2000 Chevy Suburban Smoke coming from under hood, engine wi

Tiny
89SIGO
  • MEMBER
  • 2000 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
My wife was driving the Suburban today; she got about a block from home and noticed smoke coming from under the hood. She turned around and drove it back home. The obvioul smell of something burnt under the hood is present. Upon inspection, I could not find any burnt cables. The serpentine belt is still in tact. When I turn the key to start the engine, it will not start as if someone was holding engine and not allowing it to crank. The engine torgues a bit but cannot turn over. It does not click like when the batter is low, so something is holding the engine back. This could be unrelated but something I have noticed, I have noticed a slight coolant smell over the past few months and have had to add a little coolant to the tank maybe once per month.
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Monday, October 12th, 2009 AT 11:37 PM

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Tiny
SERVICE WRITER
  • EXPERT
Just so I'm clear. You turn the key and NOTHING happens.

IF so, put a breaker bar on the crank shaft pulley nut and trying to turn the engine over by hand. If it doesn't move, pull the spark plugs out and crank over the engine.

IF coolant leaked internally, the engine mya be hydrolically locked, that is what I want you to check for if I understand your symptoms.
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Tuesday, October 13th, 2009 AT 6:18 AM
Tiny
89SIGO
  • MEMBER
When I turn on the ignition, the lights come on and accessories work. When I attempt to start the vehicle, the starter engages and attempts to turn over the engine but the engine will not turn over as if the engine were stuck. I think I need to remove the serpentine belt and then see if the engine turns over. Where is the tensioner pulley on this vehicle? Also, I did try to start the engine again this morning. The engine will turn over but very slowly and does not start.
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Tuesday, October 13th, 2009 AT 6:46 AM
Tiny
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  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/30961_belt_1.gif

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Tuesday, October 13th, 2009 AT 7:17 AM
Tiny
89SIGO
  • MEMBER
Today I removed the serpentine belt and all of the pulleys moved. Next I removed the belt to the A/C Compressor and that unit is seized. I put it all back together except for the A/C belt and my Suburban is back on the road. By the way, this seized A/C Compressor would not allow the engine to start; there was so much drag from the A/C belt that the engine could barely turn over.

Do I replace the A/C Compressor? I know there is some sort of a clutch on the front end of it, so not sure what the protocol is. Change the whole unit or just part of it.
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Tuesday, October 13th, 2009 AT 8:57 PM
Tiny
SERVICE WRITER
  • EXPERT
Much better than a seized engine.

IF you want to have the a/c work then get a new, not reman compressor. Should flush the lines and replace the dryer and oriface tube.
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Wednesday, October 14th, 2009 AT 5:27 PM

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