82 F-250 XLT Lariet 351 Windsor 2 wheel drive. Leaking antifreeze. Not from radiator and not all the time. See it from the passenger side of the truck. The radiator cap and thermostat have been replaced. No water in oil or vice versa. Any ideas?

 

Hit up the auto parts store that loans out tools and get a radiator psi tester.
Its like a small bike tire pump hooked to a radiator cap with a gauge.
You top up the radiator, check what psi your cap is and pump it up till the gauge reads the same.
Then start looking on that side of the motor for where the leak is coming from.

Check the heater hoses motor to heater box, side of head & block for leaking freeze plugs (most likely).
Cant think of anything else it could be but you need to put psi to the system to find it.
Dave ----

 

thank you will do.

 

x2

You can narrow your search by checking the passenger's floor board. If the passenger's side carpet is damp, or your defroster blows a film of antifreeze onto your windshield you have a bad heater core / heater core connections.

Here's the kind of kit you should be able to rent from the auto parts store: