Broken oil pump flange

[NVYMED]

MY 00 Boxster 2.7, manual

location : CA

Recently I tried to remove the oil pump housing, to fix a small oil leak....will in doing so, I broke off the rear facing flange that is attached to engine case. The flange broke off in the engine case just below the most peripheral facing O-ring. This has unfortunately happened to me twice, in two different motors. Does anybody have an idea how to remove this flange with the least amt of damage to the engine case? I've attached a few photos of the previous broken off flange that was easily removed by drilling a hole into flange, and removing with machine screw. Any help with this dilemma will be appreciated.

NVYMED

Edited July 13, 2010 by Loren
made images viewable here

[txhokie4life]

MY 00 Boxster 2.7, manual

location : CA

Recently I tried to remove the oil pump housing, to fix a small oil leak....will in doing so, I broke off the rear facing flange that is attached to engine case. The flange broke off in the engine case just below the most peripheral facing O-ring. This has unfortunately happened to me twice, in two different motors. Does anybody have an idea how to remove this flange with the least amt of damage to the engine case? I've attached a few photos of the previous broken off flange that was easily removed by drilling a hole into flange, and removing with machine screw. Any help with this dilemma will be appreciated.

NVYMED

I've done at least 6 of these successfully.

Patience seems to be the key. I use a little leverage and continual twist it back and forth and work the leverage

around all sides of the oil pump without putting any pressure on any of the machined surfaces.

some are easier than others -- and I'm sure as soon as I type this I will have one break on me :-)

Mike