I've posted this info several times over the years and thought it would be helpful to post it separately and link to it from our Help Page.

NOTE: The 235-75R15 is often used when running radials on 1963 and 1964 Cadillacs.  It will be about 1" shorter than the factory 8.2 x 15 tires and will effectively drop the ride height about 1/2".

If your car does not seem to be sitting at the right height due to tired coil springs, etc.,  you can check the suspension standing height per shop manual in the Chassis Suspension Chapter 4.

For the front (1963 &1964 Shop Manual page 4-15, Fig 4-21), measure from front rear lower control arm flange up to the center of the hole in the frame as seen in the shop manual illustration. Correct Standing Height Ranges are listed by body style on page 4-32 in ship manual and seen at top.

For the rear (1963 & 1964 Shop Manual page 4-15 Fig 4-22), measure distance from top of rear axle housing straight up to lower underside surface of the frame. . Correct Standing Height Ranges are listed by body style on page 4-32 in ship manual and seen at top.

A coil spring with over a thousand pounds on it for 50 year is going to compress. Metal becomes fatigued and even thought these are stout coil springs they will compress.

Also, keep in mind that there were many variations on the springs depending on whether or body style and if you had regular or HD springs.  For 1964 you had 7 different springs (4 regular and 3 HD, and 5 on the rear (3 regular and 2 HD) and 2 variations of leaf springs on the commercial chassis leaf springs. 

NOTE: Comparing the height of uninstalled springs, especially New HD springs and old regular springs is basically Meaningless!  You can take a new HD spring and sit next to a comparable regular spring, both on level ground and uncompressed, and the HD spring  will sit or so lower than the tired old regular spring but when you go to install in the car will force the car up to the proper height. When I first ordered my CDV HD springs from Kanter I thought I had royally messed up when I compared the two, but once I installed the spring I was greatly relieved.

For reference the springs are listed on page 4-32 and 4-33 in the 1964 Cadillac Shop manual.

Here are scans from those pages:


Here is a picture showing the Front Standing Height on my 1964 Coupe DeVille at almost Exactly 8", just under the 8 1/4" upper limit: 

Views: 1388

Reply to This

Replies to This Discussion

Now included on our help page - www.help.6364cadillac.com

Bumping this up since there is a lot of coil spring discussion on the forum. There were 7 front and 7 rear coil springs used originally depending on body style and regular or HD spring used. This is on the Help Page under:

- Suspension Standing Height and Coil Spring Specs

RSS

Photos

  • Add Photos
  • View All

Forum

Current 1963/64 Cadillac Listings on eBay

Started by Jason Edge in For Sale. Last reply by Jason Edge 21 hours ago. 1 Reply

To see all 1963/64 Cadillacs Listed on eBay in the USA…Continue

Tags: ebay

A word of caution about using Stock Interiors/Auto Custom Carpets

Started by Chris Gill in Restoration Discussion. Last reply by Chris Gill on Wednesday. 4 Replies

Hi Folks, Just a word of warning here. Take it or leave it... I purchased almost $1,000 worth of carpets, custom mats, and bulk carpet from Stock Interiors over the past year for my 1963…Continue

AC Trouble shooting Help?

Started by William Mott in 1963/64 Cadillac Specific Discussion. Last reply by Kurt on Wednesday. 12 Replies

Good Evening all,I just got the 63 caddy back on the road: cleaned up the tank, new sending unit, new Edelbrock electric fuel pump, and Edelbrock relief valve.  Still had some vapor lock, but…Continue

Tags: AC

Let's Pop the Cork!

Started by Jason Edge in 1963/64 Cadillac Specific Discussion. Last reply by Tony and Ginny 429 on Wednesday. 10 Replies

I have been intermittently working on parts Car #55, a 1963 Series 62 Four Window Sedan, between work on my new house addition project (ready to start floor framing once foundation and drainage is…Continue

Blog Posts

I was working on my HVAC system this winter and during the process of taking the dash pad off these two parts fell out. Does anyone know what they are and where they go?

Posted by Patrick Westphal on April 12, 2022 at 1:35pm 1 Comment

I was working on my HVAC system this winter and during the process of taking the dash pad off these two parts fell out. Does anyone know what they are and where they go?

Continue

1964 Cadillac Coupe DeVille Convertible Speedometer Bulbs

Posted by Russell L Parr on April 1, 2022 at 9:15pm 6 Comments

I need to replace the bulbs for the speedometer cluster in my instrument panel..

Before I open up the dash, I want to have the necessary bulbs on hand.

Can someone help me determine what bulbs I need, the number of bulbs I need,  and where to purchase them?

Your help will be greatly appreciated.

1964 Cadillac Coupe DeVille Convertible Speedometer Bulbs

Posted by Russell L Parr on April 1, 2022 at 9:15pm 0 Comments

I need to replace the bulbs for the speedometer cluster in my instrument panel..

Before I open up the dash, I want to have the necessary bulbs on hand.

Can someone help me determine what bulbs I need, the number of bulbs I need,  and where to purchase them?

Your help will be greatly appreciated.

Temperature gauge not working properly

Posted by SK on March 23, 2022 at 2:43pm 2 Comments

The temperature gauge of my 63 Eldorado does not work properly.

It goes slowly all the way up and stays there, while the true temperature is around 155-160 F (water in the radiator and/or the top of the thermostat housing).

Where should I start to solve the problem? The gauge itself, the temperature sensor, or the wiring? Or something else? The sensor is a new (aftermarket part)…

Continue

Videos

  • Add Videos
  • View All

© 2022   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service