I have been about to pull my hair out with my 64 rear main seal leaking. I have had it replaced twice and to no avail it still is dripping. I have had to engine rebuilt twice and I have to believe that all parts were replaced when rebuilt but not totatlly 100% sure. My mechanic says that it could be the thrust bearing could possibly be bad cause he did say there was more than usual movement in the crank that he was use to seeing...could he be possibly right about that? I just don't want to go to that expense unless I am sure it will resolve it. I no you can make no guarantees, but with your experience with these year models, you might have some inside info that I am not aware of...

Views: 35


You need to be a member of 63/64 Cadillac Website to add comments!

Join 63/64 Cadillac Website

Comment by Russ Austin on October 6, 2019 at 10:14am

A special tool is described in the shop manual. It guides the upper rear main seal into place so the sealing surface does not get shaved off. Don't use it, and a leak is about guaranteed, as you know. 

I don't see the crank moving back and forth as an issue, as the surface is the same. 

Comment by Kim K Kaiser on October 5, 2019 at 11:03pm

i can feel your pain, brother,!!!!  I'm in middle of replacing one now..

Comment by Tony and Ginny 429 on October 5, 2019 at 9:11pm


We just did a thread on the rear main seal leaking and Kim is in the process of putting the bottom of his engine black together after he replaced the rear main seal to see the results 

Many have different degrees of a problem with the rear seal leaking in our year cars 

It SB good reading just to learn more about the subject 

The info is on the current Dashboard page 



  • Add Photos
  • View All


Current 1963/64 Cadillac Listings on eBay

Started by Jason Edge in For Sale. Last reply by Jason Edge yesterday. 1 Reply

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

Tags: ebay

Bendix Power Brake Unit Power Section

Started by Mathis Richter in 1963/64 Cadillac Specific Discussion. Last reply by Chris Codd on Tuesday. 7 Replies

Hi,I have a huge problem my POWER SECTION of the ``Master-VAC Power Brake unit 9´´Diameter ´´ from Bendix is Broken and I can't open it to replace al the rubber parts did some of you have auch Power…Continue

Third brake light -help please.

Started by paul k in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge on Tuesday. 8 Replies

Did anybody from the club install third brake light in the rear window in his Cadillac? I have problem to figure out how to do it. Can I just run wire from break pedal switch and second wire connect…Continue

Blog Posts

1964 Cadillac Fleetwood sixty special / transmission dipstick needed

Posted by Pablo on September 20, 2020 at 9:57pm 1 Comment

How are you doing folks, I’m looking for a transmission dipstick, any info I will appreciated, thank you very much

1963 Cadillac hood driver side hinge

Posted by Steven on September 16, 2020 at 9:23am 1 Comment


 Does anyone know were I can buy a 1963 Cadillac hood driver side hinge or is there any other hinge that would fit? 



Bad Guage?

Posted by Karl Schwarz on August 26, 2020 at 3:08pm 6 Comments

So I am troubleshooting my fuel gauge issue. I bought a new sender and tested it. It  it goes from 1-ohm (empty) to 35-ohm (full). When I test it (outside the tank), when the float is in the up (full) position it only moves the gauge to about 1/2 full. When at the bottom (empty) position the gauge shows empty. This is the same issue I have when I fill and then use the gas in the tank - the gauge never reads ore than half full. Based on what I've read on this thread it would seem like the…



Posted by Fritz Seitz on August 11, 2020 at 2:35am 0 Comments

I have been working on a website-----www.fritzsautorepair.com-----

Does anyone have suggestions?


  • Add Videos
  • View All

© 2020   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service