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Leak Down Test- Whats Acceptable
#312344
05/08/09 11:55 PM
05/08/09 11:55 PM
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Joined: Jun 2006
Posts: 5,159
CT
GTX MATT
OP
master
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OP
master
Joined: Jun 2006
Posts: 5,159
CT
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What do you guys think is acceptable leakage when running a leak down test?
I've also had people tell me its fine to do it cold. Im not so sure I believe that. Whats the general opinion on that?
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Leak Down Test- Whats Acceptable
[Re: Dart 340]
#312346
05/09/09 12:19 PM
05/09/09 12:19 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
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master
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Az
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From what I can remember, it was a woopping 20% for street engines.
Fastest 300
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Re: Leak Down Test- Whats Acceptable
[Re: Dart 340]
#312348
05/09/09 02:39 PM
05/09/09 02:39 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
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master
Joined: Oct 2003
Posts: 7,506
Az
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I'm sure things have changed, but I believe that was a Ford spec from around 1979 80. Max acceptable varation between cylinders. You basically have to decide what is acceptable for you and your intended use. There really is no "correct" #.
Fastest 300
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Re: Leak Down Test- Whats Acceptable
[Re: Crizila]
#312349
05/09/09 06:36 PM
05/09/09 06:36 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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Anything beyond 15% to me is suspect, unless it's a high milage engine. Fresh engine with std type rings seated on the right bore finish will be between 5-8%, zero gap or gapless type rings should be less than 3%. Is that the 383?
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Leak Down Test- Whats Acceptable
[Re: moper]
#312350
05/09/09 06:37 PM
05/09/09 06:37 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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And BTW, should be done hot.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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