Caked on crusty in exhaust ports
#1
Caked on crusty in exhaust ports
swapping my engine over and notices only 2 of the 8 exhaust ports were what I think as normal, soot and still smooth. But few of them have caked on crap in them. Came off with a scrubby and and some brake cleaner, but what would cause this? The engine is super low mileage