Owners of Polaris “big block” engines (700s, 800s and early 600s) should check the tension (tightness) of the hose clamp on the water pump...

Owners of Polaris “big block” engines (700s, 800s and early 600s) should check the tension (tightness) of the hose clamp on the water pump on a regular basis. This particular clamp is known to loosen, and should be tensioned to 30-35 inch-pounds. To prevent it from loosening, you can bend the hose clamp “tail” over the head of the clamp screw for extra protection.

Also, do not ignore the condition of the water pump drive belt. This belt can and does deteriorate over time, and should be replaced when it reaches a width of 0.250” or if it is cracked or damaged (new belt width is 0.345”) . Polaris suggests this belt should be inspected at 1500-mile intervals.

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