Oil leaks, what a pain! I got oil on cam sprocket, inside timing cover to dripping from bottom of cover and oil filter bracket. Replaced filter bracket gasket but didn't help. Service manual says to use special tool to install cam seals. Is that tool pressing the seal into the head? Can it be done w/o the tool and is this tool expensive. If i'm getting oil on the sprockets then it should be the cam seals right?