Polaris · Canada · Crit
Polaris Sportsman XP 850: Engine
Affects Polaris Sportsman XP 850 · 2009 — about 2K vehicles.
The hazard
On certain ATVs, operated in sub-freezing temperatures, for repeated short-run periods of time, excess moisture may collect and freeze in the outlet port of the crankcase ventilation valve assembly. If this occurs, a restriction of crankcase ventilation to the air box could cause an increase of crankcase pressure leading to valve cover gasket displacement and engine oil leakage. Should an oil leak at the valve cover occur, oil could contact the exhaust header pipe and create a fire hazard, which could result in property damage, personal injury or death. Correction: Dealers will install a crankcase breather kit.
What to do
Contact your dealer; the remedy details were not included in the filing.