Join Date: May 2009
Location: east coast
Car: OBW H6 VDC, Tribeca, XT6
Feedback Score: 1 reviews
You have bad bearings and need a new block or rebuild.
the turbo's have some fairly specific issues that you should probably read about. they "require" synthetic oil, so if it was ever run in it's history without synthetic that may increase the risk of future lubrication related issues (which would mean lower end bearings and knocking).
Subaru has a specific turbo-only mention on their documentation about running synthetic oil only. i have it copied and pasted below.
i know people that do Subaru work, own shops and recommend not buying the EJ25 Turbo motors unless there is documentation that it has been run on synthetic at proper change intervals it's entire life. all this to say - it's likely it had compromised lubrication at some point and you're now seeing the repercussions.
Here is Subaru's official language on the matter:
Subaru Turbo care and maintenance requirements.
Turbos require careful maintenance.
April 25, 2008. l 'Proper lubrication of the turbocharger requires high-quality engine oil. Some do not provide enough lubrication performance or durability when used in turbocharged engines. Using poor-quality oil or oil not designed for turbo engines may cause damage to the turbocharger and other engine components. Consequently, it is critical to follow Subaru vehicle owner’s and service manuals for recommended oil grade and viscosity.
A second key component of the lubrication system is the oil filter. The Subaru Genuine Oil Filter, available at your Subaru dealer, is the only filter that Subaru has tested to meet requirements for filtration and flow. Aftermarket oil filters may have different filtration performance and relief-valve opening pressure, which could affect filter and engine performance. Subaru Genuine Oil Filters help ensure optimum engine and turbocharger performance.
Due to heat generated by the turbocharger and carbon deposits contained in exhaust gas, the oil in a turbocharged engine will deteriorate faster than the oil in a naturally aspirated engine. Therefore, special care should be taken to use proper grade oil and to monitor oil deterioration.
Under normal driving conditions, the recommended oil and oil filter change interval for turbo vehicles is every 3,750 miles or four months, whichever comes first.
However, for vehicles driven in conditions beyond normal, such as racing conditions, the oil and oil filter may require more frequent changing.
Racing-type engine stress doesn’t only occur on the track. Racing-type driving occurs when the drivetrain, suspension, and other vehicle components are used at near peak capacity. Any driving where the engine speed is kept high – either by using lower gears at higher speeds or using engine braking – is considered racing-type driving.
Important: A “track day” or autocross event requires an oil and oil filter change immediately before and immediately after the event. Make sure to check other engine fluid levels as well.
Engine Oil Level
Check the oil dipstick periodically to make sure the oil level is within proper range in order to keep the turbocharger properly lubricated and cooled. More frequent level checks are necessary especially when utilizing engine braking, because this increases the engine’s demand for lubrication.
Important: Allowing the engine oil level to drop by more than one quart may cause oil starvation, oil pump cavitation, and bearing damage. Over time, this cumulative damage will cause turbocharger and engine failure.
Carbon deposits produced by a turbocharged engine can accumulate at the bottom of the oil pan. When changing the oil, always drain the oil through the oil drain plug hole on the oil pan.
A vacuum draining device could leave carbon deposits at the bottom of the oil pan and potentially contaminate the new oil.
Turbocharged Subaru engines are designed to operate on premium unleaded (91-octane AKI or higher) gasoline. This is essential for maximizing performance and is required to prevent possible engine damage.
1. Do not rev the engine or accelerate past half throttle immediately after start-up. Oil requires time to heat up for full flow, and high-rpm driving with a cold engine can damage the turbocharger.
2. After highway driving or high-load driving, Subaru recommends allowing the engine to cool by idling for at least 30 seconds before shutting off.
Engine modifications such as, but not limited to, adding a boost pressure controller, using a non-genuine aftermarket air intake or exhaust system, changing the air bypass valve, “chipping,” etc., may negatively affect the warranty. Your Subaru dealer offers a line of Subaru Performance Tuning parts, which are designed and tested to Subaru standards and do not void the warranty.'
H6 OBW VDC, H6 OB Sedan, Tribeca, Lifted XT6