Tiny coolant line

[ThriftyT]

Can anyone tell me what this is for? 

Dont think I’ve ever seen one on another vehicle before

 

thanks 

[Rosco]

I’m far from an expert, but I’ve never seen anything like this either.  It looks like a by-pass line or an overflow line of some kind.  What year and make of vehicle is this on?  Hopefully, someone with more expertise will be able to shed some light on this for you.  I’ll be following your posts,  because I’d like to know what it’s for too!  

[ThriftyT]

1940 Chrysler Windsor.   I’m guessing some kind of pressure bleed.  

[greg g]

Was a pressure less system.

 

It is bypassing the bypass. Is it feeding the heater return or enhancing the return flow.

Edited August 7, 2019 by greg g

[soth122003]

Greg g called it. These cars were a zero pressure system for cooling. That being said, I have never seen this on these old Mopars. Looking at the thermostat housing it seems like this a housing for a different engine. That port looks manufactured on the housing. May be some ones gee whiz thing they saw on something else. But that line is redundant to the bypass part of the housing.

 

Joe Lee

[ThriftyT]

So it’s not needed?

 

[soth122003]

Doesn't seem to be. But if you remove it you'll have to plug both ports or get a new housing and water pump elbow. But you know what they say, "If it ain't broke, don't fix it.

 

Joe Lee

[chrysler1941]

20 hours ago, soth122003 said:

Greg g called it. These cars were a zero pressure system for cooling. That being said, I have never seen this on these old Mopars. Looking at the thermostat housing it seems like this a housing for a different engine. That port looks manufactured on the housing. May be some ones gee whiz thing they saw on something else. But that line is redundant to the bypass part of the housing.

 

Joe Lee

Thermostat housing is a pre-war model and looks exactly like my 41, minus the nipple

Edited August 8, 2019 by chrysler1941

[chrysler1941]

19 hours ago, ThriftyT said:

So it’s not needed?

 

Needed for faster defroster heat.

[Dan Hiebert]

That seems to explain the same round flat spot on the thermostat housing of our D24, that is not drilled and tapped.  Apparently for some ulterior motive, but it seems kind of pointless.  The better question may be what heater set-up your car has, or had?  Was this something for a severe winter market to provide that faster heat for the defroster?  Multiple heaters in the cabin that need a tad more flow, or a better air bleed?  I've never seen that set-up, either, and now I'm anxious to know not so much what it's for, but how it is supposed to work/improve something. 

[Frank Elder]

10 hours ago, chrysler1941 said:

Thermostat housing is a pre-war model and looks exactly like my 41, minus the nipple

My 47 has the same bypass housing as yours and it is not pre war.........and the engine is the same one that came with the car when built.

[ThriftyT]

So my 40 does have “dual climate control”.   (2 heaters in the cab).  So I suppose I better leave it.  

[chrysler1941]

8 hours ago, Frank Elder said:

My 47 has the same bypass housing as yours and it is not pre war.........and the engine is the same one that came with the car when built.

Never implied only used on pre-war. Just answering soth122003 about design of housing. Later models had more vertical outlet. 

[chrysler1941]

7 hours ago, ThriftyT said:

So my 40 does have “dual climate control”.   (2 heaters in the cab).  So I suppose I better leave it.  

Like this? If's water tight, I'd leave it.

[Frank Elder]

2 hours ago, chrysler1941 said:

Never implied only used on pre-war. Just answering soth122003 about design of housing. Later models had more vertical outlet. 

I did not imply that you implied that you said it was pre war only, it was only a simple observation that mine is similar to yours but of a different era. Now what are the implications of that....lol.

EDIT. I wonder if it has a military connection, the power wagons and M-37s have different equipment on these engines than their civilian counterparts.

Edited August 9, 2019 by Frank Elder

[Plymouthy Adams]

looked in my official US Army TM 10-1442 Dated Feb. 15, 1942, Group 5, cooling, no pictured small tube, no mention of small tube in parts list.  There was only one distinction in the by-pass elbow...Ambulance and non-ambulance...yet the hose is the same for all....

 

manual covers WC21,23,24,25,26,27 and 41  the official was a major general by the name of ADAMS.....got mothing more to say...my dog is now asleep, don't wake him.....lol

Edited August 9, 2019 by Plymouthy Adams

[chrysler1941]

It rather interesting for I have always wondered about the round raised area. Could it be and even earlier option ? Where they too lazy to change castings?

e mold ?

Edited August 9, 2019 by chrysler1941

[Plymouthy Adams]

11 minutes ago, chrysler1941 said:

It rather interesting for I have always wondered about the round raised area. Could it be and even earlier option ? Where they too lazy to change castings?

e mold ?

 

 

simple answer here......over the years the changing temperature has cause a molecular shift and thus the resultant sagging......did not say it was a good answer, or right answer, just a simple answer.....

[chrysler1941]

1 minute ago, Plymouthy Adams said:

 

 

simple answer here......over the years the changing temperature has cause a molecular shift and thus the resultant sagging......did not say it was a good answer, or right answer, just a simple answer.....

? Climate change ?

[Plymouthy Adams]

let me run my flag of qualification up the pole.....

 

[Frank Elder]

All levity aside you must remember that Chrysler was famous for hoarding older parts and then upon running out of the "correct" part they would use the old parts until the new shipment of correct part arrived on the line.

[chrysler1941]

Ok I think i found it in this heater package. What do you think?

Part lists over 10 different heater packages

 

[Plymouthy Adams]

that would rule out the military application except for the General's staff car...….

[ThriftyT]

5 hours ago, chrysler1941 said:

Like this? If's water tight, I'd leave it.

Yup.   Pretty darn similar to that.     See I don’t like clutter and unneeded things, so I was going to remove it.   But I guess I better leave it.  Darn.  

[greg g]

So is the fitting on the water pump the heater return or the heater supply??  Can't wrap my head around the path! 3specially with the tstat closed, unless it doesn't completely seal