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Audi A6 4.2 Quattro Engine swap

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Audi A6 4.2 Quattro Engine swap

  #1  
Old 08-27-2018, 02:29 PM
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Default Audi A6 4.2 Quattro Engine swap

So I went through hell with my Audi A6 4.2 at a local mechanic shop. Sent it to the shop for a oil leak repair, came out with misfires on all cylinders, a hole in the radiator ..... Anyway, bought a used engine from a reputable local dealer, 6 month warranty. Had the engine swapped out, all good, great engine, more power than I remember, however, it's only been a few days and I am now experiencing a low rumble under the driver's side and have noticed the engine seems to be shifting at nonproper RPMS. Did my mechanic mis something huge or do I now need a new transmission?
 
  #2  
Old 08-28-2018, 02:29 PM
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Sorry to go back here but why was the engine replaced? How many miles on this engine and where was the oil leak?

What year is this A6 also?

Is the shifting banging gears? You state that it is shifting at nonproper rpms, what do you mean by that?
 
  #3  
Old 08-28-2018, 02:34 PM
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Engine was replaced because when I had a front motor oil leak repaired, I got the car back with awful misfires. Bad compression on all cylinders. There are 89K miles on this engine. This Audi is an 2006. The shifting is not banging gears, seems like the automatic shift, say on a highway doing 55-60, at 2500 rpms, you let up on the gas, the transmission continues to rev and then makes a sudden downshift. No banging, just seems like bad timing, not a smooth transition.
 
  #4  
Old 08-28-2018, 09:04 PM
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The throttle body may need to be calibrated. Any faults stored?

Before you dropped it off at the shop for oil leak repairs were there any misfires?
 
  #5  
Old 08-28-2018, 09:31 PM
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Throttle calibration ..... yes that does make sense. No, there were no misfires and I didnít have a hole in my radiator either. Shop was highly recommended, used them a few times for simple ignition coils, etc. am now looking for a great Audi mechanic in the CT area.
 
  #6  
Old 08-29-2018, 11:09 AM
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Did they pay for your new engine? Because it sounds like it may be there fault....
 
  #7  
Old 08-29-2018, 11:30 AM
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No. They did try to charge me $2000 for the repair of the oil leak and new radiator. I paid but pulled payment as soon as I got home. They did acknowledge that they knew about the misfiring when they test drove it, but thought best not to tell me. Anyway, water under the bridge. Now just gotta get this car right!
 
  #8  
Old 08-29-2018, 09:12 PM
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Wow....well sorry to hear that..... check and see if you have any stored faults and try to calibrate the throttle body with a VAG com and let us know. Good luck
 
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