LOGIN
  • Post to the EFV-8 Forum
  • Post Classified Ads
  • Shop the Online Store
User Login

Not Registered Yet? Click Here to Sign Up!



(Forgot your Password?)
Remember me on this computer

Not registered yet?
REGISTER NOW!

Back to Home Page Show Forum Rules

Early Ford V-8 Club Forum

FORUM RULES: Users agree to these Rules when using Forum.

The site administrator reserves the right to change the terms and conditions of the user agreement without prior notice to the user. It is the responsibility of the user to regularly review the terms of this agreement.

The user agrees to the following terms:

  1. All information that you provide to us for your membership is correct.
  2. You will not use your membership to spam, harrass, or exploit other members in any way.
  3. Vulgar, Abusive, Racist and Sexist Language will not be tolerated.
  4. Commercial-type sales postings will not be allowed.
  5. No mass posting or flooding of the boards is allowed.
  6. No Advertising of parts or cars; no Ebay or business/commercial ads (please use the "Classified" for ads Wanted or For Sale).
  7. VIEWING MULTIPLE TOPICS ON SCREEN: You can choose to see more than 10 Topics at a time ... Log In and choose "Preferences" from the top bar on the Forum page. Scroll down and Change the "Default Topics Returned" parameter to 25 or 50, and save the changes. Since this setting is stored in your browser 'cookies' (if enabled), it seems to use that stored value even if you are not logged in. So, if you use a PC that you haven't logged into the forum from, the setting still seem to remain at the default.
  8. EXTERNAL PHOTO LINKS ON FORUM: You can still use external photo links in your posts on the new forum. They follow the rules of any link in that they have to have the URL link qualified down to the full image file name (example: .jpg). The links will open in a new browser window, the same as an uploaded image attached to a post. Since an image attachment to any post does not display inline with the post, the results are the same. You can use multiple external links within a post. This link is from photos on a site from Don Clink's 'Deuce@75' albums:

    http://donclink.com/deuce_75_1/images/dscn2950.jpg

    Using links from photo sites such as Photobucket can help in "size" issue with uploaded attachment files. For best viewing in web browsers, photos should be around the 800x600 pixel range, and probably not more than 1024x768. Most cameras today store HUGE jpg image files, as the default settings are in the 7, 8, 10, and 12Mb image sizes. The image files that are then attached are very large, and the browser can't display the full image size without using the scroll bars. Use the re-sizing functions of your photo editing software to reduce the image to 800x600, which reduces the file sixe and the image load time in the browser. Don uses Google's free Picassa3 software, which is an excellent photo management product. All of the photo albums of the Deuce, Grand National, and Auburn that are links on the NORG site were built using Picassa's web creation functions. And it's free? (THANKS to Don Clink for the info!)
  9. HOW DO I SHOW MY EMAIL ADDRESS ALONG WITH MY USERNAME? You can LogIn on the Forum, and select PREFERENCES. On this page Members can add optional information such as their City,State, Country; Occupation; Hobbies: list a Homepage; list AOL Instant Messanger Handle; Signature; "Make Email Address viewable to others;" and even change the number of Default Topics shown on a page. WHEN others click on your profile, they will see this information.

EFV-8 Club Forum / General Mercury Discussion / 47 MERCURY FLATHEAD OVERHEATING

   Reply to this DiscussionReply to Discussion | Start new discussionNew Discussion << previous || next >> 
Posted By Discussion Topic: 47 MERCURY FLATHEAD OVERHEATING

Printer-friendly Version  send this discussion to a friend  new posts last

LARC
11-12-2015 @ 2:56 PM
Member
Posts: 19
Joined: Jun 2015
          
Dear forum:

47 Mercury is overheating in a short period of time even when it is parked. I was checking overheating problems and their solution at this forum as well at the link: http://www.vanpeltsales.com/FH_web/flathead_overheat_troubleshoot.htm which indicates 17 possible causes for overheating.
Both sources were very usefull. I live in South America, so the car is not using thermostat. I think the problem could be the radiator cap (see picture attached), but I am not sure what should be the pressure, I think it is 7# because this number is stamped in the cap and I guess this is the original one but I have seen picture in internet that says it is 4#.I replaced the cap for a 15# cap by mistake and it was a mess. The rigt pump started leaking! I think the other cause of overheating could be the engine timing, it sounds great but anyway I think I have to use a stroboscopy lamp to be sure it is running perfectly.
Finally, many people is advicing me to resurface the heads but it would be my last option.
I´m sorry for my poor english and thanks for listening me!

Regards!

LARC



TomO
11-13-2015 @ 7:33 AM
Senior
Posts: 7243
Joined: Oct 2009
          
Have you checked to make sure that the engine is really running hot? A candy thermometer can be used to check the coolant temperature. A bad sending unit can make you think that the engine is overheating.

You should have a 4 lb radiator cap. A bad radiator cap only causes overheating at highway speeds.

The most common cause of overheating is a plugged radiator. Next would be worn water pumps, followed by excessive debris in the block.

Ignition timing is set by the point opening time. You can use this procedure on Van Pelts site to check your ignition timing.

http://www.vanpeltsales.com/FH_web/flathead_engines_distr-timing.htm

Unless you are having a leaking head gasket, resurfacing the heads will not cure an overheating problem.

If it was my car, I would start by having the radiator cleaned professionally, by someone familiar with antique radiators. If you have any of the cooling tubes closed off because of a previous leak, you will have to have a new core with louvered fins installed.

Tom

LARC
08-31-2016 @ 12:36 PM
Member
Posts: 19
Joined: Jun 2015
          
Dear Forum:

Finally, my 47 Mercury is not overheating.

The theory said that in the distribuitor we have to djust the breaker gap to .014 to .016 inch but in did not work in this case. Intead I adjusted the breaker gap to .024 inch and the overheating problem is gone!

Thanks all of you for you support and TomO for your recommendations.

Regards!

LARC

ken ct.
08-31-2016 @ 1:57 PM
Senior
Posts: 1513
Joined: Jan 2010
          
I dout if a flathead would even run with .024 point gap. Are you adding the two sets together to arrive at that figure ????? ken ct.

LARC
08-31-2016 @ 2:45 PM
Member
Posts: 19
Joined: Jun 2015
          
Nop, .024 each one!

TomO
09-01-2016 @ 9:39 AM
Senior
Posts: 7243
Joined: Oct 2009
          
Larc,

You need a total dwell of 36 degrees to fully saturate the coil and develop a good spark. A point gap of .024 will not allow this to happen. I tend to agree with Ken CT that the engine would run very rough with that setting. Are you sure that you are using US feeler gauges, not metric?

Do you have access to a dwell meter? If so,please check the dwell.

Tom

<< previous || next >> 


NOTE: YOU MUST BE A REGISTERED USER AND BE LOGGED IN TO POST (and reply to) messages in this forum. If you are a first time user, please click the CREATE A NEW ACCOUNT in the masthead above to register and Log In. After that, all you do is LOG IN to enjoy using this site.

DISCLAIMER: The V-8 Club does no independent testing of any of the opinions, thoughts or suggestions presented in the website on the Forum, in the Tech Tips section, or any section. A reader should consider the website to be a forum wherein differing solutions to a particular set of circumstances may be discussed. Ultimately, the selection of an item for an individual's vehicle must be based upon the independent study of the vehicle owner in consultation with people in the hobby and restoration experts.


EFV-8 Club Forum Home | Back to Home Page | Contact the Webmaster

Copyright © 2009 - EFV-8.org
Powered by < CF FORUM > v.2.1