Q: Roland, does the 2007 4.7 liter with the plastic intake manifold have coolant passing through to cool the manifold?
The teenage daughter ran my 2007 Jeep Commander hot. After inspection, I discovered coolant in almost every cylinder. After vacuuming all the coolant from the cylinders (approx. 1/2 cup of fluid total) A compression check on all cylinders shows no compression loss. this has me scratching my head as I was expecting blown head gaskets. A local mechanic suggested that the plastic intake manifold may have gotten warm enough to melt or warp allowing coolant to travel to all the cylinders and suggested replacing the intake manifold. I don't believe this plastic intake manifold even has coolant passing through it. Am I wrong and what do you suggest my next move should be? Thanks in advance for any help you may have to offer.
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