In this Isuzu produced tech training video I have explaining the new 3.2L and 3.5L engines, at about 5:45 he explains how these engines are "free wheeling" and will not be damaged by a broken timing belt.
9:31, 16.3 MB, WMV file-
http://www.drivehq.com/file/df.aspx/publish/mgpa/techvids/engine.wmv
In the Isuzu TSB for timing belt replacement, when timing has been lost, the first thing you do is rotate the crankshaft to line up the mark and set #2 cylinder at TDC. Then you work on getting the camshafts rotated in place. Rotating the crank is just like the engine running. If it was an interference engine you could never do that without getting all the valves out of the way first.
I think it's safe to say this is a non-interference engine.
Mark
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