LaBoyteaux
Member
Back on 5/21 I posted a message about valve adjustment on my 1066. One valve in particular getting loose after only about 30 hours. Checked cam lift and found all equal, then found excessive wear at the cup end of the push rod. Apparently top end oiling was a problem in some earlier 400 series engines. Articles in Red Power suggested drilling additional oil passage in the rocker or replacing entire rocker shaft with one from a 466 truck engine. Went that route. Problem is the rocker shaft stands are just 2" tall where the original 414 stands were 2.5" tall. The 466 rocker shaft is a great solution since the rockers are cast and provide positive lubrication. There must be some option with the taller stands. I hope you IH guys can direct me.