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Oil pump
https://ausmini.com/forums/viewtopic.php?f=5&t=28317		 Page 1 of 1
Author:  jbeenz [ Tue Feb 20, 2007 8:48 am ]
Post subject:  Oil pump
Oh sod!
it has just been brought to my attention, (thanks minicranks), that i cannot fit a star drive pump to my 998 without a 1/4 inch spacer.
however, having pulled a few old pumps apart, i have discovered that the drive "rod" is the same leingth on a 1300 star drive as the a+ drive 998 pump that came out of the motor, and these press out nice and easy.

Now,
can i get a new a-plus drive pump, and press the drive out, and replace it with a star drive one?
thus removing the need for a spacer :D
or is this a silly idea that will end up in a broken oil pump and an even more broken engine?
Author:  simon k [ Tue Feb 20, 2007 9:06 am ]
Post subject: 
sounds like a spacer would be safer.... you're talking about spacing it away from the engine, right?
Author:  jbeenz [ Tue Feb 20, 2007 9:17 am ]
Post subject: 
yes, the oil pump area on the 1275 engine is shallower that the smallbore one, i.e the hole is bigger on the 998, and the pump is bigger.
Author:  drmini in aust [ Tue Feb 20, 2007 7:22 pm ]
Post subject: 
we did that years ago with the `concentric' brand S pin drive pumps but the newer Minispares ones are not just keyed and press fitted, I think they are knurled on or something..

If buying new pumps you can use a slot drive one, and weld a slotted plug into the back of the star drive cam.
GR has done lots like this.
:wink:
Author:  jbeenz [ Tue Feb 20, 2007 7:33 pm ]
Post subject: 
ah ok, that answers it then :D it workes quite well on the old pump i tried it on :D
at last it proves im not insane :lol:

minor rethink required i think!
cheers
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