- Aug 8, 2005
With the Addition of Ethanol in Canadian fuels now prevalent in most fuel stations, I was wondering if there are problems using the bronze valve guides. I am working on my head and am thinking of going back to the Cast Iron valve guides if the bronze units will cause problems. Does anyone have experience or input on using these for street use? I have heard from some sources that the lubricants that use to be used in fuels (leaded fuel) are no longer present and the bronze guides gall because of lack of lubricants and the Ethanol additives used in the fuel.