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660 grizzly coolant bypass head tube repair

DJRANCH

By DJRANCH
in Yamaha ATV Forum

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DJRANCH Newbie

DJRANCH

Posted
Posted

I made the mistake of using the ICE coolant in my unit and it rotted out the head fittings. Using cheap Harbor Freight air drill made the repair a snap without tearing down the motor.Make sure you go slow tapping the head, the pipe tap is a wedge and only do a couple of turns at a time. Going back to regular Green 50/50 antifreeze.

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Mech Grand Master

Mech

Posted
Posted

Yeah it pays to use the coolant recommended by the manufacturer. They know what metals and materials are in your engine, and even how the castings were made makes a difference.

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