GDI engine carbon build up on intake valves

Old 10-25-18, 12:57 AM
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GDI engine carbon build up on intake valves

So I've been doing some research and wanted to get some opinions here, too.
My VW Scirocco R is at 60,000 km. I've owned it since 53,000 km. I don't know if the previous owner has ever used Seafoam or CRC GDI intake valve cleaner before.

I heard that it might be risky or dangerous for turbocharged engines because if some of the carbon chunks break off and get into the turbocharger or cylinders in the engine, it could possibly do some damage? Any heard of this before or can verify that is true?

I thought maybe the carbon build up would become soft after the application and leaving it on for an hour before driving it at highways speeds.

I am debating whether to do the walnut sandblasting option (pricier at about $600-700) and play it safe or try the seafoam/crc product?
Old 10-27-18, 08:03 AM
ukrbyk's Avatar
Join Date: Mar 2010
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Reason it builds up is because gas never goes onto intake valves. Surprise. hence, any additives to gas do exactly that - nothing.
Question is - do you HAVE build up? Before you do Schwarzenegger type heart surgery. And pay for it.
Of course you could:

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