Engine, HVAC, Water Pump

Which bolts to Permatex on a 6.9 / 7.3 IDI Waterpump?

When you install a waterpump on a 6.9 or 7.3 IDI, you MUST use sealant on the top-two and bottom-two bolts.  Failure to seal these bolts can result in oil and coolant mixing.  See the image below for which bolts need permatex (blue), and also which bolts secure the waterpump and front plate, and their respective lengths.

 

 

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