hey tony would excessive heat cause the fuel pump to stop pumping. i spoke to a guy at a local car show he told me to drive the car with the gas cap off he said i may have vapor lock. what temperature should the intake be when i test it?

Views: 114


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

Join 63/64 Cadillac Website

Comment by Dan on December 22, 2013 at 9:17am

The vapor lock I'm referring to has nothing to do with the tank vent. It can happen even if the gas tank cap is removed. If the fuel inside the fuel line gets hot enough to boil the fuel pump will stop pumping.

Comment by Jason Edge on December 22, 2013 at 8:18am

James and all. There were a couple threads going on this same subject posted by James and deleted the second one.  It is fine to break out and start new threads for discussion on different topics (and encouraged) however for a particular problem it is easier to follow on one thread.  We often like to refer back to these later on, and it is helpful not to have the feedback scattered among numerous threads. Simply reply to the main thread instead of starting a new topic.  We all want to see James resolve this issue but it was getting hard to follow. 

Comment by Jason Edge on December 19, 2013 at 9:10pm

Have you verified the fuel pump is not pumping? Just unhook the rubber feed line where it connects at the front of the metal line over on the right frame rail, and put it down in a jar of gas and crank over. You often have to divide and conquer to get to the root cause.

Comment by Russ Austin on December 19, 2013 at 8:33pm

In a way, yes. the heat can soften the rubber used on some fuel pumps, because deathanol ruins the rubber. 

I doubt you have vapor lock, as there is a very large vent in the front of the gas tank. Its worth a look. A large upside down question mark shaped tube is attached to the front of the tank.  Take it off and blow through it. It should be free flowing.  Attach with a new piece of tubing, as the old tubing is a cause of gas fumes and gas spillage.


  • Add Photos
  • View All


Rear trailing arm bushings- premature failure

Started by Doug Scarrow in 1963/64 Cadillac Specific Discussion. Last reply by Tony and Ginny 429 17 minutes ago. 96 Replies

    Last fall I replaced my rear yoke and trailing arm bushings . Now with 410 miles on them the large  rear trailing arm bushings are done . I contacted Rare Parts the maker and they were defensive…Continue

Classic Cadillac Parts For Sale - Misc Items

Started by Jason Edge in For Sale. Last reply by Jason Edge 9 hours ago. 171 Replies

I have posted a few Misc items over on my Classic Cadillac Parts Facebook page at…Continue

Tags: classic cadillac parts, classiccadillacparts

Current 1963/64 Cadillac Listings on eBay

Started by Jason Edge in For Sale. Last reply by Jason Edge 10 hours ago. 0 Replies

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

Tags: ebay

'63 convertible visor mount questions

Started by Karl Schwarz in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge 10 hours ago. 5 Replies

I've got a 1963 Series 62 convertible.Anyone know the size of the three screws used to mount the Striker Support to the trim above the windshield? The "Striker Support" appears to be the name of the…Continue

Blog Posts

Looking for 63 Convertible / Coupe rear side trim

Posted by Gene McIlroy on January 24, 2020 at 12:18pm 0 Comments

Want to find a good straight dent free rear side trim for my 1963 Convertible.  I have both sides but they do not match.  Wanting to get them to match.  I am attaching a photo of the two trim sided that I have really wanting the squared off trim if I can get it.  Let's see what you have,…


Road Trip

Posted by Ray Schick on January 21, 2020 at 9:00pm 7 Comments

Got a little cabin fever this morning,decided to take a road trip to Hickory Corners Michigan, The Gilmore Museum. It’s about 2 1/2 hours from my home . Place is awesome,I was really impressed.



1964 429 Aluminum Front Cover For Sale!

Posted by Jeff Kinzler on January 12, 2020 at 3:30pm 1 Comment

  • I wound up with an extra front cover for my '64 and offering it for sale.

Purchased from a knowledgable part supplier with thorough hands-on knowledge of 63-64 Cadillac engines, who checked the part before sending it to me. The oil pump driven gearSee S bore and the pressure relief piston bore are both .002 over and within the .005…


Looking for the Rochester Choke Tube ...

Posted by Mack on January 10, 2020 at 1:14am 3 Comments


Looking to buy the choke tube for my Rochester... anybody have one for Sale???


  • Add Videos
  • View All

© 2020   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service