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Guest Message by DevFuse

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Interference or non-interference: How do I know which engine type that I have?

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5 replies to this topic

#1 Vanguard


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Posted 16 November 2005 - 04:01 PM

'92 Subaru Legacy L AWD wagon non-turbo
I think it's a 2.2L engine

I had this info a few years ago but those brain cells have died since then. Which type of engine do I have? And for when I forget again, is there someplace for lookup online where I can check again? I can add it to my Favorites so it won't matter if I forget where is the site. Is it true the interference engines for Subaru starting showing up in '95 or '97 models (so mine would be exempt and be non-interference)?

#2 Legacy777



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Posted 16 November 2005 - 04:02 PM

You have a 2.2 liter engine. It is non-interference.

#3 idosubaru


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Posted 16 November 2005 - 04:07 PM

interference 2.2 liter motors started in 97. anything prior is non-interference, including all 1.8 and 2.7 liter motors as well. there are on-line resources but dont' know that i'd trust them, sometimes they are convoluted. dealer or here is your best bet to find out.

#4 Snowman


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Posted 16 November 2005 - 05:32 PM

Austin told me a simple method for determining this: If the spark plugs are oriented at an angle to the heads, it is non-interference. If the plugs come straight out from the top of the head, it is interference.

#5 Vanguard


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Posted 16 November 2005 - 06:52 PM

Thanks for the info, especially about the spark plugs which I'll be replacing next weekend so I'll see if they are angled or not.

#6 edrach


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Posted 16 November 2005 - 07:04 PM

Unfortunately, the sparkplug trick does not work for determining which engine you have. Your '92 2.2L is definitely a non-interference and the interference engine did not start until the '97 model year. I have a '97 Impreza with the 2.2L engine and it is most likely interference even though it has a manufacture date of Oct. '96. Do a search on non-interference; this was discussed ad nauseum about 3 months ago here. Here's one link; there are others.


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