02-04-13, 07:46 AM
Not beyond the realms of possibility that a previous owner has put oil in the header tank by mistake - it happens!
I am with Mike, drain and flush the cooling system and then see what develops. If oil reappears then further investigation will be needed, if not crack open a beer and say "Phew!".
Whale
I am with Mike, drain and flush the cooling system and then see what develops. If oil reappears then further investigation will be needed, if not crack open a beer and say "Phew!".
Whale
On the Gas! 
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