|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
05-05-2015, 07:02 PM | #81 |
BANNED
Join Date: May 2010
Posts: 3,019
|
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 |
05-05-2015, 07:04 PM | #82 |
BANNED
Join Date: May 2010
Posts: 3,019
|
Re: 51 Merc v/8 into 40 ford
Guys,
We're closing in on 100 replies ! Charlie ny |
Sponsored Links (Register now to hide all advertisements) |
|
05-05-2015, 07:29 PM | #83 | |
Member
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
|
Re: 51 Merc v/8 into 40 ford
Quote:
|
|
05-05-2015, 08:24 PM | #84 |
Senior Member
Join Date: Oct 2011
Location: Gloucester VA
Posts: 1,042
|
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 |
05-05-2015, 08:32 PM | #85 |
Member
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
|
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?
|
05-05-2015, 08:57 PM | #86 |
Senior Member
Join Date: Oct 2011
Location: Gloucester VA
Posts: 1,042
|
Re: 51 Merc v/8 into 40 ford
Sponsored Links (Register now to hide all advertisements)
Lonnie |
05-05-2015, 09:40 PM | #87 |
BANNED
Join Date: May 2010
Posts: 3,019
|
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 |
05-05-2015, 09:47 PM | #88 |
Member
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
|
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.
|
05-06-2015, 10:36 AM | #89 |
Member
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
|
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? |
05-12-2015, 06:39 PM | #90 |
Member
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
|
Re: 51 Merc v/8 into 40 ford
|
06-09-2016, 07:44 PM | #91 |
Member
Join Date: Aug 2011
Location: Columbia, KY
Posts: 89
|
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?
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|