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water pump noise

  1. which one is idler pulley? big or small?

    Problems and Troubleshooting
    hello all, got some terrific advice once again from an older thread regarding a LOUD WHIRRING NOISE that I have, a diagnosis of a bad idler pulley seems to have hit the nail on the head, a poster offered the following advice... "Loosen the center bolt to the pully.....12mm I think. Use the...