Author Topic: 1959 Cadillac heater core and valve  (Read 3978 times)

INTMD8

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1959 Cadillac heater core and valve
« on: December 15, 2017, 05:42:56 PM »
I've put off this job for years but finally getting around to it. 

Pulled everything apart (easier than I thought) and the core itself is leaking.

Does anyone re-core/repair these or am I better off buying new?

Assuming I should replace the control valve while I am in there as well.

Also need the inner/outer firewall gaskets and rubber boot between blower housing and firewall box.

Recommended source for these items? It's all on ebay of course but want to make sure I'm not overlooking a better option.

Thanks!


Offline 76eldo

  • Posts: 6651
  • CLC Number: 22443
  • Name: Brian Rachlin
Re: 1959 Cadillac heater core and valve
« Reply #1 on: December 15, 2017, 06:21:12 PM »
Wow that's one nasty looking core.
Probably can get one new.
I had a valve rebuilt but it took months so I'm not recommending that person.
Do the valve while it's all apart.
I need to do the one on my 60 too. It leaked and I bypassed it.
Need to do one on my 70 also.

Brian
Brian Rachlin
Huntingdon Valley, Pa
CLC # 22443
I prefer email's not PM's rachlin@comcast.net

1960 62 Series Conv with Factory Tri Power
1970 DeVille Conv
1970 Eldo
1970 Caribu (?) "The Cadmino"
1973 Eldorado Conv Pace Car
1976 Eldorado Conv
1980 Eldorado H & E Conv
1993 Allante with Hardtop (X2)
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2012 CTS Coupe
2017 XT
1956 Thunderbird
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Offline Bobby B

  • Posts: 2732
  • Mendham, New Jersey
  • Name: Bob Bender
Re: 1959 Cadillac heater core and valve
« Reply #2 on: December 15, 2017, 08:36:40 PM »

Does anyone re-core/repair these or am I better off buying new?
Thanks!


I wouldn't even think of repairing that core if a new one was available. I think your radiator shop would be telling you the same thing.
                                                                                             Bobby
1947 Cadillac Series 62 Convertible Coupe
1968 Mustang Convertible
1973 Mustang Convertible
1969 Jaguar E-Type Roadster
1971 Datsun 240Z
1979 H-D FLH

Offline 59-in-pieces

  • Posts: 1472
  • CLC Number: 17326
  • Name: S. Butcher
Re: 1959 Cadillac heater core and valve
« Reply #3 on: December 16, 2017, 12:32:17 PM »
Jim,
I assume this is the first time the core has been out since you owned it.
However, do you know if it had been repaired before.
The reason I ask is that based on my experience with 59's, the sensor coil is wound way too tight.
What I have observed is the the coils are at least 1/2" apart from each other - sometimes further, but never that tight.
Better sampling that way - though I can't be sure, for sure.
Have fun,
Steve B.
S. Butcher

Offline 59-in-pieces

  • Posts: 1472
  • CLC Number: 17326
  • Name: S. Butcher
Re: 1959 Cadillac heater core and valve
« Reply #4 on: December 16, 2017, 12:40:14 PM »
Jim,
A repro boot - 4 sale section.
Check it out.
Have fun,
Steve B.
S. Butcher

INTMD8

  • Guest
Re: 1959 Cadillac heater core and valve
« Reply #5 on: December 16, 2017, 05:00:45 PM »
Doesn't seem like it's ever been apart but it's so old it's hard to say.

Thanks for the info guys :)

Offline Daddio

  • Posts: 88
  • Name: Mike Atkins
Re: 1959 Cadillac heater core and valve
« Reply #6 on: December 17, 2017, 09:03:21 AM »
I had my heater recored by a local rad shop a year or so ago. They pressure tested it and the control valve was fine so I reused it.  However, your core is in much worse shape than mine and may not be rebuildable.
For the gasket, I used adhesive backed home door/window weatherstripping. It was 1" x 1/2", black in colour and I trimmed it to fit. Be sure to reuse the standoffs to prevent crushing it when reinstalling.
I made my own boot (15 years ago) out of rubber gasket material using the original as a pattern. It looks better than the hard plastic repops, but the moulded one (now available here) looks very nice.
Mike

1956 Thunderbird
SOLD - 1959 Eldorado Biarritz

Offline David Greenburg

  • CLC #3830
  • Posts: 1997
  • CLC Number: 3830
  • Name: David Greenburg
Re: 1959 Cadillac heater core and valve
« Reply #7 on: December 17, 2017, 05:48:41 PM »
I believe Old Air Products has the gaskets.
David Greenburg
'60 Eldorado Seville
'61 Fleetwood Sixty Special

Offline Jeff Wilk

  • J. Wilk CLC # 25630
  • Posts: 1324
  • The Past + The Future = My Heaven on Earth
  • Name: Jeff Wilk
Re: 1959 Cadillac heater core and valve
« Reply #8 on: December 17, 2017, 07:25:02 PM »
These guys are awesome. They did my 1959 and others as well which looked the same.

http://www.caparadiator.net/

Jeff

 
"Impossible Only Describes The Degree Of Difficulty" 

Southern New Jersey

1959 Cadillac Fleetwood Sixty Special
1975 Eldorado Convertible (#12 made)
1976 Cadillac Mirage (factory authorized Pick-Up)
1933 Phaeton Chevrolet - "Baby Cadillac"
1933 Master Sedan Chevrolet - "Baby Cadillac"

SOLD
1958 Cadillac Sixty-Special
1958 Cadillac Sixty-Special
1958 Cadillac Sedan
1958 Cadillac Coupe Deville

Offline 55 CDV Fan 82

  • Posts: 1128
  • CLC Number: 30850
  • Name: Tim Neumann
Re: 1959 Cadillac heater core and valve
« Reply #9 on: December 18, 2017, 09:31:55 AM »

I second Jeff's comment.  Cap-A-Radiator are a great group of guys.  They built a brand new radiator for my 1954 Buick when I still had it and it was a work of art.  I believe they charge 200 for a heater core rebuild.
Tim

CLC Member #30850

1955 Cadillac Coupe Deville "Evelyn"
1967 Buick Wildcat Convertible "Joyce"

Past Cars

1937 LaSalle Opera Coupe "Adeline"
1940 Chevrolet Coupe "Scarlett"
1941 Ford 11Y truck
1954 Buick Special 48D
1955 Packard Clipper Super Panama
1957 Cadillac Series 62 Coupe
1962 VW Bug
1962 Dodge 880
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1968 Plymouth Barracuda
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INTMD8

  • Guest
Re: 1959 Cadillac heater core and valve
« Reply #10 on: December 18, 2017, 10:28:01 AM »
Thanks guys but I already sent the valve for a rebuild to Joe Hudacek. He is supplying me with a heater core as well.

Offline Bobby B

  • Posts: 2732
  • Mendham, New Jersey
  • Name: Bob Bender
Re: 1959 Cadillac heater core and valve
« Reply #11 on: December 20, 2017, 08:54:22 PM »
Thanks guys but I already sent the valve for a rebuild to Joe Hudacek. He is supplying me with a heater core as well.

He did an excellent job on the '47. Joe is Good People   ;).......
                                                               Bobby.
1947 Cadillac Series 62 Convertible Coupe
1968 Mustang Convertible
1973 Mustang Convertible
1969 Jaguar E-Type Roadster
1971 Datsun 240Z
1979 H-D FLH

INTMD8

  • Guest
Re: 1959 Cadillac heater core and valve
« Reply #12 on: December 27, 2017, 04:49:01 PM »
Good to hear^  :)

A few more questions if you guys don't mind.

When I move the lever over to defrost the flapper door inside the case only opens about halfway to the defrost hose outlets.

Normal or should I adjust the external linkage to open it more?

Also, what is the air door above the heater core for? Seems to cycle open and close through the range of defrost lever operation but I can't really tell what it's supposed to do.

Thanks :)

This is how far the flap for defrost opens, mid position-



And this is the air door above the heater core I do not know the function of-


Offline Scott Halver

  • CLC #24920
  • Posts: 133
  • 1960 Eldorado Seville - Sienna Rose
  • Name: Scott Halver
Re: 1959 Cadillac heater core and valve
« Reply #13 on: December 28, 2017, 11:41:45 AM »
Jim,
I went through my 1960 heater core/box/duct work/vacuum pods and lines about 2 years ago ......  had the whole dash out.   If I remember right, the defrost door should fully close so that 98% of the air is being blown up on the windshield.   I would check first to see if the door has that much travel, then when re-installing the box and Bowden cables (should be top leaver, above heater leaver) I would adjust the defrost cable so that it can fully open and close the door ......   working off memory.   I think the rest of the doors work off vacuum from the pods.   For what it's worth, I used all of my old Bowden cables and then a year later bought new replacement cables from Caddy Daddy-   replaced the ac Bowden cable because it was just too hard to move.  I think the ac cable got pinched somewhere and was really hard to move, afraid I was going to break the ac controls in the car trying to move the Bowden cables.   

Note:  The box leavers and tabs are easy to bend.   I had to play with the doors for awhile to figure out what was keeping one of the doors from fully closing.   Once I figured it out and slightly re-bent the actuating leaver, it worked like a charm.   We had the car in St Paul last June and it was 49 degrees and raining.   Being from Arizona I had not tried the defrost ..........   was praying it would work and it did !!    I obtained a re-built heater core and valve from Joe H and it has worked perfectly.

SHalver CLC #24920
1960 Eldorado Seville, Grandfather Bought New
1970 Corvette Convertible 350/350

Offline 59-in-pieces

  • Posts: 1472
  • CLC Number: 17326
  • Name: S. Butcher
Re: 1959 Cadillac heater core and valve
« Reply #14 on: December 28, 2017, 12:43:34 PM »
Jim,
This diagram may help.

Another couple of thoughts.
The plastic vacuum valves (gray) at the back of the control modules, should be "slightly" = tiny amount of the lightest weight oil - clock oil, to maintain the vacuum seal and make their operation smoother.
The jams where the doors close against, have felt gaskets.
They should be replaced (a task) as they mat down and harden up over time & use, which allows air to pass even if the doors are closed = draft in the cabin.
Belt and suspenders, perhaps.
Have fun,
Steve B.

P.S.
Sorry for the quality of the diagram, it took 5 attempts to post, had to dumb the pic down - original too sharp a pic to post
« Last Edit: December 28, 2017, 01:12:28 PM by 59-in-pieces »
S. Butcher

INTMD8

  • Guest
Re: 1959 Cadillac heater core and valve
« Reply #15 on: December 28, 2017, 07:23:31 PM »
Thanks guys! The flap that directs air to the defrost outlets has enough travel to go to the floor of the box (which would divert almost all air to defrost), just doesn't get that far.

I can adjust the linkage so this happens no problem, just doesn't appear to have ever been adjusted so I wasn't sure if it was supposed to go that far.

The bowden cables for the box all move freely. Only one stuck is for the passenger kick panel vent.

Thanks for the photo, I think I have the same in the workshop manual but was having a hard time with it as mine is a non-ac car.

Still, the valve -above- the core is a mystery to me. Appears to just be a dead end dead space that is blocked off by the gasket when bolted up to the firewall. 

Maybe I'll take a video of it tomorrow, how it moves with the external linkages.

Thanks again!

INTMD8

  • Guest
Re: 1959 Cadillac heater core and valve
« Reply #16 on: December 30, 2017, 06:07:22 PM »
Remembering that the inside box gets installed with spacers as well as a gasket, best I can tell the small air door above the core is supposed to (at times) direct outside air to the defrost outlets. Has a little scoop at the top to direct air from the outside heater box.

Why? I don't know, can't come up with any other explanation.

Still don't even have a real understanding of how all this works so I'm just setting the cables to their original points.

Little cable connecting the external box linkage to one part of the heater control valve, another cable to the actual valve part, coil that goes in front of the box and a vacuum actuated air door to let air in.

Seems much more complicated than even many 70's cars I have worked on.




INTMD8

  • Guest
Re: 1959 Cadillac heater core and valve
« Reply #17 on: January 03, 2018, 08:29:58 PM »
Happy to report that it's all back together and everything works perfectly.

Thanks again for the help guys.

 

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