Crankcase (pcv) Problems of Nissan Pathfinder

The engine began to fail because of a lack of adequate breathability into the crankcase, causing high crankcase pressure, excessive oil blowby, severe exhaust smoke, severe engine sludge, severe engine shuddering, and lack of response to the power steering because of engine power loss. The failure of the pcv system was at fault. Produced codes p0300, p0306, and p0430. Engine sludge needed to be cleaned, pcv hoses and pcv needed to be replaced, spark plugs needed to be replaced because of blowby, and valve covers also needed to be replaced because of sludge clogging the pcv baffles within the valve covers.

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Pcv valve hose clogging rendering system useless and resulting in sludge buildup in engine. The sludge buildup causes issues with timing chain lubrication and ultimately destroys the guides causing excessive engine rattling, aluminum flakes in the engine. Causes loss of power, numerous different engine codes, and ultimately catastrophic failure of engine. Hise collapses within itself and prevents proper crankcase ventilation. See attached pictures.

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The contact owns a 2017 Nissan Pathfinder. The contact stated that upon starting the vehicle, the vehicle made abnormal loud sounds. Additionally, the check engine warning light was illuminated. The vehicle was taken to the dealer, where the cooling fan was replaced and the warning light was reset; however, the failure persisted. Additionally, the vehicle would only start after attempts. The vehicle was taken to the dealer, where it was diagnosed that the pcv hose collapsed and was applying significant pressure on the crankcase case, causing engine misfiring. The dealer replaced the pcv hose; however the check engine warning light remained illuminated. The vehicle was taken to the dealer, where the fractured exhaust clamps were replaced; however, the failure persisted. The dealer diagnosed that the cylinder 1 ignition coil may have failed. The dealer replaced the transmission fluid, coolant exchange kit and brake fluid. The engine control module (ecm) reprogramming was completed. The manufacturer was notified of the failure and referred the contact to the dealer. The vehicle was taken a second dealer, zeigler Nissan of gurnee (3175 grand Ave, lindenhurst, IL 60046), where it was diagnosed that the long block , exhaust manifold gasket, intake manifold, throttle body, the bank one (1) catalytic converter, and other unknown parts needed to be replaced. The manufacturer informed the contact that she would need to pay for the engine assembly replacement prior to them assisting with catalytic converter replacement. The vehicle was not repaired. The failure mileage was approximately 36,539.

The contact owns a 2005 Nissan Pathfinder. The contact stated that while driving approximate 40 mph, the vehicle stalled without warning. The vehicle was taken to the dealer where it was diagnosed that the camshaft sensor and the crank sensor needed to be replaced. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure and current mileage was 126,115.

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