Huztl MS440 oil pump mount screw stripped

[msmmce1]

Changing the leaking oil pump out on my Huztl MS440 when re-installing with very little torque the lower screw stripped...#$%#^$^&# is what i said! Anyone run into this? Wondering if I should go original size m4 helicoil or go up to m5 and just drill and tap??
Thanks!

 

[Adirondackstihl]

Gonna need to bottom tap that I believe because it’s a shallow blind hole.
Helicoils work okay in many instances.
That’s an M4 if memory serves right.
Not sure what I’d do there. Tough spot.