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About harmony

  • Rank
    Senior Member, have way too much spare time on my hands

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  • My Project Cars
    1948 Chrysler Windsor


  • Location
    British Columbia
  • Interests
    driving my 48 chrysler

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  1. Btw, I forgot to mention that when I googled what I was looking for, I went to "images" and spotted the valve I needed and once I checked it out, I realized it was the same p/n as you recoomended (74685) So I took that image and p/n to my parts store. It was after I purchased it that I saw that it was also a 4 seasons product. So thanks for that suggestion and sorry I didn't mention it.
  2. Yes it is 5/8" both ends. That threaded fitting in my block is 1/2" so I just used my heat gun on a short length of 1/2" heater hose and worked it onto the 5/8" end.
  3. The p/n is 74685. Both O"Reilly and Summit Racing use the same p/n for it in the US and here in Western Canada, Lordco Auto Parts also uses the same p/n. On the box it was referred to as Heater Valve by 4 Seasons . It's made in Chine so time will tell on how long it lasts. The inner openings on the rotating valve don't line up exactly with the in and out 5/8" tubes. Looking in the end of it sort of looks like a partial eclipse of the moon. I determined that I could have ground away a bit of the inner valve part with a long shaft die grinding bit, so that I would have had more undisturbed water flow, but them I'd run the risk of not getting all the metal filings out of the valve. So I just left it alone.
  4. Problem solved 😁 I got to searching on line for a control valve that would work. I wasn't about to pay $600 US for a NOS one on Ebay. By the time it landed in my lap it would have cost me about $900 Canadian. But I did find one that fits a 73 International dump truck that was the right size and had the bracketry at 90 degrees at a fraction of the price. The only slight concern was that the lever attachment for the cable was on the front side and not the back side. I had to fiddle around with it a bit so it didn't interfer with my spark plug boot. Mine are quite long. Anyways it all worked out ok and it solved the problem. Once I got the old control valve off and in my hand, I turned it upside down and with the valve closed I filled in tube with water and it came out the other end. So it was not properly closing. I just went for a drive and I not only have nice cool air coming in from the cowl vent but I also have cool air coming in from my kick panel vents now. I'm a happy camper ! Thanks everyone for your interest and suggestions and advice.
  5. That's a good idea and I had intended to go that route. However the threads on my fitting coming out of the head didn't look very good and I didn't have a tap to clean them up. So I did what the previous custodian of my car did and slip a heater hose over it.
  6. It would seem that mine has been altered
  7. I keep telling myself that I need to get one of those. I have the service manual and the parts manual. I'm just old fashioned and hope one day I'll stumble across an original copy at a swap meet, if we ever get over this covid thing and swap meets start to get going again. Does anyone have any comments on the reproduction owners manuals? My service manual is a reproduction and it's almost impossible to see any detail in most of the images because they are so black. I don't mean to drift off topic but that was very helpful info about the All Weather Aircontrol system.
  8. Well I have been wondering why that fitting would be 1/2" coming off the fitting that screws into the head, when all the heater hoses and steel lines are 5/8" ???. Perhaps I should take that valve off again and have another look at it. I know that the lever on it is not at 90 degrees to the flow of direction, so to say. But I was assuming that was designed that way because of the angle that the control cable was approaching the lever. I had a look inside when I had it off and the valve appeared closed at the time. If it was at 90 degrees the cable wouldn't properly open or close it completely. In the image you can see I added a new spring to insure it completely closed. Behind the lever you can see an aluminium piece that is bolted to the valve and it's shape just doesn't look like anything factory and it's an odd shape. Like a back yard butcher put it on there without even squaring it off. However until now. I've gone with " if it ain't broke don't fix it". The heater funtions work fine in the winter so I've never given that arrangement too much thought until now. Out of the picture to the right end off that aluminium piece is where the locking clamp for the outer cable of the control cable is fastened. I don't see the OEM valve anywhere in the parts catalog, or any mention of it in the service manual. I've searched google for 251 engine pictures but I don't see the valve on any of the pictures.
  9. By the way, are these images taken from the factory owners manual?
  10. Actually according to my lazer temp reader I get the same temp at the kick panel vent with the weather door open or closed ( cowl vent open, heater off)
  11. I'm a little confused when reading the first image. Under "country driving" it says if you open the cowl vent and keep the weather door closed you get heat in car without turning on the heater. I'm curious how the the outside temperature would effect the heat provided inside the car during the fall and winter days?
  12. With that in mind, what's the point of the cowl vent in cars with dual heaters? Why would Chrysler want hot air circulating in the car during the hot weather?
  13. This image shows half of the wire screen that feeds one of the heaters. Looking up from under the dash with the vent interior door open. I even tried to stuff some clear poly vinyl up in there covering the screening. The same material used for rear window convertable top windows, only a little thinner ( 30 gage) It was a super difficult job using a long slot screw driver to spread it out so it covered all the screen. However I still get the same amount of heat from the kick panel vents. I can't really get up in there to seal it completely. You would need the hand the size of a 3 year old child to get in there. It might be possible to get at it from outside by removing the cowl vent door.
  14. Yes I've seen that shut off valve on several pictures of the 251 flathead. But I don't have that valve on mine. I have a fitting that threads into the head and it has a 1/2" barb fitting on the exposed side. From there I have a short 1/2" heater hose, and then that shut off flapper valve that's controlled by the Heat control knob. Then 5/8" heater hose goes strait up to the 5/8" brass tube that feeds both heaters.
  15. With the cowl vent open the air is coming in from outside the car through the cowl vent opening. I have model 55 heaters and it's called All- Weather Aircontrol. So it almost sounds like the air is supposed to come into the heater enclosure and as long as there is no engine coolant circulating in that part of the system, maybe if the heaters were turned on, the squirrel cage fan would force the outside air through the car by way of the kick panels and the heater opening perhaps ???
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