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<\/a><\/figure>\n\n\n\nI think the noise source has shown itself. According to an AI search result this type of problem will cause the sound I have between 1500 and 2200 rpm.<\/p>\n\n\n\n Fan and water pump pulley off and I’m going to try and replace the harmonic dampener without and taking the hood off or the rad out. We’ll how that goes. I expect to be using lighted mirrors to see what I’m doing!<\/p>\n\n\n\n The impact wrench is perfect for removing crank bolts when you can’t hold the engine from rotating.<\/p>\n\n\n\n <\/p>\n\n\n\n Pulley’s off. Had to get at the bolts by feel. Not too hard and there are only three of them. Also the crank didn’t turn when I took them off.<\/p>\n\n\n\n A three arm puller in place to pull off the old dampener.<\/p>\n\n\n\n With the pulley off it was easy to see where the outer ring had moved forward by at least 1\/16″<\/p>\n\n\n\n The proper balancer installation tool was a real asset in getting it on with the engine in the car. It needs a 1-1\\16″ very deep socket to use a ratchet. Not being a professional I don’t have e such a socket. I had to use a long wrench that I could only move about 1\/3 of a turn each time. Took a bit but the dampener finally seated itself.<\/p>\n\n\n\n It was a bit of fun getting the pulley bolts on , but at least I was able to torque them and the engine didn’t rotate. Not so with the crank bolt so I snugged it up and then used a couple of short bursts with the impact wrench to set it firmly in place. I also used lots of blue thread lock and a shake-proof washer.<\/p>\n\n\n\n All back together and I’m happy to say the vibration appears to be gone. I’ll only be totally sure after a test drive – if the rain will only stop!<\/p>\n\n\n\n Next: Hopefully I can now enjoy the final break in trips and then on into the last of the driving season \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":" I got the Chevy jacked up and went under to check the dampener and flex plate. Couldn’t find anything wrong with the flexplate, but happened to notice a slight misalignment between the inner and outer rings on the dampener. The outer ring appeared to have moved forward on one side.\u00a0 So I checked on line … <\/p>\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n