First post here so please be gentle! Interesting problem for you. This is about my 998cc Sprite engine.
The valve clatter just got intolerable again. Pulled out a cam follower (lifter I believe to you guys over there). Same old problem. Face eroded and vertical score marks on the sides. This is 3,000 miles after the third rebuild in 13,000 miles. Cam is a new (or was) Kent 276, new Minispares followers, new cam bearings, lube used on assembly, broken in exactly as per Kent instructions. No spring binding, clearances exactly to spec (but now impossible to keep right of course). Rocker bushes checked and OK, geometry adjusted by shimming the pillars. Oil is Duckhams 20/50, and gives 60 psi hot with a 10-row cooler. What more can I do? I have gone through 3 cams so far. Never had any probs like this over the last 40 years with A-series lumps. /ubbthreads/images/graemlins/frown.gif
The valve clatter just got intolerable again. Pulled out a cam follower (lifter I believe to you guys over there). Same old problem. Face eroded and vertical score marks on the sides. This is 3,000 miles after the third rebuild in 13,000 miles. Cam is a new (or was) Kent 276, new Minispares followers, new cam bearings, lube used on assembly, broken in exactly as per Kent instructions. No spring binding, clearances exactly to spec (but now impossible to keep right of course). Rocker bushes checked and OK, geometry adjusted by shimming the pillars. Oil is Duckhams 20/50, and gives 60 psi hot with a 10-row cooler. What more can I do? I have gone through 3 cams so far. Never had any probs like this over the last 40 years with A-series lumps. /ubbthreads/images/graemlins/frown.gif