FB 25 engine - Subaru Forester Owners Forum
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post #1 of 4 (permalink) Old 05-30-2019, 04:04 PM Thread Starter
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FB 25 engine

Is this engine an interfearance engine

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post #2 of 4 (permalink) Old 05-30-2019, 04:40 PM
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@Michael laterveer yes.

The Google custom forum search is pretty good. Take a look at my search results for: forester interference engine Scroll down to the search results.

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['07 FSXT MODding Journal] ['03 X MODding Journal]

'07 FSXT - COBB Surgeline dyno stock Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport
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post #3 of 4 (permalink) Old 05-30-2019, 05:54 PM
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Originally Posted by Michael laterveer View Post
Is this engine an interfearance engine
Dictionary definition of “Interfearance” - Anxiety about valves tangling with pistons

(I’ll get my coat....)
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post #4 of 4 (permalink) Old 05-30-2019, 07:26 PM
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FB engine doesn't have a timing belt so Interference is not as big a concern. If the timing chain goes it doesn't really matter if it's an interference engine you are having a really bad day at that point.
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  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Engine and Exhaust > FB25 - 2.5L Non-Turbo (2011- 2018)

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