Rear Main Leak?
I am running Rotella T4 15-40 and it’s runs great-even in the winter.
Its always has a bit of an oil leak, but getting a little heavier. Do we think this could be the rear main seal leak?
As always, thanks for the help!
Replies to This Discussion
-
Permalink Reply by Logan Robb on
-
Permalink Reply by Russ Austin on
-
Have you checked on the oil sending unit? They like to leak at the top, or it could be valve covers leaking.
-
Permalink Reply by Dennis P. DiBari on
-
Hi Logan,
Russ is right. Check that nothing is leaking from the top and dripping down. The sender switch is in the rear as he said. Also, from the valve cover gaskets - that the return holes are clear under the valve covers. If not, it probably is the rear main seal (the Achilles Heel of the 429 CI). Good luck with it.
Dennis DiBari, Cottekill, NY
-
-
Thank you!
I had the car out and drove about 50 miles yesterday, the weather was GREAT! Woke this morning, it was SNOWING! Ug, winter isnt done with us yet it seems.
-
-
Logan,
Like you, I live in the north and don't even want tot hear the word "winter" again. Good luck with your Caddy!
Dennis DiBari, Cottekill, NY
Photos
Members
Forum
1964 Cadillac wagon by Victor Body Works
Started by john w. warner in For Sale. Last reply by Logan Robb 16 hours ago. 2 Replies 1 Like
Its on Hemmings.Needs work!Continue
1963 Cadillac Fleetwood 60 Special Eyebrow Molding
Started by Stephen Pechenik in Restoration Discussion. Last reply by Russ Austin on Wednesday. 6 Replies 0 Likes
I am readying my Fleetwood to be painted. I need to replace the driver's side left chrome eyebrow molding (below the headlights). It appears to be made from pot metal. Mine is broken and I need to…Continue
Tissue holder
Started by Phillip Hill in 1963/64 Cadillac Specific Discussion on Sunday. 0 Replies 0 Likes
Hi everyone I would like to know dose anybody here have a tissue holder fitted to their car if so could you please send me a picture of it thanks in advance Continue
CLC Membership Dues Go Up April 1st - Renew Now Thru March 31 & Lock in Current Rates!
Started by Jason Edge in 1963/64 Cadillac Specific Discussion Jan 17. 0 Replies 0 Likes
CLC Membership dues are going up April 1. Join or Renew between now and March 31 and save! You can even renew with current rates for up to 3 years!Here is a breakdown of the rate increases Effective…Continue
Blog Posts
1963 RHS A/C kick panel - photos needed
Posted by SK on June 2, 2025 at 2:20pm 2 Comments 0 Likes
Could someone post front and back photos of the 1963 right-hand kick panel with A/C?
My car didn’t come with the original kick panels, so it's a bit of a mystery to me how I should cut the backing board and carpet to fit around the A/C.
Many thanks,
-Samu
New old stock seat material
Posted by Ray Schick on August 22, 2024 at 6:25pm 2 Comments 0 Likes
I bought this seat material thinking that it’s…
Loud air moving sound within carb with cleaner removed
Posted by Dave Fehrle on March 23, 2024 at 3:23pm 8 Comments 1 Like
While checking my Carter carb with engine running, I took the air cleaner off and there was a very loud hissing sound of air. I placed a piece of paper over the carb and it didn’t move up or down, is this normal?
Events
-
February 15, 2026 - 63/64 Cadillac Chapter Zoom Meet-Up
February 15, 2026 from 7pm to 8:30pm – Zoom
0 Comments 0 Likes
© 2026 Created by Jason Edge.
Powered by
