AC and Heater deleted!

[JD's American car]

So my big green 2door 73 lebaron seems to be missing something. No AutoTemp servo. Not sure about the amplifier? Heating hose loops back to motor.
The heater core could be defective?

Looking at the cost of replacing the servo unit, amplifier and upgrading the system to R134a or similar. I am thinking going to replace it with an aftermarket HVAC evaporator core. Manual/ electric heater valve .

Autotemp servo replacement $765+ at least $300+ for the amplifier, $100 shipping.

80% of the time i can manage without ac. Having no heater is out the question.

 

[JD's American car]

Has anyone fitted a Classic/vintage/old air hvac system or similar. ?
I have researched products like Classic air etc, but they have quoted $1019 shipping! This makes buying the whole package more than $3500...

I will reconnect the heater core to see if there are any leaks..will try a manual heater valve, and see if I can jump the blower motor with switch. Might get some heating.

 

[mopar preferred]

I'd bet you will need to replace the heater core. Replace the evaporator st the same time. It likely means also, or will soon.

 

[CBODY67]

All in all, your initial sticker shock at the orig-type parts might shrink compared to dong something aftermarket. Hence, putting it back to OEM-style stock can be the least work, too.

Yep, the related heater core probably needs replacing/cleaned out, too.

Considering you are in the UK, plus the fact that Mercedes used the servo, PERHAPS you might network with a Mercedes hvac tech for upgraded Mercedes control items? Most of which would be sourced from your "side of the water", hopefully.

Might ALSO network with some of the operatives at www.bbtr.de for parts sources over there, too? Might need to manually input that address. Seems like there are some Mopar parts operatives in Germany, too? In other words, there CAN be more Chrysler Corp resources "over there" than you might suspect!

To me, the ONLY Upgrades I'd do is to use a Sanden compressor and find a parallel flow condenser for the R-134a system. Maybe an expansion valve for R-134a too (see related thread on such an expansion valve in here, from a few months ago).

Just some thoughts and observations,
CBODY67

 

[JD's American car]

All in all, your initial sticker shock at the orig-type parts might shrink compared to dong something aftermarket. Hence, putting it back to OEM-style stock can be the least work, too.

Yep, the related heater core probably needs replacing/cleaned out, too.

Considering you are in the UK, plus the fact that Mercedes used the servo, PERHAPS you might network with a Mercedes hvac tech for upgraded Mercedes control items? Most of which would be sourced from your "side of the water", hopefully.

Might ALSO network with some of the operatives at www.bbtr.de for parts sources over there, too? Might need to manually input that address. Seems like there are some Mopar parts operatives in Germany, too? In other words, there CAN be more Chrysler Corp resources "over there" than you might suspect!

To me, the ONLY Upgrades I'd do is to use a Sanden compressor and find a parallel flow condenser for the R-134a system. Maybe an expansion valve for R-134a too (see related thread on such an expansion valve in here, from a few months ago).

Just some thoughts and observations,
CBODY67

Thank you for your reply. It has given me a clearer picture of a route to start.
First, test the heater core. I will remove the carpet ( it's new) before I connect it up. Taking the carpet out is something I was planning on anyway so as to get an inspection of the floors.
If it is good then a replacement servo unit fitted and see what happens there.

As for the AC, I had in mind a new compressor, hoses,valve, drier, and PFlow condenser. These things I will have to do even if I go the aftermarket route.

What model Sanden compressor did you fit? They seem to be different sizes? up to about 150cc?
Did you get a special bracket? I've seen a couple of places selling them.

The group support is brilliant

 

[Big_John]

What model Sanden compressor did you fit? They seem to be different sizes? up to about 150cc?
Did you get a special bracket? I've seen a couple of places selling them.

When I did the conversion on my '70 300, I used Products: Air Conditioning - Bouchillon Performance Engineering for their kit.

It seems to me that you could buy most of what you need, or at least the Sanden compressor without shipping it from the USA. I used their SD-508 clone. The clone compressors are a lot cheaper, but sometimes that might be a gamble. Since I was buying their kit, I went with it and haven't had a problem.

Overseas shipping prices seems to have gone insane lately.

 

[jet1969]

Thank you for your reply. It has given me a clearer picture of a route to start.
First, test the heater core. I will remove the carpet ( it's new) before I connect it up. Taking the carpet out is something I was planning on anyway so as to get an inspection of the floors.
If it is good then a replacement servo unit fitted and see what happens there.

As for the AC, I had in mind a new compressor, hoses,valve, drier, and PFlow condenser. These things I will have to do even if I go the aftermarket route.

What model Sanden compressor did you fit? They seem to be different sizes? up to about 150cc?
Did you get a special bracket? I've seen a couple of places selling them.

The group support is brilliant

JD you already have these links I think but maybe it helps


UnwiredTools, LLC.

Early Climate Control System Part 2: System Troubleshooting and Repairing - On Demand Video | Product | MercedesSource.com

Climate Control - Performance Analysis Company

 

[JD's American car]

JD you already have these links I think but maybe it helps


UnwiredTools, LLC.

Early Climate Control System Part 2: System Troubleshooting and Repairing - On Demand Video | Product | MercedesSource.com

Climate Control - Performance Analysis Company

Thank you for the links. I am weighing up the way to move forward. It really helps knowing there are solutions that can be looked into.

 

[JD's American car]

So I put this bypass heater valve on to see what happens... no prizes for the answer..! A dribble of steaming coolant all over the footwell

My question. Can the heater core be replaced without removing the entire unit?

If the unit needs to come out, can you do this without dismantling the lower dash?

 

[Big_John]

So I put this bypass heater valve on to see what happens... no prizes for the answer..! A dribble of steaming coolant all over the footwear.

My question. Can the heater core be replaced without removing the entire unit?

If the unit needs to come out, can you do this without dismantling the lower dash?

View attachment 739321

The service manual should have a decent procedure. Service Manuals – MyMopar has a '72 version to download and that may be close enough... I don't know. I strongly suggest getting the proper factory service manual though. Something everyone should have.

 

[JD's American car]

The service manual should have a decent procedure. Service Manuals – MyMopar has a '72 version to download and that may be close enough... I don't know. I strongly suggest getting the proper factory service manual though. Something everyone should have.

Thanks for the link...That's great. I have bought the 73 ones (hard copy- body & chassis) waiting for them to arrive. This will give me something to research for now.

I also am sure there is some kind of vacuum canister removed.. does anyone have pictures of near the front above the horns?

 

[Big_John]

I also am sure there is some kind of vacuum canister removed.. does anyone have pictures of near the front above the horns?

I think that's the vapor canister, part of the emissions system, that is missing. It basically allows external air to come into the carb and gas tank, but doesn't allow the fuel to evaporate into the atmosphere.

Looks something like this:

 

[JD's American car]

I think that's the vapor canister, part of the emissions system, that is missing. It basically allows external air to come into the carb and gas tank, but doesn't allow the fuel to evaporate into the atmosphere.

Looks something like this:

View attachment 739330

That's helpful. Nothing to do the the AC. Is there any vacuum reserve tank somewhere?

 

[Big_John]

Is there any vacuum reserve tank somewhere?

I don't think so, but there's other guys much more familiar with '73 Imperials that can probably tell you for sure.

 

[CBODY67]

All in all, your initial sticker shock at the orig-type parts might shrink compared to dong something aftermarket. Hence, putting it back to OEM-style stock can be the least work, too.

Yep, the related heater core probably needs replacing/cleaned out, too.

Considering you are in the UK, plus the fact that Mercedes used the servo, PERHAPS you might network with a Mercedes hvac tech for upgraded Mercedes control items? Most of which would be sourced from your "side of the water", hopefully.

Might ALSO network with some of the operatives at www.bbtr.de for parts sources over there, too? Might need to manually input that address. Seems like there are some Mopar parts operatives in Germany, too? In other words, there CAN be more Chrysler Corp resources "over there" than you might suspect!

To me, the ONLY Upgrades I'd do is to use a Sanden compressor and find a parallel flow condenser for the R-134a system. Maybe an expansion valve for R-134a too (see related thread on such an expansion valve in here, from a few months ago).

Just some thoughts and observations,
CBODY67

@ScottinSF , what is your point of "disapproval"? Just curious. Perhaps we can all learn something?

CBODY67

 

[ScottinSF]

@ScottinSF , what is your point of "disapproval"? Just curious. Perhaps we can all learn something?

CBODY67

My disapproval is mearly fat fingers. I’m sorry I didn’t notice I had hit the red X. It’s not the first time it has happened with me. Truthfully I wish they would get rid of that option. Again I apologize, there was absolutely nothing wrong with your post.

 

[CBODY67]

Thanks for that reply. I appreciate the verification!

CBODY67

 

[fantomas071]

I have the same problem,
how do I turn on the heating?
My blower isn't working.
I also want to install a standard valve for the heater.

 

[JD's American car]

I have the same problem,
how do I turn on the heating?
My blower isn't working.
I also want to install a standard valve for the heater.

I assume you have a car(what model?) with auto temp 2? Do you still have the auto temp servo?
There could be many reasons why your heater is not working. Has it worked in the past? Faulty amplifier, vacuum leaks, faulty check valves etc. There are many threads on ac/heater HVAC on the forums.

 

[fantomas071]

I assume you have a car(what model?) with auto temp 2? Do you still have the auto temp servo?
There could be many reasons why your heater is not working. Has it worked in the past? Faulty amplifier, vacuum leaks, faulty check valves etc. There are many threads on ac/heater HVAC on the forums.

imperial 72 Auto Temp II ,the blower doesn't work, there's no heating