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Message: <blockquote data-quote="CPB" data-source="post: 28395" data-attributes="member: 12360">[ATTACH=full]5837[/ATTACH]Tried this a few weeks ago. That's a broken extractor.Took it to a local exhaust shop and they said, "You can't get those out!" I nodded in obvious agreement gesturing towards the broken extractor. They pointed me towards someone that could weld on the cast iron, since my goal was just a block off. That ended up as a dead end. Fortunately these manifolds are $110 brand new from any parts store. Bought and installed a dorman exhaust manifold and called it a day.The intake ports and valves were very grimy when I had the intake manifold off for knock sensor replacement. I could visually see where the injectors were doing some cleaning, but the engine was still crapping in it's mouth due to EGR. Now that it's deleted I'll revisit walnut blasting the ports/valves.</blockquote>