Originally Posted by laboyma53
I have one valve (apparently it has too much clearance) or the Hydraulic Lifter is stuck in place. I read that the Hydraulic Lifters do not need to be adjusted. How do I get rid of the clicking noise? Do I remove the valve cover and see if there is any other malfunction? Suggestions - comments - get me started. It has been a long time since I have been inside an engine.
Before I remove the valve cover, I'd hold a stethoscope up to the cover to try to determine which valve is clicking. In my case, the clicking turned out to be from a worn rocker, and replacing it eliminated the clicking. However, if you want to do the job correctly, you may also need to change the shims or thrust washers that sit on the valve, which requires using the Go-NO Go gauge that MB specifically designed for that job, and buying several shims.
OTOH, the clicking could be caused by a stuck lifter, as you mentioned. If that's the case, you could try adding a can of Marvel Mystery Oil to the crank case, since many MB owners in this and other forums have stated that Marvel freed up their stuck lifters.
Finally, the clicking could be coming from a loose valve guide, in which case the only solution is to do a valve job. But, hopefully, that won't be necessary.
In any case, good luck!