Yes lots of manaifolds have coolant passages in which anti freeze
passes through......


I currently have a 1997 GMC with 350 and its always leaked or should
I say used anti freeze......starting about the time the warranty went
out..Too costly for replacement but the way I understand it I am not a
lone individual with a GM plastic manifold coolant leak either. Mine
best I can tell is not in or around a cylinder, and its going out ther
exhaust which I hear is what most cracked GM manifolds on the 350
does........true or not I don;lt know, but no signs of leaking coolant
externall, none in oil.....

On Sat, 21 Jan 2006 16:20:56 -0500, Bob Engelhardt
wrote:
Jeff Wisnia wrote:

... cracked (or maybe just
warped) plastic intake manifold ...
... wouldn't even crank
because of hydraulic lock from the antifreeze in one or more cylinders.
...

Antifreeze is circulated in the *manifold*?

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