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Re: TDI has a knock
I just came in from taking the head off. I found the # 4 piston top completely ate up and galled to the cylinder wall and head like a cap so when the piston came up to almost top dead center, it was hitting on it's melted material stuck to the head and wall. That's what the material was on the injector too. It looks like I will be taking the engine out. I wish I'd talked to the tow truck driver about how it sounded. The woman said it sounded good but the way it looks, it has had problems for a while.
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