Don't forget the valve cover or camshaft cover bolts, Mike. These are good to see at the end.Great engine!ServusBertl
The following photograph is of this particular aircraft after it was recovered from the crash site of the then pilot, Prince Karl.The photograph shows two pipes routed rearwards over the engine, from the coolant expansion tank.The Albatros D.I did not have a flush mounted radiator fitted into the upper wing, but had instead 'Windhoff' radiators located on the fuselage sides.My assumption is that the upper pipe was attached to the upper wing and vented to atmosphere any over pressurization in the cooling system.The lower pipe was possibly routed down inside the fuselage a cockpit coolant temperature gauge.Mike