leaking rear main engine seal on 1HZ engine

Dougie, minor oil leaks can go away but usually do not. It's not a difficult job in a proper workshop. Four hours plus $50 for parts and he will probably want to do an oil change. Wait untill that needs to be done. Mal Try.

Dougie,
Oil leaks from gaskets and the like do not go away (normally) but oil leaks from seals such as the rear main and front timing cover do.
The seals are subject to changes in temperatures and most of the time the go away.
I had three vehicles now where the same thing has happened and on all three the leak have gone away by itself.
To repair the rear main oil seal the mechanic needs to remove the gearbox (it is right in between)...
You may have just come across a good trustworthy mechanic...
Trust him and come back to him if the leak persists....
Also check all the engine breathers for blockages...
Will

I have the same problem on my 75 troopy (170k kms). It is not dripping - more a film at this point. I do not think it will go away as it will be leaking because it is worn, so temperature and state of the oil, viscosity might affect how much it leaks, not whether it leaks. I will be having it replaced before the oil contaminates anything else such as rubber gearbox mounts, clutch etc. I am monitoring it only until my next oil change. Besides, my Toyota dealer needs the money.....apparently

Jon