Keep replacing radiators.

Asked by Feb 28, 2017 at 08:32 PM about the 2000 Ford F-150 XLT 4WD Extended Cab SB

Question type: Maintenance & Repair

2000 F-150 4X4, 5.4L. 300k+ miles and I'm on Radiator #9!!! Used different
brands and all seem to start leaking at the tank seams about 3/4 of the way
down on the right side. No corrosion due to electrolysis. Each time the
radiator is replaced, new coolant and distilled water are added. System has
been pressure tested and no leaks, even at the heads. I have owned the
truck since it was new so I know it hasn't been wrecked. Techs are baffled
and so am I. Any ideas? Thanks in advance.   

2 Answers

74,375

Maybe too much pressure. Try a cap with a lower pressure rating or replace the one you have with a correct Ford brand cap. I am on my original 2003 F150 radiator with zero problems over 185,000 miles.

17,725

On my original 1998 F150 radiator. I wonder if your exhaust is leaking in the cooling system over pressurizing it.

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