mroman59 Posted May 28, 2014 Posted May 28, 2014 If a hydraulic lifter goes bad, i.e. does not fill with oil or for what ever reason does not work properly, will that eat up your cam shaft lobe? One of my lobes got eaten up out of the four and some are saying that the malfunctioning lifter should not do that and that it has to be something else that is causing it to hang up or impede movement. For example, a bad or sloppy bore where lifter cant move or something in the spring/valve on the cylinder head that is impeding movement. One person told me today that the lifter indeed will cause the camshaft to ware quickly. Also, I am assuming that you should replace all lifters when you replace a camshaft. Some disagree on this too. Thoughts appreciated. thanks, MR
mroman59 Posted May 28, 2014 Author Posted May 28, 2014 Thanks , I was told that by someone else, but the question is , when the seals or ram go bad, or both ... will that cause the cam shaft lobe to wear down and I mean wear down quickly. If not, what else can cause the lobe to wear? Only one of the four is worn badly and the other 3 lobes look like little or no wear. MR
fishnwiz Posted May 28, 2014 Posted May 28, 2014 What else is riding on that lobe that would cause such wear? IMO it has to be a bad lifter causing such wear. Those lobes are hardened steel.I am amazed that you could have such wear so quick!
mroman59 Posted May 28, 2014 Author Posted May 28, 2014 I hope it is just the lifter. I don't want to put in new cam and new lifter and then have the same thing happen. I just purchased a new cam and 4 new lifters. Is everyone in agreement that you need to replace all the lifters when you replace a cam shaft? I called the local Simplicity dealer and asked the price of the parts. The parts department asked the mechanic if you need to replace all of them with new cam. The mechanic said not generally, only when there is a dimple starting to form in one of them. I stopped at a local automotive engine repair shop who has a store and does small engine repair also. The parts dealer use to be a mechanic and said that you should change all the lifters. Regardless of the answer, I purchased four new ones. However, I am surprised on the number of different answers I get. Maybe a lawnmower engine is different that automotive engine. Also, is anyone aware of a break in method after installing new lifters. My manual does not describe one, but some people are saying you need to run it at so many rpms for certain time for breaking in. I don't know what is recommended for a Kohler CV740S 27HP. thanks, MR
Multiplicity Posted May 29, 2014 Posted May 29, 2014 . .. ...I know a Kohler Mech who has discovered that "The Kohler Oil" recommended for these engines has special additives that make it the best choice to use with Kohler Engines w Hydraulic Lifters - if this might help your situation....It seems that other oils do not have quite the same "anti-foaming" characteristics needed to protect this system...... .
mroman59 Posted May 29, 2014 Author Posted May 29, 2014 quote:I know a Kohler Mech who has discovered that "The Kohler Oil" recommended for these engines has special additives that make it the best choice to use with Kohler Engines w Hydraulic Lifters - if this might help your situation id="quote">id="quote"> Thanks, I will check into that. A mechanic told me that they get gummed up so I think to prevent that in the future, after I install new cam and lifters I will make sure I use a good quality oil and additive in necessary. I didn't know that Kohler had their own Oil. thanks, MR
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