Are you having problems with your Subaru? Let our team of motoring experts keep you up to date with all of the latest Subaru issues & faults. We have gathered all of the most frequently asked questions and problems relating to the Subaru in one spot to help you decide if it's a smart buy.
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We checked with Subaru and were told that you should follow the manufacturer's recommendation for engine oil as specified in the owner's manual. Subaru also told us that 0W-20 engine oil is available in Australia and can be purchased through Subaru dealers. They also said that you could rest assured that although the engine will not be delivering maximum power, maximum torque, best fuel economy or best exhaust emissions, no harm will have come to the engine by using 10W-40 engine oil.
It might or it might go back to what the mechanic did or didn't do at the service, but there's no way to tell, so you're stuck with getting it fixed. Find a Subaru specialist and take it there if you have lost confidence in your mechanic.
Rear diffs on that model Forester are known to be a problem, even at low kays like yours, but it's important to make sure it's not a wheel bearing that's making the noise. Your mechanic should be able to identify it if it is a wheel bearing issue.
They are known to wear, but you need to have them properly assessed to confirm that the problem is with the diff. The prices quoted by the Subaru dealer would appear to be reasonable, and their diagnosis also seems reasonable, so I would be taking the car to them before I had a new diff fitted.
It's common practice to replace the water pump at the belt change, and not just on Subarus, as the water pump is usually found to be leaking when they take off the front cover and belt etc. By replacing it when the engine is pulled down for the belt change you won't have to do it again when the water pump finally fails. If you're not sure ask to see evidence the water pump needs replacing before the mechanic goes ahead and fits a new one. $400 is about right if it has to be replaced.
When Subaru updated the Transmission Control Module in 2010 it did what it thought was needed to fix the problem, but clearly they discovered later that the problem was with the torque converter. All of that suggests the company was being helpful in trying to fix the problem. Now they are offering you a new torque converter, leaving you to pay the cost of fitting it. That's a fairly standard deal with a car as old as your daughter and son-in-law's, and I would accept it.