Mustang 1650RT Oil In Intake and Turbo Air Filter
Fault Codes & Symptoms
Engine & Power Related symptoms: - Loss of engine power - Blue or white smoke from exhaust - Increased oil consumption - Engine blow-by The customer reported loss of power and intermittent blue smoke from the exhaust, especially under load.
Confirmed cause: Excessive crankcase pressure was forcing oil vapor through the crankcase ventilation system into the intake, saturating the air filter and contaminating the intake piping. The root cause was determined to be worn piston rings. Repair performed: The engine was removed for a complete overhaul, including new pistons, rings, and cylinder liners. The crankcase ventilation system components were cleaned and inspected before reinstallation. The turbocharger and intake piping were cleaned of all oil residue, and a new engine air filter was installed. Verification: After reassembly, the engine started and ran smoothly. Crankcase pressure was re-tested and found to be within the manufacturer's specification. A test operation under load confirmed that power was restored and there was no further blue smoke from the exhaust. Technician notes: - This scenario highlights how a symptom pointing to one component (turbocharger) can be caused by another system entirely (engine base mechanical). - Measuring crankcase pressure is a critical step when oil is found in the intake and should be performed before condemning an expensive component like a turbocharger. - Always clean the charge air cooler when oil contamination of the intake is found.