For about past 400 hours I have checked tappet gap with.0.2mm and never adjusted gaps but yesterday I tried 0.25mm feeler gauge and noticed it would just fit in many of the gaps. Naturally I readjusted them all back to 0.2mm
My question is in past I have always noticed gap closing up especially exhaust but never seen all gaps opening up. The local VW man George always says clacky tappets are happy tappets. Has anybody out there got an idea what is happening? This engine runs very cool and oil only just gets to 75degC (the min). It has reached the stage I am now fully blocking off air to cooler to get temp up and am using 10W40! I even bought new oil temp gauge and probe and still the same very low temp, while pressure is always close to 4atm. It never needs a top up in 50hrs. Any thoughts out there. The only failure in 500hr was a tappet cover cork had a crack and put in new plugs at 500 has for something to do (Limbach 3 probe plug). Limbach are great engines & I reckon the TBO should be upped to 1600hrs like L2400 or whynot 1200hrs like L1700 at a minimum. Come on Limbach do your paperwork. Ian Mcphee
