| |
Click on image for the lowdown. 
====
| | |
7 members (DuckRancher, 55shaker, TexasA&M48Truck, 1955 1 Series, sron48, Doug Boudreaux, 1 invisible),
77
guests, and
3
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,200 Posts1,057,405 Members48,471 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jun 2012 Posts: 13 New Guy | | New Guy Joined: Jun 2012 Posts: 13 | I reconditioned an old Harrison heater and am installing it in my 1950 Chevy 3100. Do I need a temperature control valve of some sort, or do I connect the two water lines directly to the engine? Also, can anyone explain which line goes to which plug on the engine?
Ed Burgess
"It's all good!"
| | | | | Joined: Aug 2012 Posts: 1,214 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 1,214 | I have an old Arvin recirculating heater in my 49 3100. It's orginal and is your basic inexpensive heater option for the 3100 back in the day. I have to manually open the heater valve just below the thermostat housing in cold weather for heat and manually close it during warm weather as I don't want hot coolant circulating through the heater when heat is not wanted. You should be able to make out the connections in the pic. 49 216 recirc heater connection The smaller hose running along with the two heater hoses is the radiator overflow line. | | | | | Joined: Apr 2009 Posts: 554 'Bolter | | 'Bolter Joined: Apr 2009 Posts: 554 | It sounds like you have the recirculating type of heater. You can screw an on-off valve into the engine outlet. May be possible to somewhat regulate the heat by opening it like a garden valve but that would involve stopping and adjusting it underhood. I added the valve shown in the linked picture with a cable to adjust flow or shut it off. I don't think it matters which hose goes to which fitting. The water just makes a loop. http://i99.photobucket.com/albums/l286/Hookalatch/Heater/IMG_1752.jpg | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | If you don't have a valve it doesn't make a difference. If you do have a valve you want the hose from the thermostat housing to the valve and the return to the water pump. | | | | | Joined: Mar 2010 Posts: 10,310 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,310 | If you aren't worried about being a purist, you could put in a pull cable operated shut-off valve. This can be used in place of the Ranco valve, but without the leaking problem, and you will be able to completely shut off the water to the heater core in the summer from inside the cab. The Ranco valve in the wide open position still significantly restricts the flow of water to the heater core, so you will want to duplicate this somehow.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Mar 2008 Posts: 3,750 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 3,750 | If you aren't worried about being a purist, you could put in a pull cable operated shut-off valve. This can be used in place of the Ranco valve, but without the leaking problem, and you will be able to completely shut off the water to the heater core in the summer from inside the cab. The Ranco valve in the wide open position still significantly restricts the flow of water to the heater core, so you will want to duplicate this somehow.
Carl Exactly what I did,I got one from a 400 series Rover in the junkyard,it's now controlled by the unused choke cable,so no additional dashboard clutter either.
1950 Chevy Advance Design 3100 in ScotlandIn the Stovebolt GalleryMore pix on Flickr. I've definately got this truck thing in my blood ... my DNA sequence has torque settings"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.
| | |
|
|
| |
