Restoring heater box/A/C system

[elguadas]

Hello all,

This is my first post. Although, I've been a watcher and reader for a number of years. I've also used a lot of the tips and advise in this forum too. I have a 71 C10 LWB and over time have restored the front and rear suspension, power steering, brakes, 700r4 tranny swap, 3.73 gear differential upgrade, and many other details to list.

On to the question. My heater core went out a couple of years ago, so I decided to use the opportunity and restore that side at the time; it was a fairly easy project. Fast forward to now... I am almost done with restoring the factory A/C part. This project is taking more work, time and patience; but getting there. I ended having to replace the evaporator because the thin line that connects the the POA valve broke when I was removing it

I realized that Old Air is the only place that sells the correct expansion valve for my truck https://www.oldairproducts.com/produ...118014-c139005. I tried other sources, but what they sent was not the right fit.

I also decided to replace the old POA valve with the POA Upgrade kit https://www.oldairproducts.com/produ...122575-c157460.

I was also advised to add an cooling fan on the evaporator core to keep the high pressure side of the system under control. To do that I bought the fan, a relay and a trinary high pressure switch that gets attached to the top of the receiver/drier bottle. I couldn't find reasonable priced kit, so I bought these pieces separately. This link shows a picture of the trinary switch and most importantly the installation diagram https://www.vintageair.com/custom/pr...p?pn=11086-VUS I found a cheaper trinary switch on Amazon though.

The last part to complete my project is to replace the compressor. I purchased an OEM remanufactured one from Summit Racing, installed it, but it is hard to turn when the clutch is engaged with the system charged, so they are sending a replacement under warranty.

[Jcfcamaro]

Originally Posted by elguadas

Hello all,

This is my first post. Although, I've been a watcher and reader for a number of years. I've also used a lot of the tips and advise in this forum too. I have a 71 C10 LWB and over time have restored the front and rear suspension, power steering, brakes, 700r4 tranny swap, 3.73 gear differential upgrade, and many other details to list.

On to the question. My heater core went out a couple of years ago, so I decided to use the opportunity and restore that side at the time; it was a fairly easy project. Fast forward to now... I am almost done with restoring the factory A/C part. This project is taking more work, time and patience; but getting there. I ended having to replace the evaporator because the thin line that connects the the POA valve broke when I was removing it

I realized that Old Air is the only place that sells the correct expansion valve for my truck https://www.oldairproducts.com/produ...118014-c139005. I tried other sources, but what they sent was not the right fit.

I also decided to replace the old POA valve with the POA Upgrade kit https://www.oldairproducts.com/produ...122575-c157460.

I was also advised to add an cooling fan on the evaporator core to keep the high pressure side of the system under control. To do that I bought the fan, a relay and a trinary high pressure switch that gets attached to the top of the receiver/drier bottle. I couldn't find reasonable priced kit, so I bought these pieces separately. This link shows a picture of the trinary switch and most importantly the installation diagram https://www.vintageair.com/custom/pr...p?pn=11086-VUS I found a cheaper trinary switch on Amazon though.

The last part to complete my project is to replace the compressor. I purchased an OEM remanufactured one from Summit Racing, installed it, but it is hard to turn when the clutch is engaged with the system charged, so they are sending a replacement under warranty.

Not to be rude, but you should probably start your own post , otherwise my post is going to turn into something else.

[elguadas]

Originally Posted by Jcfcamaro

Not to be rude, but you should probably start your own post , otherwise my post is going to turn into something else.

Didn't intend to deviate from your post's question, rather trying to offer help from my own experience to tackle this job. My apologies if I went into too much detail.

[Jcfcamaro]

Originally Posted by elguadas

Didn't intend to deviate from your post's question, rather trying to offer help from my own experience to tackle this job. My apologies if I went into too much detail.

No problem. Good luck with your build.