Originally Posted by BOBCRMAN@aol.com
I have used the K-liners since 1994 with very few problems. The spiral grooving keeps oil in the guide and close clearances can be maintained. The secret is proper installation and trim, good valve stems (polished) assembly lube and snug initial fit.
I have pulled some of these heads with 250+thousand miles on them and had little wear problems.
I use them in my own engines.
How snug are you installing them on the intake and exhaust? Ball park figure