Wheelhorse#1 1,738 #1 Posted October 25, 2022 Correct type and size for the k181 ? thx 1 Share this post Link to post Share on other sites
Heatingman 971 #2 Posted October 25, 2022 Just need grade 8 bolts. Take yours to the hardware store to match the thread and pitch and length 1 Share this post Link to post Share on other sites
squonk 41,940 #3 Posted October 25, 2022 Yes 5/16 X 1 1/2' Grade 8. I use flange head bolts when I can but not necessary. 2 Share this post Link to post Share on other sites
Jeff-C175 7,203 #4 Posted October 25, 2022 Help me understand why to use new head bolts? These are not 'torque to yield' as used in many automotive applications, which always get replaced. At 25-30 ft/lb of torque, those head bolts are certainly not being 'stretched'. What am I missing? 1 Share this post Link to post Share on other sites
squonk 41,940 #5 Posted October 25, 2022 Heat stress for 1 thing. Quite often I find the bolt threads all goobered up from rust, carbon, gunk , carbunkles ect . Cheap (fairly cheap insurance) 4 Share this post Link to post Share on other sites
Wheelhorse#1 1,738 #6 Posted October 25, 2022 I just rebuilt a k-181 and noticed a couple of them were questionable by the exhaust mainly and would come loose even after re torquing a couple time so decided to replace. Cheap insurance as Mr Squonk noted . Thanks for the response ! 3 Share this post Link to post Share on other sites
