I just changed out my radiator and thermostat on my 1990 Ford Aerostar, 4.0L and mostly the job went very well. Just one question area:

1. Where the Transmission Lines go into the radiator they use a brass connector. The radiator box said not to tighten the brass connectors tighter than 10lbs torque. I did so. But both are slightly leaking tran fluid. Not a lot. I took them off and cleaned them and put them back in and same results. I seem to remember something about brass connectors will expand from the heat and probably seal in a short time. Any thoughts on this or how to correct?

Thanks,

John

 

I think I would use some teflon tape on them. That might be hitting the limit for the tape but I don't think it would hurt.

 

I read some on-line stuff and it said not to use teflon tape nor thread sealant on the transmission joins.

Thanks,

John'