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Discussion Starter · #1 ·
hi, i have a 1987 audi 4000s and it is making a knocking noise under the hood , i read somewhere before that it was the knock sensor or some kind of rod that could be taken out, unfortunatley i cannot remember where i saw this, if anyone has an idea or any info, that would be great, thnx.
 

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i dont even think 87's came equipped with knock sensors.. its probably connecting rod knock. remove crank, reinstall new conn rods.. enjoy ;-) but if your going through all that trouble, you mine as well drop a 10v turbo in.. or research stroked 10v's.. since that requires removing crank/rods and install diff pistons.. 2.5L 10v anyone?
 
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