HELP !!! -- blow-by and leak-down q?
07-15-2005, 09:29 PM
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HELP !!! -- blow-by and leak-down q? Hi,
If the engine has major blow-by... ie, when the oil-stick removed, it's a real cheminy.
My question is... would that be detected on a leak-down test ?
imho, it would be... and supposedly having a leak-down of under 10% for the worse cylinder doesn't add up...
What you guys think ?
Thanks,
If the engine has major blow-by... ie, when the oil-stick removed, it's a real cheminy.
My question is... would that be detected on a leak-down test ?
imho, it would be... and supposedly having a leak-down of under 10% for the worse cylinder doesn't add up...
What you guys think ?
Thanks,
07-15-2005, 09:38 PM
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Originally Posted by Eugenio_SS
Hi,
If the engine has major blow-by... ie, when the oil-stick removed, it's a real cheminy.
My question is... would that be detected on a leak-down test ?
imho, it would be... and supposedly having a leak-down of under 10% for the worse cylinder doesn't add up...
What you guys think ?
Thanks,
If the engine has major blow-by... ie, when the oil-stick removed, it's a real cheminy.
My question is... would that be detected on a leak-down test ?
imho, it would be... and supposedly having a leak-down of under 10% for the worse cylinder doesn't add up...
What you guys think ?
Thanks,
07-15-2005, 09:50 PM
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you know what, I'm not surprised at all.
The car is low on power for what it is... and when it was last tuned, there were a few pulls done with A/F higher than 18, and the guy would still rev the thing... added lots of fuel, brought it down to 14, and the added more fuel to a decent A/F, but engine only makes 420rwhp
I don't recall engine smoking before that tune... is it possible it got dammaged on the dyno/tuning ?
Getting that checked by professionals.
The car is low on power for what it is... and when it was last tuned, there were a few pulls done with A/F higher than 18, and the guy would still rev the thing... added lots of fuel, brought it down to 14, and the added more fuel to a decent A/F, but engine only makes 420rwhp
I don't recall engine smoking before that tune... is it possible it got dammaged on the dyno/tuning ?
Getting that checked by professionals.
07-15-2005, 09:55 PM
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Originally Posted by Eugenio_SS
you know what, I'm not surprised at all.
The car is low on power for what it is... and when it was last tuned, there were a few pulls done with A/F higher than 18, and the guy would still rev the thing... added lots of fuel, brought it down to 14, and the added more fuel to a decent A/F, but engine only makes 420rwhp
I don't recall engine smoking before that tune... is it possible it got dammaged on the dyno/tuning ?
Getting that checked by professionals.
The car is low on power for what it is... and when it was last tuned, there were a few pulls done with A/F higher than 18, and the guy would still rev the thing... added lots of fuel, brought it down to 14, and the added more fuel to a decent A/F, but engine only makes 420rwhp
I don't recall engine smoking before that tune... is it possible it got dammaged on the dyno/tuning ?
Getting that checked by professionals.
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07-15-2005, 10:10 PM
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but if that is the case... would it be possible the leak-down to be under 10% for each cylinder, as I was told... while the engine has that much blow-by.
07-15-2005, 10:24 PM
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Originally Posted by Eugenio_SS
but if that is the case... would it be possible the leak-down to be under 10% for each cylinder, as I was told... while the engine has that much blow-by.
07-15-2005, 10:32 PM
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Originally Posted by closet red neck
Well, I was told that the cylinder with the bad ring will show the most loss in compression. The leak down is to find the bad cylinder. Sure, if you pumped up that dead cylinder with air, lets say this cylinder to be under 10%. The other cylinders might be 3%. The one that yeilds the most percentage is most likely to be the bad cylinder. I'm not trying to insult your intelligence. I hope I'm understanding you correctly....LOL. I want to help you if I can!!!! I don't know...I'm just guessing!!!!!
Now what I'm thinking is that I was BS-ed when told those #s.
Anyways, I'm having my engine checked by another shop to confirm the information I got... I can't stand BS and lies.
07-15-2005, 10:48 PM
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Originally Posted by Eugenio_SS
from what I understand stock ls1 will leakdown @ somewhere around 18% (I think)... so if the worse is 10%... that means it's in excellent condition and there is no leak whatsoever.
Now what I'm thinking is that I was BS-ed when told those #s.
Anyways, I'm having my engine checked by another shop to confirm the information I got... I can't stand BS and lies.
Now what I'm thinking is that I was BS-ed when told those #s.
Anyways, I'm having my engine checked by another shop to confirm the information I got... I can't stand BS and lies.
Man, I've always heard that anything over 10 or 12 % is a bad thing...But that might be in the old school racing motors!!!LOL!! I maybe wrong with this ls1 thing. 