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Message: <blockquote data-quote="ctandc" data-source="post: 1585155" data-attributes="member: 30345">The original issue with the 4.6 intake was the all plastic coolant crossover. The "Solution" was for Ford to have one of it's suppliers modify the front of the intake to accept a bolted on aluminum coolant crossover.Problem solved. Right?Well you've still got plastic in direct contact with coolant and now in contact with metal on both sides.  Add in age and heat cycles. Ever had a 4.6 with a hint of sweet coolant smell when it's at operating temp, but no visible coolant leaks?[ATTACH=full]48819[/ATTACH]This is very common with the later PI intake. So for those who want to get a 'good condition' used intake? Good luck. This engine had less than 100K on it. Age and heat cycles.</blockquote>