Yesterday's Tractor Co. Fast, Friendly Parts Service
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life

Ford 9N, 2N & 8N Discussion Board

Re: Valve replacement

[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]

Posted by Bulldozer on November 09, 2012 at 19:58:45 from (

In Reply to: Re: Valve replacement posted by ASEguy on November 09, 2012 at 15:27:59:

After TOH furnished the stem diameter specs
measured al the valve stems with my B&S
1" micrometer.
Have the type of valve with constant diameter stems and solid valve guide rather than the mushroom type with the split valve guide.
The exhust valves were also non rotators.
The valve stems seem to wear more at the top of the valve.

All the valve stems were out of spec. and measured less than the allowable minimum diameter

The intake valves have the most wear.

The valve stems were worn on one side resulting in the valve stem not being round. One orientation measured within spec, Another orientation 90 degrees to the first showed the stem to be under spec diameter.
The worst valve was .005" under minimum spec tolerance. The wear spot was noticable with a step worn on the stem

This is the first time, have ever measured valve stems. All my other engine rebuilds were on 2 cycle outboard engines that have reed valves.

Based on the valve stem specs furnished by TOH
elected to replace all the valves.

The top of the valves appeared to have sufficent material for resurfacing. However, believe one consideration on re surfacing is the valve cannot seat too deeply, otherwise there will no tappet adjustment. That is the adjusment screw on the tappet could be bottomed out and the valve is not yet seated.

Another thing have experienced is the engine machinist is used to machining three angles on the valve and when you tell him that you want just a 45 degree cut, he looks at you cross eyed.

Thank you all for all the advice


Add a Reply



Optional Link URL:
Link Title:
Optional Image URL:
Optional Video Title:
Optional Video Embed:

Advanced Posting Options

Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

Advanced Posting Tools
  Upload Photo  Select Gallery Photo  Attach Serial # List 
Return to Post 

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2015 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters