A/C heater shut off valve?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luis_gz06 · 10-23-2012, 09:54 PM

Anyone know how the heater shut off valve is mounted correctly on a 72 inner fender? I replaced my rusty inner fender years ago, and replaced it with a non a/c truck inner fender. So theres no drilled holes for it. I see that theres pre dimpled dots to drill them, but there on the bottom. I know 72's are mounted on top. This inner fender that I used is from a 70 Gmc. I also would like to know the correct hardware screws for the valve? Pics would be a plus. Thanks!

Andy4639 · 10-24-2012, 12:23 AM

Sorry but I just don't understand. U want correct placement and hardware for the hot water valve on the inner fender but it's a 70 model inner fender on a 72. Correct?

Luis_gz06 · 10-24-2012, 04:53 PM

Quote:

Originally Posted by Andy4639

Sorry but I just don't understand. U want correct placement and hardware for the hot water valve on the inner fender but it's a 70 model inner fender on a 72. Correct?

Correct, yes!! Sorry for the confusion.

Luis_gz06 · 10-26-2012, 08:05 AM

Thanks alot for the diagram. But It still doesn't show the hardware. Would be better if someone post a pic of their 72 truck with their valve installed correctly.

**Stocker** · 10-26-2012, 11:40 AM

No pics, but the mounting bracket screws are 8" from the fender (vertical sheet metal), and centered on the inner fender -- that is, at its highest point front-to-rear.

Luis_gz06 · 10-27-2012, 01:25 AM

Were the screws philips head or nut head?

**Stocker** · 10-27-2012, 01:36 AM

Hex head -- black, kinda tall (maybe 1/8" or so). I'll get better measurements in the morning.

Andy4639 · 10-27-2012, 01:59 AM

Quote:

Originally Posted by Luis_gz06

Thanks alot for the diagram. But It still doesn't show the hardware. Would be better if someone post a pic of their 72 truck with their valve installed correctly.

Why not just put on the fender and be done with it. It's OK to do this. U have a 70 fender in 72 truck so it's not like your going for 100% correctness. Are u?

Luis_gz06 · 10-27-2012, 07:32 AM

It's not the fender im worried about. Just where to drill the holes to mount the valve correctly, thats all. I have a 70 and a 72, and the 70 has the valve mounted on the bottom. Thanks alot for your guy's help, and sorry for all this misunderstanding.

**FirstOwner69** · 10-27-2012, 11:47 AM

Try this link to a recent thread. Click on the small picture in post #7 to enlarge. This thread was for a big block truck, but I think the mounting is the same for all.

http://67-72chevytrucks.com/vboard/s...d.php?t=513578

**Stocker** · 10-27-2012, 02:29 PM

Quote:

Originally Posted by Stocker

Hex head -- black, kinda tall (maybe 1/8" or so). I'll get better measurements in the morning.

The bolt head looks similar to the one in this pic...

... but has a small 'shoulder' and no washer. The hex head is 3/16" tall and fits a 3/8" socket. The sheet-metal threads are 1/4" x 12 (12 threads per inch) and are 5/8" long including about 1/8" of taper to a point on the end. Hope this helps.

Luis_gz06 · 10-28-2012, 08:22 PM

So the bolt is aorund 8 inches long and 1/8 in size?

**Stocker** · 10-28-2012, 09:22 PM

What? No, I wrote 5/8" long, not 8" long.

And the threads are 1/4-12, which means the shaft starts as 1/4" diameter (before threads are formed), and has 12 threads per inch.

The last 1/8" of it tapers to a point, like this:

Edit: Just found a picture -- the screws look like this

and are black as I posted earlier. They are 5/8" long and have 1/4-12 thread.

Luis_gz06 · 10-31-2012, 07:23 PM

Thanks so much for your guy's help.

10-23-2012, 09:54 PM	#1
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	A/C heater shut off valve?? Anyone know how the heater shut off valve is mounted correctly on a 72 inner fender? I replaced my rusty inner fender years ago, and replaced it with a non a/c truck inner fender. So theres no drilled holes for it. I see that theres pre dimpled dots to drill them, but there on the bottom. I know 72's are mounted on top. This inner fender that I used is from a 70 Gmc. I also would like to know the correct hardware screws for the valve? Pics would be a plus. Thanks! __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

10-24-2012, 12:23 AM	#2
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: A/C heater shut off valve?? Sorry but I just don't understand. U want correct placement and hardware for the hot water valve on the inner fender but it's a 70 model inner fender on a 72. Correct? __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

10-26-2012, 08:05 AM	#4
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: A/C heater shut off valve?? Thanks alot for the diagram. But It still doesn't show the hardware. Would be better if someone post a pic of their 72 truck with their valve installed correctly. __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

10-26-2012, 11:40 AM	#5
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,595	Re: A/C heater shut off valve?? No pics, but the mounting bracket screws are 8" from the fender (vertical sheet metal), and centered on the inner fender -- that is, at its highest point front-to-rear. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

10-27-2012, 01:25 AM	#6
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: A/C heater shut off valve?? Were the screws philips head or nut head? __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

10-27-2012, 01:36 AM	#7
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,595	Re: A/C heater shut off valve?? Hex head -- black, kinda tall (maybe 1/8" or so). I'll get better measurements in the morning. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

10-27-2012, 07:32 AM	#9
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: A/C heater shut off valve?? It's not the fender im worried about. Just where to drill the holes to mount the valve correctly, thats all. I have a 70 and a 72, and the 70 has the valve mounted on the bottom. Thanks alot for your guy's help, and sorry for all this misunderstanding. __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

10-27-2012, 11:47 AM	#10
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,844	Re: A/C heater shut off valve?? Try this link to a recent thread. Click on the small picture in post #7 to enlarge. This thread was for a big block truck, but I think the mounting is the same for all. http://67-72chevytrucks.com/vboard/s...d.php?t=513578

10-28-2012, 08:22 PM	#12
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: A/C heater shut off valve?? So the bolt is aorund 8 inches long and 1/8 in size? __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

10-28-2012, 09:22 PM	#13
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,595	Re: A/C heater shut off valve?? What? No, I wrote 5/8" long, not 8" long. And the threads are 1/4-12, which means the shaft starts as 1/4" diameter (before threads are formed), and has 12 threads per inch. The last 1/8" of it tapers to a point, like this: Edit: Just found a picture -- the screws look like this and are black as I posted earlier. They are 5/8" long and have 1/4-12 thread. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 10-28-2012 at 09:39 PM.

10-31-2012, 07:23 PM	#14
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: A/C heater shut off valve?? Thanks so much for your guy's help. __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)



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