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Author Topic: positioning drain holes in new water pump  (Read 2179 times)

rutger kohler

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positioning drain holes in new water pump
« on: July 31, 2012, 07:05:45 »
I am replacing my water pump impleller/bearing unit. There are two drain holes in the housing diametrically opposed to each other, should these be positioned at the top and bottom when the unit is bolted in?  It appears the fixing bolt holes on the flange would allow the housing to be bolted with the two holes  in other postions.
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1969 280 SL Manual gear shift
1972 280SE 3.5 auto

Benz Dr.

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Re: positioning drain holes in new water pump
« Reply #1 on: July 31, 2012, 14:56:43 »
Try to keep one hole at or near the bottom. The hole is for drainage in the event the pump starts to leak.
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1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

rutger kohler

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Re: positioning drain holes in new water pump
« Reply #2 on: July 31, 2012, 20:53:10 »
Thanks for that, it's what I thought but got confused with the two drain holes.
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1969 280 SL Manual gear shift
1972 280SE 3.5 auto
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