Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

Engine Noise

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  #11  
Old 12-06-2010, 03:28 PM
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if you have vacuum gauge you can or do this test


I don’t have a gauge, but I suspect I don’t have good vacuum. What do I do?
A real quick check of your vacuum system, which can be done at any time, is checking your waste gate actuator.

With the engine at idle, locate the turbo, and the can on the side that has the arm in it, should be drawn up inside. Pull on it, to see if you can pull it out. If you can, you don’t have sufficient vacuum. That is not to say that the pump is bad, but just an indicator that you vacuum level to the turbo portion is not enough. You will need to do further troubleshooting to determine what’s wrong. If it doesn't move then you most likely have enough vacuum at the wastegate.


if you need more info just let me know
 
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  #12  
Old 12-06-2010, 03:34 PM
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here some more info

So how do I know if my vacuum pump is working correctly?
You will need a vacuum gauge to properly test the pump itself. You will want to hook the gauge up as close to the pump as possible. You want to see at least 20”+ Hg of vacuum at Idle.

Do I have to hook directly up to the vacuum pump?
It is best if you do, however, you can test farther out on the on the vacuum system. You can check the vacuum at the soleniods, EGR, wastegate. This will help you determine if it is a bad device or a bad vacuum line if the vacuum pump tests good.
*Note: Testing after the solenoids may give a skewed reading as they regulate the amount of vacuum given to the devices.

My vacuum level is not very good?
If you are directly attached the gauge to the pump, and you have low or no vacuum, then your pump is bad. If testing further out on the system, you will need to connect directly to the pump to insure that you have no leaks in the lines between the gauge and the pump.

Are leaks common?
Very common. Leaks come from chaffing, hardened plastic lines cracking, etc... Sometimes the vacuum level may be okay, but if the engine rocks one side to another, it may open up a crack in the line and you will lose vacuum.

---AutoMerged DoublePost---

here place get vacuum

RockAuto Parts Catalog

it is listed under brakes/wheel hubs have no clue listed there
 

Last edited by Crazy; 12-06-2010 at 03:34 PM. Reason: Automerged Doublepost
  #13  
Old 12-06-2010, 04:10 PM
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listen to this^^^^ guy he has the info
 
  #14  
Old 12-06-2010, 04:30 PM
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i appriciate everything guys I'll take a look at that and see what I come up with and let you know.
 
  #15  
Old 12-13-2010, 07:58 AM
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I was able to pull it out but it took some force, is that normal.
 
  #16  
Old 12-13-2010, 10:16 AM
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what took some force the pulley
 
  #17  
Old 12-13-2010, 10:27 AM
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Sorry should have wrote more, when I pulled on the arm from the turbo, it took a little force to get it to move, is that good or bad
 
  #18  
Old 12-13-2010, 10:31 AM
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ok you talking about rod on wast gate no should not be able to move if truck running so if it took lot force i say you are good and mean lot force
 
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