1994 5.7 marine power eng here is the ? im looking for zink in tank?this has dripless seals on shaft.hose goes to tank with clear hose.it looks to me that the zink was taken out.and fitting put in dripless fitting.if so thats ok but what do you do for the zink?the bolt on the end cap rotted of on the inside.causing cap to leak.do you think no zink caused this?any help would be great.thanks