I have a problem with a leak of antifreeze i checked it and the way it was leaking it looked like the lower hose so i took it off it looked fine but replaced it anyway so i test drove and antifreeze was running down the front of the engine i was thinking that it could be the by pass hose any suggestions

 

Check the waterpump. Do you hear any chirping sounds like a bearing going bad or what could be a idler pulley loosening? If so go straight to waterpump. You may need to replace your serp belt too as the anti-freeze and the rubber belt dont get along well with engine heat.