Hello, my trusty B23E has regulartappetty sound I have had two different mechanics look at it and they both say the gaps are fine and to not worry about it. I guess it is old but it is in great condition, doesnt blow smoke or lose oil etc. I have heard that these originally had rubber "Hushers" fitted to the top of the valve stems? Is this right on a B23E? If so is it a simple job for a handyman like myself to pull of the cam and bits to fit these or do I need a mechanic to do this? I am kind of hoping I can dismantle this with ease but not sure what is involved and what skills are needed to perform the job, does it need re-timing etc? I can handle nuts and bolts but timing is something I cant accomodate with my skills (and I don't have a light). Any pointers would be appreciated, ie; will it kill the tickety tick etc...?