I have an 86 4Runner with a 22re and auto tranny. When the heat is on I can smell a hint of anti freeze but when its off there is nothing. I am not getting any king of puddling or visible leaks in the cab or in the engine compartment. Any ideas where it could be coming from?

 

sounds like a pinhole leak from the heater core

 

Thats kinda what I figured but I was hoping it may be somthing else. Is it worth buying a new one or is a used one ok to use?

 

not sure on this truck. do a search or maybe someone else will chime in. I know a lot of the aftermarket heater cores on vehicles are not well regarded compared to the oem.