Quote:
Originally Posted by fredochini
'02 4.0l SOHC, I had a coolant leak around 130k miles that didn't show on a pressure test. The issue was the plastic intake manifold needed to be replaced. Of course now, a metal one is available.
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The SOHC 4.0 does not have coolant through the intake plenum, are you confusing the intake for something else perhaps? The thermostat housing is a trouble area, could it have been that?