Hi, my son has an 8 year old manual 1.4 Peugeot 306, and has noticed a little amunt of oil on the ground overnight about the sixe of 3ins by 5 ins. He has looked at the engine block and it seems to be leaking at the joint of the cylinder head/engine block. This seems like a head gasket needing replacement. How can he tell? Could it be anything else? The engine sint losing power or anything, and there doesnt seem to be water contamination of the oil.
Thanks for any advice.
Paul