Which SUBARU engines are interference? What SUBARU engines are non-interference?

June 10, 2011. Author:

Here is a table listing SUBARU engines, models, and years and which SUBARU engines are interference and which are non-interference.

This table refers to USDM (United States Domestic Market) SUBARU's. 

YearSUBARU enginesStatus
<1990SUBARU engines were basically all non-interference 
1990SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1991SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1992SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1993SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1994SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1995SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1996SUBARU engines 1.8L EJ18 and 2.2L EJ22non-interference
1996SUBARU engine 2.5L DOHC phase Iinterference (valve to valve)
1997SUBARU engines 2.2L and 2.5L DOHC phase Iinterference
1998SUBARU engines  2.2L and 2.5L DOHC phase Iinterference
1999SUBARU engines  2.2L and 2.5L DOHC phase Iinterference
1999SUBARU engines  2.5L SOHC phase II (Forester)interference
2000SUBARU engines  2.5L SOHC phase IIinterference
2001SUBARU engines  2.5L SOHC phase II and H6 3.0L EZ30interference
2002SUBARU engines  2.5L SOHC phase II and H6 3.0L EZ30interference
2003SUBARU engines  2.5L SOHC phase II and H6 3.0L EZ30interference
2004SUBARU engines  2.5L SOHC phase II and H6 3.0L EZ30interference
2005SUBARU engines allinterference
2006SUBARU engines allinterference
2007SUBARU engines allinterference
2008SUBARU engines allinterference
2009SUBARU engines allinterference
2010SUBARU engines allinterference
2011SUBARU engines allinterference

The SUBARU engine interference/non-interference chart above is available for download as an Excel 2007 spreadsheet here: SUBARU-engines-interference.xlsx

SUBARU engines interference and non-interference chartIf the table/chart of SUBARU interference and SUBARU non-interference engines does not display properly in your browser, you can view the SUBARU interference/non-inteference engines list it as an image here.

This table aims to be as accurate as possible, but there are no guarantees.  Especially around model change years - sometimes in model change years early models of that year get some of the previous year's parts.

The SUBARU H6 6-cylinder 3.0L EZ30 engine is shown in the list above.  It has a timing chain with no set replacement interval; it is intended to last the lifetime of the engine.

Every SUBARU owner should know if their SUBARU's engines are interference or non-interference.  If the timing belt or timing chain breaks or jumps timing, it can cause bent valves and possibly dinged pistons in the engine, thus resulting in expensive repairs.

If you have a question or comment, or would like a specific engine added to the list, please post below, or visit the SUBARU forum.

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