www.the351cforum.com

ALL things related to the Ford 351C
It is currently Tue Nov 20, 2018 9:50 pm

All times are UTC - 5 hours




Post new topic Reply to topic  [ 23 posts ]  Go to page 1, 2, 3  Next
Author Message
PostPosted: Fri Oct 27, 2017 9:56 pm 
Offline

Joined: Fri Oct 27, 2017 9:12 pm
Posts: 18
Location: Nampa, Id
I put my 351C 4V in my 31 Model A coupe about 30 years ago. Got married, raised kids, blah blah blah, and it sat for 15 years in the garage, buried under crap. Only occasionally dug it out to start it. Recently retired and decided its time to go thru and freshen the engine. Basically doing an inframe, as I have no means of pulling the engine now. Anyway, got the heads off and started looking around, cleaning, etc. and notice that there are holes in the intake chambers. Three in one head, and one in another. As far as I can tell, when the machine shop installed the screw in studs, they went a little too far, as that's where the hole goes. (I pulled the studs, and I can see the hole at the bottom.) I can't imagine that I didn't see that 30 years ago, so it got me to wondering how they would otherwise get there. Add to that, the fact that there is a rust spot inside the chamber on one cylinder, near the valve. The engine had antifreeze in it the whole time, so is it possible that the hole for the screw in stud is in part of the water jacket, and somehow rusted through ?
How it happened is one thing. What to do is next. If it is only connected to the stud hole, would it adversely affect engine performance. (street). Would it be tricky, or advisable to try to have it welded shut ?[img][img][img][/img][/img][/img]

_________________
Mike - Nampa, Id., via Reno/Sparks, Nv, Lawrenceville, Ga., Albuquerque, NM, and Terre Haute, In
31 Model A coupe w/ 351C- 4V & FMX
69 Triumph TR6 w/ 289 W & C4.


Top
 Profile  
 
PostPosted: Sat Oct 28, 2017 4:44 am 
Offline

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2417
Can you post a picture?

Normally when rocker studs go through, we just put thread sealant on the studs and go on with it.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Sat Oct 28, 2017 5:19 pm 
Offline

Joined: Fri Oct 27, 2017 9:12 pm
Posts: 18
Location: Nampa, Id
I tried to originally post a picture, but apparently failed. (it shows up as (img, img). I used the "choose file" to grab a picture. What is the right procedure ?

Thread sealant may account for why it took about 80 lbs of torque to unscrew the stud.

_________________
Mike - Nampa, Id., via Reno/Sparks, Nv, Lawrenceville, Ga., Albuquerque, NM, and Terre Haute, In
31 Model A coupe w/ 351C- 4V & FMX
69 Triumph TR6 w/ 289 W & C4.


Top
 Profile  
 
PostPosted: Sat Oct 28, 2017 5:34 pm 
Offline

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2417
I use an image hosting site to post pics here. Flickr has been my poison of choice lately, since Photobucket turned redcoat on us all.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Wed Nov 08, 2017 4:29 pm 
Offline

Joined: Fri Oct 27, 2017 9:12 pm
Posts: 18
Location: Nampa, Id
Well, nosed around in Flickr, but got nowhere. I guess the holes can stay. Moving on to next issue. Two intake valves, so far, have pitting where the valve seats. If I buy new valves, do they have to be machined to fit; or can I just replace? Or do I need to start a new thread? and are the single groove retainers direct replacements ?

https://imgur.com/a/m6TEq

Image
Image

_________________
Mike - Nampa, Id., via Reno/Sparks, Nv, Lawrenceville, Ga., Albuquerque, NM, and Terre Haute, In
31 Model A coupe w/ 351C- 4V & FMX
69 Triumph TR6 w/ 289 W & C4.


Top
 Profile  
 
PostPosted: Wed Nov 08, 2017 5:40 pm 
Offline

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2417
The valve angles have to match whatever angles that are on your seats. If the seats are pitted, then they would need to be touched up. I would replace them with single groove stems.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
PostPosted: Wed Nov 08, 2017 6:22 pm 
Offline

Joined: Wed Oct 31, 2012 11:24 am
Posts: 283
I ave some extra "super long" ( coarse thread end) Manley rocker studs. Long enough to protrude into the ports and allow you to grind them to the port shape. Originally sold for GM aluminum heads which had a habit of breaking stud bosses when a standard stud was used. Let me know if you want some.
Randy


Top
 Profile  
 
PostPosted: Wed Nov 08, 2017 8:52 pm 
Offline

Joined: Fri Oct 27, 2017 9:12 pm
Posts: 18
Location: Nampa, Id
Just to clarify, the valves have the pits. The seats in the heads, (so far) look OK.

_________________
Mike - Nampa, Id., via Reno/Sparks, Nv, Lawrenceville, Ga., Albuquerque, NM, and Terre Haute, In
31 Model A coupe w/ 351C- 4V & FMX
69 Triumph TR6 w/ 289 W & C4.


Top
 Profile  
 
PostPosted: Thu Nov 09, 2017 8:19 pm 
Offline

Joined: Fri Oct 27, 2017 9:12 pm
Posts: 18
Location: Nampa, Id
Are the stock valves bad enough to warrant replacing all with stainless anyway, since the heads are off? I'm not TRYING to spend money, but I would hate to tear it apart again down the road. In other words, is stainless that much better?
And would a dremel tool be strong enough to de-burr the intake ports; again since they're off and it only costs time. (the intake is a Torker)

_________________
Mike - Nampa, Id., via Reno/Sparks, Nv, Lawrenceville, Ga., Albuquerque, NM, and Terre Haute, In
31 Model A coupe w/ 351C- 4V & FMX
69 Triumph TR6 w/ 289 W & C4.


Top
 Profile  
 
PostPosted: Fri Nov 10, 2017 5:58 am 
Offline

Joined: Mon Oct 29, 2012 9:05 am
Posts: 2417
The factory multi-groove stems have a very bad reputation for breaking. New Ferreas are cheap enough that it would be a strength benefit and a flow benefit for you.

A Dremel doesn't have the power to really carve on cast iron. You need an air or electric die grinder.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 23 posts ]  Go to page 1, 2, 3  Next

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group