Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-05-2015, 07:02 PM   #81
Charlie ny
Senior Member
 
Join Date: May 2010
Posts: 2,531
Default Re: 51 Merc v/8 into 40 ford

Just my 2 cents......Don't run it anymore without a load....that said we're talking a
flathead motor...small bore long stroke pretty stiff ring pressure, probably no harm
has been done. On the other hand big bore short stroke and low tension rings......
harm could easily be done.....I'm talking those out dated ohv motors.
I certainly respect other points of view.......this view is mine.
Gracias,
Charlie ny
Charlie ny is offline   Reply With Quote
Old 05-05-2015, 07:04 PM   #82
Charlie ny
Senior Member
 
Join Date: May 2010
Posts: 2,531
Default Re: 51 Merc v/8 into 40 ford

Guys,
We're closing in on 100 replies !
Charlie ny
Charlie ny is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-05-2015, 07:29 PM   #83
dixiedelux
Member
 
dixiedelux's Avatar
 
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
Default Re: 51 Merc v/8 into 40 ford

Quote:
Originally Posted by Charlie ny View Post
Just my 2 cents......Don't run it anymore without a load....that said we're talking a
flathead motor...small bore long stroke pretty stiff ring pressure, probably no harm
has been done. On the other hand big bore short stroke and low tension rings......
harm could easily be done.....I'm talking those out dated ohv motors.
I certainly respect other points of view.......this view is mine.
Gracias,
Charlie ny
I respect your point of view Charlie. You are backing up Jseery's. I have never heard about damage being done by lack of load, but it you guy's experience and expertise that I am hoping to benifit from. I remember years ago, at a big event (probably a big street rod gathering) a guy in the vendor area had a bad ass blown flathead he was demonstrating. It seemed that every hour he would crank it up on the test stand and let it run for 10-12 minutes to gather a crowd, me included. From that experience I assumed that was the puurpose of a test stand: to test the engine. I wouldn't feel right buying the mill without at least hearing it start up and run. I have heard guys lamenting that they sure wish they could hear it run when talking about a new or different engine. I thought this was a real advantageous situation for to have a potential purchase on a test stand. Charlie, when you rebuild, do you go straight from the rebuild stand into the millhouse?
dixiedelux is offline   Reply With Quote
Old 05-05-2015, 08:24 PM   #84
Binx
Senior Member
 
Join Date: Oct 2011
Location: Gloucester VA
Posts: 1,042
Default Re: 51 Merc v/8 into 40 ford

Putting the load on a newly rebuilt engine as well as varying the "on" and "off" throttle is to get the rings to seat properly. A hard throttle builds pressure inside the ring grooves to force the rings out to the cylinders as well as mating the ring to the piston's ring land. Off throttle draws a hard vacuum and pulls oil up the cylinder wall (as much as oil control rings will allow) to cool and disperse metal shavings and carbon particles as the rings literally scrape the the rough surface of a honed cylinder and lap themselves. I don't doubt what charlie ny says about high tension rings - especially iron. They'll seat to the walls quickly but only a healthy on-and-off load will get them to seat to the ring lands.

Lonnie

Last edited by Binx; 05-05-2015 at 09:10 PM. Reason: removed more cuss words
Binx is offline   Reply With Quote
Old 05-05-2015, 08:32 PM   #85
dixiedelux
Member
 
dixiedelux's Avatar
 
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
Default Re: 51 Merc v/8 into 40 ford

Ok Lonnie, that is some pretty heavy-duty stuff. I am convinced now that I should start and run the engine only for a short time, listening for strange sounds, leaks and checking oil pressure. Or should I just do a compression check and tell him to load it up, if compressin checks. What would you do, Lonnie?
dixiedelux is offline   Reply With Quote
Old 05-05-2015, 08:57 PM   #86
Binx
Senior Member
 
Join Date: Oct 2011
Location: Gloucester VA
Posts: 1,042
Default Re: 51 Merc v/8 into 40 ford

Sponsored Links (Register now to hide all advertisements)
I've never been in your shoes before but if I was, I would ask for a warranty/guarantee since you expect it to be a solid engine and he is selling it as such.

Lonnie
Binx is offline   Reply With Quote
Old 05-05-2015, 09:40 PM   #87
Charlie ny
Senior Member
 
Join Date: May 2010
Posts: 2,531
Default Re: 51 Merc v/8 into 40 ford

Dix,
Quick run in on the stand ( with mufflers ), ck oil pressure, look for leaks,
listen for strange noises with my dear old Dads huge screw driver. All at about 550
to 600 rpm. I do use diesel grade oil for this then drain it and go to Rotella. Total
time less than 10 minutes.......depends on how nervous I get.
Charlie ny
Charlie ny is offline   Reply With Quote
Old 05-05-2015, 09:47 PM   #88
dixiedelux
Member
 
dixiedelux's Avatar
 
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
Default Re: 51 Merc v/8 into 40 ford

Ok, sounds good Charlie. Rotella for continued use? That is what I have been using in my babbit pounder chevy 6 (15-40) for a few years now.
dixiedelux is offline   Reply With Quote
Old 05-06-2015, 10:36 AM   #89
dixiedelux
Member
 
dixiedelux's Avatar
 
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
Default Re: 51 Merc v/8 into 40 ford

How much compression should the Merc show, Optimum? 110-120?
With the rings not sealed, I won't expect to see optimum pressure, but I will look for consistency between cylinders. What compression numbers should I see on a fresh rebuild?
dixiedelux is offline   Reply With Quote
Old 05-12-2015, 06:39 PM   #90
dixiedelux
Member
 
dixiedelux's Avatar
 
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
Default Re: 51 Merc v/8 into 40 ford

10426550_10203383990755169_2684401288628944863_n.jpg

I hope this proves to be a happy union!
dixiedelux is offline   Reply With Quote
Old 06-09-2016, 07:44 PM   #91
dixiedelux
Member
 
dixiedelux's Avatar
 
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
Default Re: 51 Merc v/8 into 40 ford

I have the engine in my 40 ready to pull out with the exception of chatter rod removal. At the frame, does it take an inserted square socket to remove chatter rod? I have chatter rods loosened at the block. Will the block side over the rod easily?
dixiedelux is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 02:48 PM.