582 grey head

[garage monster]

I understand the water pump fix requires machining of the case. Is the so? What is the cost to have this update done? I ask as I am looking at a grey head.

[Av8r_Sed]

To install the blue head style ceramic rotary valve seal does require some machining. I had mine done a few years back when I had my grey head overhauled prior to first flight. I don't have an exact cost because it was included in the complete overhaul invoice. Any of the rotax repair centers should be able to quote a price for this.

Others have reported that this upgrade isn't necessary if care has been taken to run dex cool (silicate free anti-freeze) with distilled water. Telltale signs of leakage would be a milky appearance of the oil in the rotary valve reservoir.