I bought a new after market radiator at Advanced Auto Parts for my 98 Expedition 5.4 L 4x4
The upper tranny coolant line fitting started leaking quite a bit. I torqued them down a little tighter, but no improvement.
I took them apart to inspect and all looks good, however at a glance, it looks as if the flange of the tranny line is not wide enough or deep enough to seat against the o-ring, plus it feels as if I am bottoming the flared end of the line side against the seat of the radiator fitting when tightening and after secondary inspection, I can see a slight polished line where it was metal to metal contact (flared end to fitting seat).
My question is, in this instance is there possibly an o-ring sizing issue, incompatable factory line flare to aftermarket fitting, or could it be as simple as the fitting requires a thread sealant like a pipe dope or teflon?
The upper tranny coolant line fitting started leaking quite a bit. I torqued them down a little tighter, but no improvement.
I took them apart to inspect and all looks good, however at a glance, it looks as if the flange of the tranny line is not wide enough or deep enough to seat against the o-ring, plus it feels as if I am bottoming the flared end of the line side against the seat of the radiator fitting when tightening and after secondary inspection, I can see a slight polished line where it was metal to metal contact (flared end to fitting seat).
My question is, in this instance is there possibly an o-ring sizing issue, incompatable factory line flare to aftermarket fitting, or could it be as simple as the fitting requires a thread sealant like a pipe dope or teflon?