Questioni have a john deere lt160 with a kohler cv460s-26516 ser#3306510013 family #3khxs.4902gb this unit started running bad after an oil change, i was told i used the wrong oil(30wt) changed to 10w-30 and still pops back through the carb. i was told that i siezed the hyd. lifters so i put in new kohler lifters and head gasket, and cleaned and lapped the valves. still runs bad, was told to chk. flywheel key, checked and changed the key, still no luck. heres what i see but dont know why its happening both rockers are moving good during the cranking(.125 to .250 movement) but when it starts with any luck, the intake keeps moving about the same but the exhaust seems to be moving next to nothing, and only a little exhaust is coming out, and the rest seems to go out the carb, it will only run up to about 200-300- rpm when it will run. thats the deal was wondering could this b a broken cam shaft , or something else? any help would be of great help as my grass is rather tall by now, thank you! matt
AnswerHello Matt:
>>Sorry for the Delay. This Question was Located in the Question Pool and I can Only Answer Questions from the Question Pool when I am Not Answering Questions here or at the Other Site I Answer Questions at.
>>Kohler use Hydraulic Lifters in Most of their Engines.
>>From your Description it Sounds like this Engine has a Collapsed Lifter, a Bent Push Tube or a Bad Camshaft Lobe.
>>Check the Push Tubes.
>>The Steel Tube is for the Exhaust Valve.
>>If the Push Tube is Not Bent, then
>>Remove the Engine from the Frame and Open the Crankcase the Camshaft for Damage.
>>If the Camshaft Lobes are Good, then
>>The Engine Most Likely has a Bad Lifter.
>>You can View a Breakdown/IPL of the Engine and Mower at this Site Addy, http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.H... and Enter the Model Numbers and Click Find. Then Select your Model from the Search Results Area. Then Select the Sectional File. Then Select the Section of the Mower you Wish to View Online. *You can Drag the View Windows for Better Viewing.*
>>The Following is a Basic Instruction File for Examining the Inside of a Small Engine and will Assist you in having Access to the Governor, Oil Pump (if Applicable), Cam and Crankshaft Gear. Any Input is Appreciated.
>>**This is a Simple Process. Drain the Oil and Remove the Engine to the Work Bench with the Oil Pan Facing Up. I have a Wooden Rest that was Especially Made to Hold the Engine when in this Position.
>>Using Fine Sand Paper, Remove ALL the Rust and Debris from the Crankshaft.
>>Remove ALL the Oil Pan Bolts.
>>After All the Oil Pan Bolts are Removed; Tap Lightly on the Sides of the Oil Pan to Loosen it from the Dowel Pins.
Sometimes you May have to Use a Flat Screw Driver or Chisel Between the Oil Pan/Sump at the Areas Neat to the Dowel Pin and Loosen the Oil Pan/Sump.
>>When the Oil Pan is Removed, you can See the Governor Resting on Top of the Cam Gear.
>>****If Required: Lift Off and Replace with a New Governor. Check the Engine Block for Debris from the Old Governor and Wipe the Inside of the Block With a Rag, Until Clean. Set the Governor Shaft So it will be Resting on the Governor whine the Oil Pan is Replaced and Carefully Replace the Oil Pan. If the Crankshaft Seal Was Not Leaking, then Leave it Alone. It Should be OK. You can Easily Replace it While Mounted on the Machine if Required Later. Make Sure the Governor Stays in Contact with the Governor Shaft while Replacing the Oil Pan. Re - Mount the Engine to the Machine. Refill With Oil. Your Internal Governor May Differ.**
>>If you Hit a Snag or this Does Not Correct the Problem, I Hope to be Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.
Good Luck
Respectfully
John
PS: I am Allowed to Answer 5 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.
Respectfully
John
