im lossing coolant somewhere aand cant seem to find where from iv have replaced a few hoses and renewed alot of clamps. but still if i top my water up to the max line after about 4 miles driving come back and im just above the min again i have no headgasket systoms ie, no smoke no sludge car runs fine and starts lovely and runs perfect on morning starts ,but still i seem to lose a water somewhere. Deos anyone have any ideas can the cap cause this problem and if so is there anywhere online i can source one cheers guys