Only Cub Cadets

PLEASE PATRONIZE OUR SPONSORS!

CC Speciaalties R. F. Houtz and Sons

Patton Acres IH Cub Cadet Parts

Cub Cadet Parts & Service


If you would like to help maintain this site & enhance it, feel free to donate whatever amount you would like to!




Attention Folks we have a new owner!
Greg Rozar AKA- CubDieselFan


Go Back   Only Cub Cadets > Cub Cadets > Cub Cadet Engines > Kohler Engines

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 03-23-2019, 08:56 PM
rsshallop rsshallop is offline
Senior Member
 
Join Date: Oct 2018
Location: Minden, Ontario
Posts: 136
Default Valve guide ID question - k241

I am at the very beginning of taking the measurements for the repair/rebuild of the engine on my cub cadet 108 fixer upper. The first ones I have taken are for the exhaust and intake valve guide ID's. Here is what I have come up with:

Intake valve guide ID
top of guide = .3125
mid-point of guide = 3125

Exhaust valve guide ID
top of guide = 3125
mid-point of guide = .3110

Now, what I don't fully understand is why the mid-point of the exhaust guide is under specs as given in the manual (.312/.313). I suspect it has something to do with overheating on the exhaust side of the top end. The fins there were packed with dirt when I took the engine out and cleaned it up and I believe this guide does show an issue that would probably cause the valve to stick. I would like to know how to address it (preferably without replacement). I have attached pictures of the general work, but the first pic is the main one. It is of the inside of the exhaust guide and it shows (as best I could) some kind of blemish at the mid-point of the guide. It appeared to me like cracked chrome.
Attached Images
File Type: jpg 008.jpg (3.9 KB, 60 views)
File Type: jpg 011.jpg (30.7 KB, 60 views)
File Type: jpg 012.jpg (31.2 KB, 59 views)
File Type: jpg 013.jpg (29.2 KB, 59 views)
File Type: jpg 018.jpg (21.5 KB, 58 views)
File Type: jpg 015.jpg (24.1 KB, 58 views)
File Type: jpg 016.jpg (25.1 KB, 58 views)
Reply With Quote
  #2  
Old 03-24-2019, 08:37 AM
R Bedell R Bedell is offline
Administrator
 
Join Date: Mar 2007
Location: Michigan
Posts: 13,693
Default

Replace the Guides. Not expensive nor hard to do.

__________________
Roland Bedell

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

Buy: Made in the USA
Reply With Quote
  #3  
Old 03-24-2019, 09:32 AM
ol'George's Avatar
ol'George ol'George is online now
Grand Member
 
Join Date: Oct 2009
Location: MI
Posts: 6,610
Default

In a nutshell, good advice from Roland.
First off,
a caliper, while reasonably accurate most times, leaves a lot to "feel"/operator expertise.
You were able to read the difference between the worn part @ the top/bottom/center of the guide, but a mike will give you a more accurate reading.
Also throw in the variable factor of a telescoping gauge, read by a caliper.
and you get accumulation of error.

If you were to use that method on a freshly bored and accurate cylindrical hole,
and compared a mike to a caliper you would see a difference.
Then set a dial bore gauge in the cylinder, you would be surprised at the variance.
Never use a caliper to check a crank diameter except get an idea of if it has been turned, same for cylinders

My Mitutoyo DRO caliper and an old 16" Starrett vernier caliper as old as me, while having their place in the shop, are not as accurate as
my complete set of Starrett mikes.

Now as far as the appearance of an undersized Ex guide @ midpoint,
if you slide in a hand reamer, you will prolly find carbon on it when you bring it out,--- it happens.
If,
your readings are accurate, the guides are usable once you get the carbon out of the Ex guide.
How worn are the valve stems ( using a mike)??
Reply With Quote
  #4  
Old 03-24-2019, 12:03 PM
MikeMasheris's Avatar
MikeMasheris MikeMasheris is offline
Senior Member
 
Join Date: May 2012
Location: South Elgin, Illinois
Posts: 283
Default

ream the guides to .312 5/16 and call it good you can put new guides in and ream and be right back where you started.Ream and put in new valves grind the seats if worn and lap in
Reply With Quote
  #5  
Old 03-24-2019, 02:17 PM
rsshallop rsshallop is offline
Senior Member
 
Join Date: Oct 2018
Location: Minden, Ontario
Posts: 136
Default

Roland, ol'George, MikeMasheris, Thanks for your insight. time for me to invest in more tools (micrometer set, 5/16 reamer) before I go any further.
Reply With Quote
  #6  
Old 03-24-2019, 04:54 PM
ol'George's Avatar
ol'George ol'George is online now
Grand Member
 
Join Date: Oct 2009
Location: MI
Posts: 6,610
Default

Quote:
Originally Posted by rsshallop View Post
Roland, ol'George, MikeMasheris, Thanks for your insight. time for me to invest in more tools (micrometer set, 5/16 reamer) before I go any further.
Do not get an adjustable reamer, just a regular hand reamer
( straight or spiral)
Example: ebay #
143147990500
Reply With Quote
  #7  
Old 03-24-2019, 05:06 PM
rsshallop rsshallop is offline
Senior Member
 
Join Date: Oct 2018
Location: Minden, Ontario
Posts: 136
Default

OK, just bought it. Too bad there isn't an emoji of someone throwing around money like a drunken sailor...
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


All times are GMT -4. The time now is 12:04 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.

Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

This website and forum are not affiliated with or sponsored by MTD Products Inc, which owns the CUB CADET trademarks. It is not an official MTD Products Inc, website, and MTD Products Inc, is not responsible for any of its content. The official MTD Products Inc, website can be found at: http://www.mtdproducts.com. The information and opinions expressed on this website are the responsibility of the website's owner and/or it's members, and do not represent the opinions of MTD Products Inc. IH, INTERNATIONAL HARVESTER are registered trademark of CNH America LLC

All material, images, and graphics from this site are the property of www.onlycubcadets.net. Any unauthorized use, reproductions, or duplications are prohibited unless solely expressed in writing.

Cub Cadet, Cub, Cadet, IH, MTD, Parts, Tractors, Tractor, International Harvester, Lawn, Garden, Lawn Mower, Kohler, garden tractor equipment, lawn garden tractors, antique garden tractors, garden tractor, PTO, parts, online, Original, 70, 71, 72, 73, 76, SO76, 80, 81, 86, 100, 102, 104, 105, 106, 107, 108,109, 122, 123, 124, 125, 126, 127, 128, 129, 147, 149, 169, 182, 282, 382, 482, 580, 582, 582 Special, 680, 682, 782, 782D, 784, 800, 805, 882, 982, 984, 986, 1000, 1015, 1100, 1105, 1110, 1200, 1250, 1282, 1450, 1512, 1604, 1605, 1606, 1610, 1615, 1620, 1650, 1710, 1711, 1712, 1806, 1810, 1811, 1812, 1912, 1914.