waterpump replacement & lubrication

[perry113]

Hello fellow forum members.

I am in the process of replacing the waterpump on my 1965 230SL and see that there are 2 holes in the new waterpump housing. My thought is to tap and tread one of the holes and install a grease fitting for lubrication. The old pump is a replacment pump and does not have a fitting nor any threads for one to be installed. Looks like it was never serviced.

Am I on the right track doing this??

My shop manual says the pump requires lubrication every 12000 miles but does not specify the type grease/oil to be used. My thinking is to use a grease fitting and use the same type of grease used for servicing the front end. Or should I carefully insert motor oil or marvel mystery oil into the top insertion hole.

Your feedback and knowledge is greatly appreciated.

Peter Perry
Albany NY
pperry444@juno.com

[gnj588d]

Mine is a 65 car and the correct oil for the water pump is hypoid gear oil as in the back axle it has a level plug in the side and a filler plug in the top,both are hexagon bolts.Good luck, Mike

[Naj ✝︎]

Hello Peter,
If your new water pump does not have these two plugs then it will have sealed bearings and does not need lubrication:


Download Attachment: 230wp04.JPG
38.65 KB

naj

68 280SL

[perry113]

Naj.
Thanks for your reply. I think you solved my question. Mine is a later style unit. Pictures will not upload.

My thought is now that one of the 2 holes is weep hole to allow fluid to drip if the pump fails. The other hole is for???

Thanks in advance.
Peter Perry

[Shvegel]

Weeping when it's upside down?

Sorry, couldn't resist.