Oil pump

[WS6]

Oil pump- HELP!

Not being familiar with Buick's external pump and mine being one of the sources of leaks, I need to take it off and see what's up. So what are the do's and don'ts of this style pump. Any shortcuts? what about the coolant hoses. Do I take them off first? And does the pump come off as one unit to service it on the bench? How is it driven and what should I be careful of falling out?

 

[WS6]

Re: Oil pump- HELP

Okay, so I get into this can of worms today and I remove one piece at a time. First the filter(duh) then the pressure switch, then the oil cooler and adaptor( as one unit). Now when I get the adaptor and cooler on the bench to break that assembly down I notice the adaptor has a chunk out of it, albeit a small chunk, a chunk none the less. See pics....

Now, this isn't the first time this things been off and I suspect by the tool marks on everything it's been off twice at least. Or severely manhandled once. If you see the O-ring you'll see why it was leaking pretty good too.
My questions are these;
1, Do I even worry about it missing this peice?
2, If so, is this TTA specific?
3, Where can I get one?


Next question; I've left the pump cover on as it looks like a pain in the A$$ to get off. Should I go ahead and take it off too? And what's in store for me to fall out on the floor and roll into the drain:crazy: . I origianlly suspected the pump cover to front cover gasket was leaking, but now that I see this O-ring I think this is the leak.
The leak doesn't seem to have been going on for more than a couple thousand miles and if that's the case that's about when the previous owner put a timing chain and gears in. I suspect that it was not taken off properly at that time and that's how the chunk came off.


Thoughts anyone??



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