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 / Engine health assessment help

   Reply to this DiscussionReply to Discussion | Start new discussionNew Discussion << previous || next >> 
Posted By Discussion Topic: Engine health assessment help

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

47merc68
11-23-2021 @ 2:29 PM
Member
Posts: 2
Joined: Oct 2021
          
I recently bought this '47 that has been partially restored, however the engine (and maybe the trany) need some attention. Since the previous owner passed away the records are not real robust. I need some advice on how to assess the health of the engine.

I started by replacing all the coolant hoses and repairing the radiator. I replaced the plugs which yielded much better starting and running. Since my temp gauge is broken, I put in a Bosch mechanical gauge on the passenger side to monitor temps. I tested it in boiling water prior to installing and found it to be about 10 degrees low. When the engine warms up, the 160 degree thermostats seem to open at the right temp which I verified with an infrared thermometer on the sensor housing. Interestingly, the right side warms up much faster than the left. Measuring temps on the sensor housings and heads shows that the left is about 15 degrees cooler than the right. Any thoughts on why this is?
I did a compression test and found that cylinders 1,2,3,4 & 8 were 120 psi; numbers 6 & 7 were 118 psi and number 5 was only 90 psi. My friend said those were good numbers but I am interested in hearing your feedback on this as well as why #5 was lower than the rest. I have not done a vacuum or oil pressure test yet. Thanks for your help and comments.

Also, does anyone know about the "made in Canada" and other nomenclature on the engine head? Does anyone know what the numbers mean on the head?


carcrazy
11-23-2021 @ 5:23 PM
Senior
Posts: 1048
Joined: Oct 2009
          
Things that might be causing the right (passenger's side) bank to run 15 degrees F hotter than the left bank: the thermostat on the hotter side may not be opening fully, the water pump on the hotter side may be less efficient than the other one, there may be some restrictions in the water jacket passages of the hotter side like gaskets or some other partial blockages and the thermostat of the hotter side may be cocked at an angle in the hose and partially blocking coolant flow out of the head.

The compression pressures sound reasonable. Do another compression test making sure to keep the throttle and choke plates wide open during the test. Allow the engine to crank at least 6 revolutions while doing the test and keep cranking until the pressure reaches a maximum.

Do a vacuum test on the engine at idle. If you have approximately 19 inches of vacuum and the reading is steady, you are good to go.

TomO
11-24-2021 @ 7:20 AM
Senior
Posts: 6833
Joined: Oct 2009
          
You have a very nice Mercury convertible. The "C7RA-A " heads are Canadian cast iron heads and have the same properties as the 59AB heads that should be on a USA made engine.

Do a wet compression test on cylinder 5 to see if it is a ring problem or a valve problem. The engine seems to be in very good condition.

Small differences in temperature between the 2 banks are normal and I would not worry about them.

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