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Compression/leak down numbers

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Old Aug 5, 2015 | 06:09 PM
  #16  
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if you're saying its not burning oil, therefore I assume its not blowing smoke, then just do some checks like seeing if theres metal in your oil, another cmpression test or even do it yourself. If the power is still strong then keep it monitored and enjoy your ride, dont think you need to pull it down as soon as the comp lowers until you start to get signs that its effecting the car
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Old Sep 18, 2015 | 01:49 PM
  #17  
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At 3100 miles since last oil change. Getting it changed out tomorrow. Lost a little oil between 3100 miles ago and now, but very little, still very close to the top hash on the dipstick. Question for those familiar with buschur catch cans. Since they put the oil back into the pan, could that be why I am not losing oil? Could it be that without the catch can, I would be losing a lot, consistent with my test numbers in the first post?
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Old Sep 18, 2015 | 02:59 PM
  #18  
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Originally Posted by pistons4550
At 3100 miles since last oil change. Getting it changed out tomorrow. Lost a little oil between 3100 miles ago and now, but very little, still very close to the top hash on the dipstick. Question for those familiar with buschur catch cans. Since they put the oil back into the pan, could that be why I am not losing oil? Could it be that without the catch can, I would be losing a lot, consistent with my test numbers in the first post?
Yes. It's going back into the pan instead of the intake and burning off.
Less smoke, too, I'd assume?
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Old Sep 18, 2015 | 05:12 PM
  #19  
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Rent a compression tester from autozone and redo the test. This will be just to double check. I have seen a compression tester be off. Better to have your own verified numbers.
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Old Sep 19, 2015 | 07:23 AM
  #20  
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Originally Posted by kaj
Yes. It's going back into the pan instead of the intake and burning off.
Less smoke, too, I'd assume?
So there's no way to know how much I am losing without changing my catch can setup?
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Old Sep 19, 2015 | 02:17 PM
  #21  
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Originally Posted by pistons4550
So there's no way to know how much I am losing without changing my catch can setup?
Can you plug the return line?

Last edited by kaj; Sep 19, 2015 at 02:20 PM.
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Old Sep 19, 2015 | 03:15 PM
  #22  
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I would just go to a different shop and redo the comp and leak down tests. Like I said before, It would not run very well with those high leak down numbers and huge variances in compression. It would idle quite rough because the vastly different condition of each cylinder will require different amounts of fuel, but the ECU just averages what all 4 need because there is only one O2 sensor for AFR feedback in closed loop, and thats what all 4 get.


So, like I said, get the tests redone.
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