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[nikos1400]

One of the downsides of direct injected motors is carbon buildup. Over time carbon builds up on the intake valves cluttering them up and having a detrimental effect on an engine's performance. Oil and fuel essentially gets on there and this creates a circular problem of more and more oil and fuel clinging to the deposits and the thickness of the deposits around the valves increases.

This car had 69800 miles on it and did not have any aggressive modifications only a rear section exhaust and filter.

Valves before the cleaning:




ενδιαφερον !