CAPS Autowerkz Pte Ltd on Instagram: "🚗𝐇𝐲𝐮𝐧𝐝𝐚𝐢 𝐄𝐥𝐚𝐧𝐭𝐫𝐚 - 𝗪𝗮𝗹𝗻𝘂𝘁 𝗕𝗹𝗮𝘀𝘁𝗶𝗻𝗴🚗 𝙒𝙝𝙖𝙩 𝙞𝙨 𝙒𝙖𝙡𝙣𝙪𝙩 𝘽𝙡𝙖𝙨𝙩𝙞𝙣𝙜? Walnut blasting is a cleaning process used mainly for modern direct-injection engines to remove carbon buildup from the intake valves and intake ports. 𝑯𝒐𝒘 𝒊𝒕 𝒘𝒐𝒓𝒌𝒔? ~Crushed walnut shells are blasted at high pressure into the intake ports. ~Walnut shells are tough enough to remove carbon deposits but soft enough not to damage metal parts.