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CB500 leaky oil pump

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Johnwebley:
I am getting annoying oil drips from the oil pump housing,

 I have replaced the main pump to crankcase joint "O" ring,also the smaller 2 "O" rings on the studs,

but I am unable to unscrew the 3 phillips headed end plate screws,and this is the one thats leaking,I believe,


  my local bike shop also can't remove them,

any ideas?


 these damn drips are really annoying,

 

matthewmosse:
Only time I saw a leak it was the oil pressure switch, and trying to tweak it up a bit tighter caused a drip to become a gushing leak. I geuss you could try drilling the 3 phillips head screws out and replacing them with new, I seem to recall they are countersunk type - I find these tend to bind up solid far more than other bolts and often need the heads drilling off at which point they normally wind out with mole grips.

mike the bike:
Have you got an impact driver / do you need to borrow one?

hairygit:
I agree with Matthew, drilling the heads off and the remainder of the screw normally winds out easily. Personally I wouldn't risk using an impact driver on an oil pump, too much risk of damaging part of it!

Sent from my X5 using Tapatalk

Bryanj:
Ive used impact driver lots on these screws but if the top is chewed up drill the heads off carefully, I would start with a 4mm drill in the centre to try and get the heads off then with the cover removed you should be able to get the remainder out with molegrips.

The cover O ring is not listed but the size is listed on here and a Gold Wing part is the correct size, or at least it worked on the ones i did. From memory the part number is 91305-216-000 46 x 2 91305-426-003 gets the same size

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