The reason I am asking is that i just changed my pump. the old one lasted for less than a year, as I ran it with only water for a week when i first installed it ( i was trying to clean out residue after my head-gasket) .....I will not repeat that mistake now....

Thanks, I will try to get the water/coolant tester to make sure i have enough g-05 in there ....

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1993 300E, 2.8 M104 .....