Injector Sleeve Block Cleaning

jojo

New member
Dec 12, 2013
65
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Southern California
LB7 310K

I'm replacing injectors on my truck and felt like resealing/cleaning the sleeves that are in the heads. Does anyone know how clean these areas needs to be where the sleeve tapers and where the tip area is. It looks like there is a good amount of carbon build up right after it tapers and I wondering if it would be allright to install the sleeves with just that amount of carbon left in the bore.