clueless 2,893 #1 Posted September 8, 2018 Cleaned up the k181 on a B-80 I acquired a couple of years ago. New fuel pump, carb, fuel lines, points and plug. Pulled the head, piston and cylinder looked decent, cleand the head and valves, put a new Kohler head gasket on and torque the bolts. It runs great, no smoke but I do smell oil coming from the exhaust. When running the noise is more of a rattle than a knock, but could be a knock I'm not sure. After checking my HF torque wrench against my 50+ year old craftsman beam torque wrench, it is definitely not accurate, I may have over torqued the head. Could the noise be the valves? Share this post Link to post Share on other sites
stevasaurus 22,197 #2 Posted September 8, 2018 Sure, the noise could be the valves. These are solids on this engine. Take off that breather plate just behind the carb and you can check the clearances. If it is the exhaust valve, you might just have to have it re-ground for the seat and re-check the clearance. Share this post Link to post Share on other sites
WH nut 553 #3 Posted September 16, 2018 Check your point setting, they can cause a knock/rattle Share this post Link to post Share on other sites
clueless 2,893 #4 Posted September 16, 2018 1 hour ago, WH nut said: Check your point setting, they can cause a knock/rattle Closed more, or opened more, would either way cause a knock? Share this post Link to post Share on other sites
WH nut 553 #5 Posted September 16, 2018 If they were set too tight Share this post Link to post Share on other sites
stevasaurus 22,197 #6 Posted September 16, 2018 The points control your timing. Factory is .020 but it seems some of the older "K" series run better when the points are set at .018 Share this post Link to post Share on other sites