In process of replacing injector and nut kit. It is a mess in there...must have been leaking for a long time and there is a lot of crusted up carbon and whatnot everywhere. Cleaning it up ad best as I can. Took poppets out and there is also a lot of this stuff in each of the six ports. Trying to carefully remove this but I know some in flaking off and falling into the portals. Can I spray something like Deep Creep in there to clean them out? Any ideas welcome. Thanks.