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Problem Reported: Intake Manifold May Crack Leaking Coolant Behind the Alternator
May 27, 2010, 11:08 AM
<p>The 1996-2001 Mercury Grand Marquis with a 100% plastic <a href="/intake-manifold">intake manifold</a>&nbsp; is known for engine overheating, even with normal use, and a coolant leak from the front of the manifold. This will often trigger the <a href="/check-engine-light">check engine light</a> and <a href="/low-coolant-level-warning-light">low engine coolant warning light</a>.</p> <p>The engine coolant leak is from a factory defect, which causes cracking on the front coolant passage of the intake manifold. In a very short time, this leak will lead to engine overheating issues, especially while the vehicle is idling. &nbsp;&nbsp;</p> <p>Between 1999 and 2001, Ford released an updated version of this engine, known as the 'PI' version with a metal coolant passage on the front of the intake manifold, to prevent future issues.</p> <p>There is no factory authorized repair for the intake manifold, and replacement is required to correct the engine coolant leak and overheating issues.</p> <p>&nbsp;</p>
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