Hello guys. I replaced the radiator in my 00 K2500 with a 5.7. The engine oil cooler is located on drivers side of the radiator. The existing engine oil cooler lines threaded into the radiator without the need to use the adapters provided. My issue is the seal/ o-ring. What was previously on the line was a thin flat rubber ring. I replaced the rings with O-rings out of one of my kits and every time I tightened up the lines the o-ring was cut and damaged. I then picked attempted to use OEM O-rings from my parts supplier. Those also were cut and damaged during install. I ended up using some that I had in another kit, tightened the lines and put it back together. I attempted install with at least 4 different o-ring sizes, lubricated with grease and dry. I am not satisfied with this job. Has anyone else found a better seal or o-ring?