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Car Forum / Chevrolet / Chevrolet Trucks / September 2004help with a roaring noise
I was wondering if I could get some help here. I have a 1997 Chevy Silverado extended cab with a 350, automatic transmission, 140,000 miles. When I go down the road it is making a roaring noise underneath. When I let off of the gas it goes away, but comes back as soon as I accelerate again. I didn't notice any other problems or noises leading up to this, it was sort of an all of a sudden thing. I would greatly appreciate any help anyone can give. Thanks in advance, Mike thermostatically controlled fan has locked up wit hengine off, try to turn the fan by hand, if it doesn't turn, that's it > I was wondering if I could get some help here. I have a 1997 Chevy Silverado > extended cab with a 350, automatic transmission, 140,000 miles. When I go [quoted text clipped - 3 lines] > all of a sudden thing. I would greatly appreciate any help anyone can give. > Thanks in advance, Mike The fan seems to be working fine. I left out another datail. Sometimes when I put it in gear it makes a loud knock noise. I was told it might be a bad universal joint, I'm no expert, but they seem O.K. > thermostatically controlled fan has locked up > [quoted text clipped - 10 lines] > give. > > Thanks in advance, Mike Hello Mike, As TranSurgeon has pointed out, it most probably is your pulley driven engine cooling fan (if you have it installed). With the engine off and cold, the fan should turn freely by hand; with the engine off and hot, the fan should have some resistance. If the engine is cold and you have some resistance, 'tis the silicone-filled fan clutch. The "roaring noise" is what gives it away. Good luck Franko > The fan seems to be working fine. I left out another datail. Sometimes when > I put it in gear it makes a loud knock noise. I was told it might be a bad [quoted text clipped - 17 lines] > > give. > > > Thanks in advance, Mike > Hello Mike, > [quoted text clipped - 6 lines] > > Franko If it was the fan, it would roar at a dead stop in neutral if he revved the engine. Hint:) Al >> The fan seems to be working fine. I left out another datail. Sometimes > when [quoted text clipped - 24 lines] >> > give. >> > > Thanks in advance, Mike Grab a drive shaft and see if you can make it clunk, that may be what you hear when you put it in gear. It basically should have very little lash (movement) and if anything you'll hear the teeth in the differential knocking together lightly. As for the roaring: it's your fan. GMC Gremlin > The fan seems to be working fine. I left out another datail. Sometimes when > I put it in gear it makes a loud knock noise. I was told it might be a bad [quoted text clipped - 17 lines] > > give. > > > Thanks in advance, Mike is it a exhaust leak? > I was wondering if I could get some help here. I have a 1997 Chevy Silverado > extended cab with a 350, automatic transmission, 140,000 miles. When I go [quoted text clipped - 3 lines] > all of a sudden thing. I would greatly appreciate any help anyone can give. > Thanks in advance, Mike Thanks, I didn't think of that. I had dual exhaust installed about two years ago and I have noticed that one of the brackets were a little loose a few weeks ago. I'll check that tomorrow. > is it a exhaust leak? > [quoted text clipped - 8 lines] > give. > > Thanks in advance, Mike Carrier bearing in driveline?  Signature** FREE Fishing Lures ** Weekly drawing ** Public Fishing and Boating Forums ** www.YumaBassMan.com > I was wondering if I could get some help here. I have a 1997 Chevy Silverado > extended cab with a 350, automatic transmission, 140,000 miles. When I go [quoted text clipped - 3 lines] > all of a sudden thing. I would greatly appreciate any help anyone can give. > Thanks in advance, Mike Congratulations for you, unfortunate for me. You got it right, I found out the hard way, when it finally gave out on the way to a friend's house to see if he could help me out. It left me stranded on the side of the road. Thanks for everyone's help. Mike > Carrier bearing in driveline? > [quoted text clipped - 14 lines] > give. > > Thanks in advance, Mike |
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