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Can you use and oil additive to stop bearing knock in a Subaru Forester Sti Sf5 engine?
Wiki User
∙ 13y ago
How do you know that you have a bearing knock? If the engine is under warranty you should promptly take it back to the dealer.
If it is truly a bearing knocking you are living on borrowed time. Mine makes noise on cold mornings only and I understand the noise is from "piston slap" due to parts shrinking in extremely cold weather. It is not particularly harmful, just annoying.
That said, most commercial engine additives that you find on the shelf at Wal Mart or your auto parts store will do no harm when used as directed. Pick one and give it a try.
Wiki User
∙ 13y ago
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