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Subaru Engine Common Problems

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The following information may give you some understanding of what you may be experiencing with your Subaru engine.
With extensive hands-on rebuilding experience of the Subaru engine, we are able to post the most common causes of Subaru engine failure. It is apparent that most Subaru EJ25 Forester, EJ25 Liberty, EJ25 Outback and EJ25 Impreza models at one time or another will experience external leaky head gaskets. The most common call that we receive is about “head gasket leak repair cost.” A revised Subaru head gasket is introduced into our rebuilding practices, which prove successful to putting a stop to this annoying problem. Second-hand engines normally all have the same leaky head gaskets, so we recommend repairing your existing Subaru engine.
The Subaru EJ255 and EJ257 engines commonly fail due to engine oil usage/consumption. When we dismantle engines either purchased from Subaru wreckers or engines of our customers, we find that the top of the pistons are heavily coated with carbon; this carbon is not normally from combustion but from excessive oil usage. This effect impacts engine compression ratio and promotes engine detonation causing the piston ring lands to break or the crankshaft to spin a bearing. With our Subaru reconditioned engine or rebuilt engine in Sydney, we are able to take the appropriate measures to reduce this problem.
The earlier model 99-00 WRX engine has been very reliable, the most common issues we see today are components that are worn out due to age and distance travelled. Corrosion of the cooling system also impacts allot of the metal piping throughout the cooling system. Our Subaru spares section of the business can provide replacement for most of these parts.
The 2001-2005 model WRX engines tend to start having problems when engine gaskets start to fail. We see many of the earlier engines running bearings due to oil starvation. Another problem is fuel shortage due to aging fuel pumps; this leads to engine damage with lean air/fuel ratios.
Evaporative and crankcase engine hoses start to break down with age and require replacement each time upon rebuilding the earlier WRX engines. Our Subaru spares can also help you with this request.

The following information may give you some understanding of what you may be experiencing with your Subaru EZ30 & EZ36 engine.
As with some of the other turbo engine, oil consumption still tends to carry over to these engines.
Of recent, the 2004, 2005, 2006 Subaru outback engines are showing problems with leaky head gaskets. We find that cooling system restrictions are responsible for this cause. With an engine repair and the cooling system addressed, these engines go on to serve well.
The EZ30 and EZ36 rebuilt engines are totally different to overhaul. The EZ30 is more time consuming due to the intermediate timing case. Generally, after the EZ30 engine has travelled more than 200,000km, it will normally require timing chains and timing chain guides when rebuilding these engines. Failing to do this, will cause DTC error codes of over advancing or cylinder misfire due to excessive phasing of the camshafts owing to stretched timing chains.
We renew all of these components when needed on our Subaru rebuilt engines to ensure trouble free running.

The following information may give you some understanding of what you may be experiencing with your Subaru FA, FB engines.
These engines are the latest Subaru engines developed by “FHI” Fuji Heavy Industries, looking into the next decade.
The most common problems seen with these engines are engine gasket leaks from the cam box and timing case. Oil consumption on some model Foresters, Liberty and Impreza’s is of concern with consumption considered unacceptable by most customers
Broken pistons on some DIT models was seen due to misfire/ engine tuning; this was resolved with factory engine software updates.
Engine noise, especially when cold is another common complaint.
Our rebuilt Subaru engines address a lot of the above concerns with internal changes to improve combustion sealing and tighter clearances especially in the crankshaft area dramatically reduces oil consumption and engine noise.