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Old 09-21-2019, 12:30 AM   #50
Scooby Newbie
Member#: 493470
Join Date: Nov 2018
2019 STI
Crystal White Pearl


Originally Posted by WRXnick16 View Post

The post doesn't even state what type of engine it is in the picture..

Where did anyone in this thread say that the WRX's FA20DIT wasn't susceptible to carbon build-up? Everyone has agreed on that for years and acknowledges that it requires maintenance..

How many miles were on that car? What type of engine was it? Did the carbon build-up make it "unreliable"?

Notice the tops of the valve heads themselves are actually pretty clean. Here are some examples of severe carbon build-up that will impact idle, fuel economy, etc.

So yeah.. the valves that "TheShopCT" posted actually aren't that bad.
If the new STI will be susceptible to gunk like this on the valves at any point in itís life....Subaru can keep it.
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