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Old 02-06-2021, 01:45 PM   #1
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What are these holes in the cylinder head near the exhaust ports

I did search and found nothing... I mean the ones in the channel in this picture, there are six small ones and one larger one.



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Old 02-06-2021, 01:54 PM   #2
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That is how your SAI gets air into the exhaust ports, often found totally blocked by carbon build up.
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Old 02-06-2021, 03:40 PM   #3
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Thanks... I had to lookup SAI... Secondary Air Injection.
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Old 02-14-2021, 08:48 PM   #4
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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
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Old 02-15-2021, 05:04 PM   #5
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Or get an ROW flash and ditch the SAI system altogether.

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