986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - What are these holes in the cylinder head near the exhaust ports

Gelbster · 02-14-2021, 07:48 PM

Suggest you clean out the carbon from the ports. Having full-flow is essential to the functioning of the SAI system. If they restrict flow you'll get a CEL code that will cause you to fail Smog and it will be a real pia to diagnose and repair

02-14-2021, 07:48 PM	#4
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,027	Suggest you clean out the carbon from the ports. Having full-flow is essential to the functioning of the SAI system. If they restrict flow you'll get a CEL code that will cause you to fail Smog and it will be a real pia to diagnose and repair