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Hyundai i30 2010: Knocking noise

Recently my 2010 Hyundai i30 started making a knocking noise. It was not overheating, not blowing smoke and was running perfectly until then. The Hyundai dealer said that because the spark plugs were not changed at 45,000 km or 3 year they would not repair it at their cost. The car has only done 38,363 km and they are estimating it will cost $2245 or possibly more to repair. They haven't popped a scope in to have a look, they've just taken the spark plugs out and said one is broken and that the head will need to come off. Your opinion would be appreciated.

It would seem that a part of a spark plug has dropped down into the engine and caused it to be damaged. If that's the case the only way to repair it is to take the head off and check to see what damage has been done. Once that has been established, and a cause worked out, you can then go forward with a plan to repair and negotiate with Hyundai about who pays the bill. I wouldn't recommend running the engine until the head comes off; if there are bits of a plug floating around inside the engine running it could cause more damage.

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