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#1
06-25-2003, 05:11 PM
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Waterpump question?
I noticed that there is a small hole on the top of my waterpump housing. I am wondering if this is for lubricating the waterpump bearing? The other possibility is that someone put the outer housing on upside down and it is supposed to the a weep hole like other waterpumps have.
Any ideas? If oiling the bearing will prolong the life of the pump, I am all for it.
__________________
1982 300D Turbo "Helga" 380,000 miles 
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#2
06-25-2003, 06:15 PM
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Maybe it's a weephole where you can actually see it. A weephole at the bottom doesn't seem to make a lot of sense. But I'm not an expert in such things.
Sixto 95 S420 91 300SE 87 300SDL 83 300SD
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#3
06-25-2003, 07:36 PM
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I think that is designed for people who actually look at their engines regularly.. it will leak there before the water pump seal totally gives way.....
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#4
06-26-2003, 01:14 AM
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That small hole on the top of a waterpump housing is actually a weep hole (pee hole :-). Any worn water pump bearing will cause coolant to leak through this hole.
On older cars like W123/126 etc., the weep hole is on the top of a water pump while it's at the bottom on newer models (like C or E class). Eric
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#5
06-26-2003, 11:48 AM
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I actually believe this has been the topic of past discussion and the water pump is built with a weep hole in the top and the bottom. The water will leak out the bottom unless that hole is clogged. Jim
__________________
Own: 1986 Euro 190E 2.3-16 (291,000 miles), 1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000, 1988 300E 5-speed 252,000 miles, 1983 240D 4-speed, purchased w/136,000, now with 222,000 miles. 2009 ML320CDI Bluetec, 89,000 miles Owned: 1971 220D (250,000 miles plus, sold to father-in-law), 1975 240D (245,000 miles - died of body rot), 1991 350SD (176,560 miles, weakest Benz I have owned), 1999 C230 Sport (45,400 miles), 1982 240D (321,000 miles, put to sleep)
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