It's part #1 under the coolant return pipe #215 that comes from the bottom of the rad that sits on block 'B'. However, the entire intake sits right on top of that location. So, the whole intake has to come off just to replace the thermostat. It's a big job.
http://forum.planetisuzoo.com/viewtopic.php?f=17&t=59001&p=504732
Mark







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