|
PLEASE PATRONIZE OUR SPONSORS!
|
|||||||
 |
|
|
Thread Tools | Display Modes |
|
#1
09-11-2011, 04:03 PM
|
||||
|
||||
Tore into the 12 hp Kohler today and....
I believe I found out the big oil consumption..I took the head off,looked things over and think the issue is in the valves themselves. I removed the valve springs and keepers,pulled the valves out. When I looked in the hole where the valve guides are,I found a quarter sized piece in under the valve seat. Upon investigation,It appears to have been some black carbon.I squeezed it and it broke apart. The valves are coated with a heavy sooty carbon and there is a burnt looking carbon on the valve stem of the exhaust valve. I pulled the valves out and there seemed to be no slop and seemed decent. When looking at the piston and cylinder,they looked clean and it seems that there isn't any slop,scoring etc.As a matter of fact,I can still see some cross hatching in the cylinder,which amazes me. I am going to borrow a bore gauge to see how much wear there is in the cylinder. The whole valve area is soaked with the oil. Question is,could I get lucky by replacing the valves and possibly the guides? Will I have to disassemble the motor and remove it or could they be done with the motor on the tractor?Anyone know the part numbers for the valves,valve springs as well as guides?
__________________
Pat Harmon Loganton,Pa 128 Cub Cadet 1200 Cub cadet (Red) LT 1042 Cub Cadet 1200 Cub Cadet 165 Hydro John Deere 1941 John Deere H 1950 David Bradley 5756 1952 David Bradley 57561 Super Power 
|
|
#3
09-11-2011, 04:28 PM
|
||||
|
||||
|
To put new guides in you will have to disassemble the motor, the cam and lifters will have to come out. You might have a machine shop measure the diameter of the guides first and see if they are still in spec. If they are then you can just go with new valves and springs.
__________________
DWayne 1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck 10" moldboard plow 2016 XT1 42" deck 18HP
|
|
#4
09-11-2011, 05:46 PM
|
||||
|
||||
|
Thanks DWayne..I sorta figured about the guides.I did some searching and guess I did a good job as they are the same numbers I came up with..
__________________
Pat Harmon Loganton,Pa 128 Cub Cadet 1200 Cub cadet (Red) LT 1042 Cub Cadet 1200 Cub Cadet 165 Hydro John Deere 1941 John Deere H 1950 David Bradley 5756 1952 David Bradley 57561 Super Power
|
|
#5
09-11-2011, 05:54 PM
|
||||
|
||||
|
You will also need to get a valve guide reamer for the new guides to get the correct diameter. I picked mine up off of Evil Bay.
__________________
DWayne 1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck 10" moldboard plow 2016 XT1 42" deck 18HP
|
|
#6
09-11-2011, 07:15 PM
|
||||
|
||||
|
Normally a valve guide has to be really bad sloppy to cause oil consumption.
If it were mine, I would be looking @ the rings. If you are actually seeing a crosshatch still on the wall,I would think somebody has been in there before and maybe their in lies the problem.
|
|
#7
09-11-2011, 08:03 PM
|
||||
|
||||
|
I agree with you George,but I just got in from the garage.I cleaned the valve seat as well as the valves. Therin,I now feel confident that I have located the issue. When I looked at the valve stem,it is pitted above the valve guide and looks very rough.Then,when looking at the valve seat face on the valve,you can see the center is corroded to the point of it being dented in looking. I am going to try to find some possible used valves and grind the 45* on them using my valve grinder. I tried lapping the exhaust valve and the seat seal was in the center of the valve and valve seat. Therefore,I think a valve swap will not harm anything. When I move the piston, I have minimal side to side play. We'll see though. I really would rather spend money for a replacement 14 hp motor than sink 3-4 hundred in this 12 hp motor..
__________________
Pat Harmon Loganton,Pa 128 Cub Cadet 1200 Cub cadet (Red) LT 1042 Cub Cadet 1200 Cub Cadet 165 Hydro John Deere 1941 John Deere H 1950 David Bradley 5756 1952 David Bradley 57561 Super Power
|
|
#8
09-11-2011, 08:16 PM
|
||||
|
||||
|
I have used new aftermarket valves before with pretty good results...that'd be another cheap option if you're just trying to get by while waiting for a bigger engine. I think they were like $12 each or something like that from Tulsa Engine Warehouse.
|
|
#9
09-11-2011, 08:34 PM
|
||||
|
||||
|
That's exactly what I am aiming for Matt..I just need it to make it through the winter plowing season. I may even try to sell it or trade it off for a 149. The motor had all sorts of good power through the rpm range,it just pushed the oil out of the muffller and all over the grille etc. If I decide to keep it, I want to upgrade it like stated above..
__________________
Pat Harmon Loganton,Pa 128 Cub Cadet 1200 Cub cadet (Red) LT 1042 Cub Cadet 1200 Cub Cadet 165 Hydro John Deere 1941 John Deere H 1950 David Bradley 5756 1952 David Bradley 57561 Super Power
|
|
#10
09-11-2011, 09:50 PM
|
|||
|
|||
|
My 2 cents what about the valve seals . you may have carbon grit keeping the valve open . I test valves with a snap throttle test before tear down - you could reassemble the valves and with fluid on the combustion side blow compressed air on the other to see the leaks. don,t know about kolers but usually the seats warp and leak three times more than valves you might have the guides knurrled at a machine shop.
rings probably clogged ,leaking -seized 128
|
|
|
|
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.
Linear Mode
