Additional valve inline with heater bypass...

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Stresst

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Can someone refresh my memory on where I would install the additional valve to stop the flow of coolant to the heater core on my 2000 Escalade w/ 5.7L ?

Between the factory black plastic valve and the firewall correct? On the 5/8" or 3/4" line?

Thanks in advance!
 
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retorq

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That black plastic valve shouldn't allow fluid thru unless there is vacuum applied to it ...
 

SunlitComet

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Can someone refresh my memory on where I would install the additional valve to stop the flow of coolant to the heater core on my 2000 Escalade w/ 5.7L ?

Between the factory black plastic valve and the firewall correct? On the 5/8" or 3/4" line?

Thanks in advance!


Why do you need to do this?
 
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Stresst

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Why do you need to do this?

Honestly?? Cause im preparing myself for this effein a/c not work properly.......LOL

For real, many have said they seen drastic improvements with the valve in place. They mentioned that they never seen a factory valve shut the flow completely. Figured it cant hurt. And being I paid less then 6 bucks I have to agree.
 

SunlitComet

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I would not want it to close completely either because of expansion. Something go wrong with latest repairs?

---------- Post added at 02:18 PM ---------- Previous post was at 02:11 PM ----------

But if you must, on the core connections on the firewall the one closest to engine is the feedwater line to the core.
 
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Stresst

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I picked up the truck yesterday but the electric fan was disconnected so I was to bring it back this morning. Upon picking up the truck yesterday it was already idling when I got there the temp out of the center guage was around 58 at idle. Brought it up to 1400-1600rpm and the temp began to fall. I was in a rush so I got in the truck and left, it was actually comfortable and it was near 90 and humid. Mind you the fan was not connected. FWIW: In the past 84-88 degrees outside and it was begun to not work properly so I figured it was sure a good start.

I went to pick the truck up tonite again when I got there it was idling, electric fan working properly. He told me he added a lb of freon. At idle it felt good, I shut the fan off the temp began to rise, turned it back on and it decreased. Again I was in a rush to get somewhere so I left. I had to go up a busy 2 lane each direction street in rush hour and started to hit red light after red light. The temp began to rise big time, before I knew it it was 77 inside. I turned rite around and went back, they poked around a bit, evacuated and recharged. It feels somewhat like what it felt like yesterday but there is still something evidently wrong. Comming home at red light it would go from 55 to 65 degrees in less then 2 minutes.

I have to bring it back AGAIN tomorrow, he thinks it a blend door issue. I thought we already ruled this out. But I guess not. This is friggen ridiculous!

I had a really bad day, I know they are not a/c specialists so please I dont need to be reminded.
 
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Stresst

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Anyone know where I can find the temp/pressure chart for the a/c systems?
 

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