Either the cap is cracked, which you will need a new one from the dealer. Or you forgot the o ring when installing the new filter
Remove the old filter. Replace it with a new filter. Before installing the new filter wipe the mounting surface clean and apply a coat of oil to the new oil filter's gasket. Spin on the filter and tighten it 3/4 turn after it makes contact with the mounting surface. No, more and no less. If you still see oil leaking from the filter then look above the filter for the leak. Possibly valve cover is leaking.
If water is leaking from the cabin air filter on a Buick Century then the seal must be replaced. Replacing the seal requires removing the glove box to reach the cabin filter. Once done, the seal can safely be replaced.
It depends on why it is leaking.
The only permanent repair for a leaking water pump is to replace it. Any product that claims to stop the leak is only a temporary emergency repair that will not last and will partially clog your cooling system. Repair it the right way by replacing the pump.
Most stop leak additives do nothing but empty your wallet. Replace the gasket that is leaking.
Hard starts and under powered may stall at stop lights.
how do you stop oil leaking from a 2000 sportster primary cover
it is going to depend on where it is leaking from
From 2003 to 2006 they stop putting cabin filters and fuel filters.
Stop leak is a temporary fix. I don't recommend it. Tighten the clamps on the hoses going into the raditor.
No.
Replace seals