Jump to content

Mystery hole on cowl on 48 DeSoto


MarcDeSoto
 Share

Recommended Posts

If you look at my 48 DeSoto cowl you can see three holes on the left.  I think I know that the holes on top of each other are for the hot water and return water for the heater.  But does anyone know what the hole on the left is for?  

 

 

P1030026.JPG

Link to comment
Share on other sites

The coil on my 1940 dodge mounts through the firewall in that location. It could be a pass-through for the ignition switch wire going to the coil. Does your ignition switch have a armored jacket protecting the hot wire to the coil?

Link to comment
Share on other sites

Yes you guys are right.  I was wrong thinking the two holes on top of each other were for the heater.  But the one on top must be the hot water hose and the one on the far left must be the heater return hose.  So I'm thinking the heater valve at the back of the block must be the hot water supply, and the heater return hose must go to the water pump.  

Link to comment
Share on other sites

Yes, the heater valve on the back of the head is the hot water supply to the heater. And the heater fitting on the water pump is the return. If you look at the design of the water pump you can see that the heater fitting is on the suction side pulling coolant into the pump.

Link to comment
Share on other sites

The two upper are for the heater but the lower one seems to  be a vent for water that comes through the air vent or something. It’s a hose that is just left open at the end

 

A03FEC74-CE7F-4E56-8F81-C118A748D128.jpeg.0ab2cd808434225fca55f5116464a6bc.jpegD8CC6151-7B05-492C-A333-48C0D82C03D7.jpeg.06386bbfba8cc7b344ea49f2ec20adae.jpeg

Link to comment
Share on other sites

It looks like your heater hoses are reversed.  The hot water supply is coming from the water pump, and the return hoses are going to the hot water outlet at the back of the head.  Unless the hot water hoses go to the lower hole and the return water comes from the higher hole?  But maybe I'm missing something?  

Link to comment
Share on other sites

12 hours ago, MarcDeSoto said:

It looks like your heater hoses are reversed.  The hot water supply is coming from the water pump, and the return hoses are going to the hot water outlet at the back of the head.  Unless the hot water hoses go to the lower hole and the return water comes from the higher hole?  But maybe I'm missing something?  


 

You are so right! Another surprise gift from my PO! As I go through, I find little things that are wrongly installed or just not quite right that once reconciled make a whole of sense . 
 

for example, I realized the oil bath support rod was mounted to the left spark plug cabling organiser instead of the right side . 
  Why does that matter, you may ask? Well, i always struggled with the oil bath being slightly pushed at an angle due to the way it was being secured. More important though is the oil bath holder also holds the throttle return spring attached to a little hook that now very neatly over the cabling holder instead of stretching it out as before causing a weak spring .

 

 

thank you @MarcDeSotothis probably explains why I get heat emanating from my heaters after the car is running for a while regardless of heater setting!

Edited by wagoneer
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Terms of Use