it was 40 out side... I pulled both the heater hoses and blew out all coolant with air.. even the air had a hard time blowing though.. I dumped in some toilet drain flush called THE WORKS till it started to come out the hose at the other end.. let it sit for about 15 minutes.. blow it out..flush with lots of water.. repeat if you feel the need... when done fill the core with coolant..hook up lines and feel the heat... you should see what THE WORKS does when it is poured into a plastic soda bottle with a piece of tin foil.....:jawdrop:

 

[Freightshaker]

85-305... You said in another thread a GC owned your truck and switches and such had to be cleaned it was so dirty. If it was that dirty it would be wise to clean the air side of your heater core and I would say your evap needs a bath too.

 

[Demon]

I already told him to replace it. At the very least, pull it out and clean it properly.

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[Freightshaker]

I already told him to replace it. At the very least, pull it out and clean it properly.

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10-4 sorry was a while since I read entire thread.

 

[Demon]

He keeps saying it's "alot of work" to pull the heater core. Trying to talk himself out of fixing it right. You can lead a horse to water.......

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[85_305]

The ford pump is a Motocraft part on a international 7.3. It is aluminum, both necks are stamped bolt on steel, and uses a special thermostat.
The INternational water pump is on 7.3s in international trucks. It is steel, only uses the stamped steel t stat neck, Uses a standard automotive thermostat, and best of all it has a built in spot for a spin on filter, and a
New installed(not a swap for dual alternator trucks)

As for your heater core I would just try to clean it on the water side and the air side. Check temperature differences on water in/out and air in/out before and after. Last resort would be to change it.

The IH is twice as big... looks like a good unit. good input

I got a dodge 1500 4x4 for a winter rig... I could not get any heat at all..even when it was 40 out side... I pulled both the heater hoses and blew out all coolant with air.. even the air had a hard time blowing though.. I dumped in some toilet drain flush called THE WORKS till it started to come out the hose at the other end.. let it sit for about 15 minutes.. blow it out..flush with lots of water.. repeat if you feel the need... when done fill the core with coolant..hook up lines and feel the heat... you should see what THE WORKS does when it is poured into a plastic soda bottle with a piece of tin foil.....:jawdrop:

The Works wont destroy the cooling system in these? I like the idea of that as long as its safe.

85-305... You said in another thread a GC owned your truck and switches and such had to be cleaned it was so dirty. If it was that dirty it would be wise to clean the air side of your heater core and I would say your evap needs a bath too.

Yep a GC did own my truck. How do you clean the air side of the heater core? I've never really done much work on them thankfully. And the evap?

He keeps saying it's "alot of work" to pull the heater core. Trying to talk himself out of fixing it right. You can lead a horse to water.......

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going by my experience on my car, yes the heater-core is one of the last things I'd rather do... although I have no experience on the powerstroke doing it.

 

[4.0l sahara]

google.....
http://www.youtube.com/watch?v=hr2I0vNNreg

Are both your heater hoses hot? Blend door working?

 

[85_305]

^Gonna watch the video, thanks.

Blend door works afaik.... I can change where I direct the air w/out issue. Heater hoses being hot.... simple question, retarded answer... I've never checked :doh: Next time I start it I will though. I'm assuming the hoses are hot, so what would that mean?

 

[Freightshaker]

The IH is twice as big... looks like a good unit. good input



The Works wont destroy the cooling system in these? I like the idea of that as long as its safe.



Yep a GC did own my truck. How do you clean the air side of the heater core? I've never really done much work on them thankfully. And the evap?



going by my experience on my car, yes the heater-core is one of the last things I'd rather do... although I have no experience on the powerstroke doing it.

I am in no way knocking his method. It worked for him. Heat exchanging is my trade and I have acidized a lot of heat exchangers. The only thing I will say about that is more of a personal disclaimer. Whatever chemical I would choose for cleaning a heat exchanger, I would make sure it is safe for all the metals and synthetic materials involved. Also follow manufacturers recommendations.

Thankfully I have not had to pull or clean heater core or evap. So I am in the dark there. Like me and other posters stated check and compare temps. Does your a/c work great? It won't if it is down on airflow.(if you even use A/C) It may just boil down to everything is filthy: blower, heater core, and evap. You have a lot of stuff on here to get a great start down a cold frustrating road.

 

[85_305]

AC is cold and works as it should... only thing really noticeably wrong w/ the hvac system is the fan speed setting is stuck on high, and the air isn't really "voluminous" if that makes sense? Even tho the ac is ice cold, it must be on the high setting in order to stay cool. The heat MUST be on the high setting when its 20*f or colder or else you dont really warm up. The air isn't super powerful and the incoming air isn't very hot.

 

[Freightshaker]

AC is cold and works as it should... only thing really noticeably wrong w/ the hvac system is the fan speed setting is stuck on high, and the air isn't really "voluminous" if that makes sense? Even tho the ac is ice cold, it must be on the high setting in order to stay cool. The heat MUST be on the high setting when its 20*f or colder or else you dont really warm up. The air isn't super powerful and the incoming air isn't very hot.

Based on that statement IMO your down on airflow. Your A/C is cold as ice probably because your trucks history of filth. If you are down on airflow the gentle breeze coming out of your vent is as cold as ice because the dirt has turned your air conditioner into an ice maker. In the world of HVAC if your A/C and heat suck the thing that effects them both is airflow.

 

[85_305]

Well the AC sucked ass until I put some synthetic refrigerant into it this past summer.. but in order to actually stay cool in our "hot" 70-80* summers, it MUST be on max the whole time.

So basically you are saying me entire issue is airflow? Where do I start w/ that one, the evap? The vents?

 

[Freightshaker]

Well the AC sucked ass until I put some synthetic refrigerant into it this past summer.. but in order to actually stay cool in our "hot" 70-80* summers, it MUST be on max the whole time.

So basically you are saying me entire issue is airflow? Where do I start w/ that one, the evap? The vents?

Hahaha "when the AC don't work add some more freezon!" I have backed so much 134A out of mobile AC it's not even funny. When your AC doesnt cool like it should 134A should not be the first thing you reach for. Unless you know for a fact it is low. There is a good possibility now (unless you weighed it in) you have overcharged your AC because of an airflow problem. Airflow is the common link between your heating and cooling.


By the way all 134A is synthetic. 134a is 134a I don't care how flashy the can is.

 

[4.0l sahara]

^Gonna watch the video, thanks.

Blend door works afaik.... I can change where I direct the air w/out issue. Heater hoses being hot.... simple question, retarded answer... I've never checked :doh: Next time I start it I will though. I'm assuming the hoses are hot, so what would that mean?

They should both be very hot if it has good flow. that doesn't mean that the inside isn't coated with crap tho....

 

[85_305]

Hahaha "when the AC don't work add some more freezon!" I have backed so much 134A out of mobile AC it's not even funny. When your AC doesnt cool like it should 134A should not be the first thing you reach for. Unless you know for a fact it is low. There is a good possibility now (unless you weighed it in) you have overcharged your AC because of an airflow problem. Airflow is the common link between your heating and cooling.


By the way all 134A is synthetic. 134a is 134a I don't care how flashy the can is.

The pressures were noticeably down when I stuck a gauge onto the AC system... I was going by pressure compared to ambient air temps. Although, I sure appreciate knowing that ALL 134a is synthetic LOL But I swear that arctic-freeze stuff is far colder than normal stuff.

Where do I begin w/ troubleshooting airflow tho?

They should both be very hot if it has good flow. that doesn't mean that the inside isn't coated with crap tho....

I will 100% check this next time the trucks running. But I seem to recall orange crap in the coolant when I checked last... thats what makes me think I need to flush it.

 

[Freightshaker]

The pressures were noticeably down when I stuck a gauge onto the AC system... I was going by pressure compared to ambient air temps. Although, I sure appreciate knowing that ALL 134a is synthetic LOL But I swear that arctic-freeze stuff is far colder than normal stuff.

Where do I begin w/ troubleshooting airflow tho?



I will 100% check this next time the trucks running. But I seem to recall orange crap in the coolant when I checked last... thats what makes me think I need to flush it.

What is it going to hurt to do a maintenance on your cooling system. Flush it good! Check your hoses and other stuff. Use distilled water. You will be out some money and time but you would gain peace of mind and know everything is up to snuff.

If you charged your AC by pressure and not weighing it and you have a dirty evap and blower $50 says it is overcharged. There are a lot more factors to getting cold air than adding "FREEZON"

As for your airflow... You probably need to inspect and clean your 3 main components: blower, evap, heater core. Yea I know that sucks, but remember the trucks history.

This is all a matter of my opinion. Do with it what you like.

 

[85_305]

I've never had this kinda issue before so I wasn't sure where to start. When it warms up a bit I'm def gonna check those 3 things that could be hampering air flow. Never even thought to check the blower... wonder how many inches of dust and dirt are on that lmao.... do tehse trucks have cabin air filters?????????????????? If so, holy ****....

 

[Freightshaker]

That is usually the first thing I go for in newer vehicles. Nobody knows they are there but they want me to come over and add some "freezon" because their AC is lacking. I doubt you have one. It would be nice if they started using them a long time ago so you wouldn't have to dig deep cleaning everything.

 

[85_305]

Ah so no cabin filter means going thru the blower/vents/ducting manually :doh: Great.