You should never replace a pan if there is no defect such as,leak,crack,major dents ect. If its not leaking you should leave it alone!
You need to replace the oil seal.
You do not have many choices either replace it or if the leak is not sufficient buy one of those leak fix bottles.
Find where the leak is and replace the hoses or gaskets which are the culpret.
There are some oil additives you can get, that might stop the leak. But if the leak has developed, the only way to fix it is to replace the seal.
Shampoo the engine to clean it. Check for leaks in a day or so depending on how bad the leak is. Replace the component causing the leak. If you still can't find the leak you can put dye in the engine oil and look for the leak with a black light.
If I remember correctly it may be the fuel filter. but if it is the line it is easy to replace .
I have a leak on my drive shaft left front 2000 cheve Blazer I would like to replace the whole unit
you will need a conversion kit to use r-134a refrigerant (i belive) but if it has lost refrigerant suddenbly then it likely sprung a leak somewhere have it tested and the leak repaired before recharging it.
replace the hose
Replace the drink tube assembly
You can find a small vacuum leak in your 2002 Toyota Camry with a diagnostic tester. The diagnostic tester can pinpoint virtually any vacuum leak.
by the lower intake manifold while you are doing this you should replace the intake manifold gasket anyway because it will leak sooner or later.