I have a 2002 5.4L Triton in my F150. I need to know which heater hose is the inlet to the heater core. Left or Right. Thanks

Asked by Localguy1964 Dec 16, 2015 at 11:54 AM about the 2002 Ford F-150 King Ranch SuperCab 4WD SB

Question type: General

I have a prestone flush kit and I need to install a tee in the inlet side heater
hose.I believe it's the left side , just want to be 100% sure.

1 Answer
74,710

OJ answered 9 years ago

Check both lines. There may be one with a cut-off valve on it which is vacuum driven. That should be the inlet.

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