69 stock heater control valve - Team Camaro Tech
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post #1 of 4 (permalink) Old Jun 19th, 17, 12:43 PM Thread Starter
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Ed
 
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69 stock heater control valve

It looks like my after market heater control valve isn't working as the temp of both hoses with a vacuum present it the same at about 180

As I look for a new one I noticed some sell OEM that have two areas right next to each other to hook up a vacuum line. My aftermarket has one. I looked at the assembly manual and it shows two.

The wiring diagram only shows one hose going to the valve.

Any idea how the OEM was hooked up? Maybe the other "nub" that looks like it will accept a vacuum line is something else.

Any idea?

Ed
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post #2 of 4 (permalink) Old Jun 19th, 17, 12:47 PM Thread Starter
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Ed
 
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Re: 69 stock heater control valve

Never mind... the other "nub" is solid.

Ed
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post #3 of 4 (permalink) Old Jul 26th, 17, 08:59 AM Thread Starter
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Ed
 
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Re: 69 stock heater control valve

I wanted to follow up with my results. When I purchased my 69, the AC had been poorly converted to R134 and barely worked. Oils had been mixed, etc, etc.

I rebuilt my stock AC system flushing it, adding the right oil, having my compressor rebuilt, NOS POA, and charging it with R12. I wasn't happy as my center vent temp was in the upper 50's. While I was happy it worked, I knew something was wrong.

First, I found that the vacuum line wasn't attached to the engine which meant the heater was running with the AC on. I fixed that by simply attaching the vacuum line.

Next, I figured out the after market heater control valve wasn't working. It had vacuum but wouldn't shut the flow of water.

Like many others I was tempted to put a manual valve on and call it good enough. I just bothered me that it lworked when new and I wanted to figure it out.

I was able to purchase an OEM heater control Valve off of eBay and installed it this morning.

Well, I'm happy to say that my AC is running in the low 40's!!

There's nothing more gratifying then solving an issue like this especially when it comes to AC's!!

Ed
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post #4 of 4 (permalink) Old Jul 26th, 17, 02:56 PM
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Re: 69 stock heater control valve

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