Leakdown Test

[johnj123]

Recent leakdown test and here are my numbers:

Cyl 1 - 99%
Cyl 2 - 99%
Cyl 3 - 99%
Cyl 4 - 92%
Cyl 5 - 92%
Cyl 6 - 99%

Should I be worried about Cyl 4 & 5?

Thanks,
John

[haycait911]

with those #'s 4 and 5 are your best cylinders! leakdown number's are usually expressed in percentage of leakage. ie:
1-1%
2-1%
3-1%
4-8%
5-8%
6-1%
as far as those two cylinders I wouldn't worry yet. drive it for a bit then re-do the test. these engines are quite variable with these things. I usually look for a trend over two or three tests before getting concerned. did you check to see where the leakage was coming from on 4 & 5?

[johnj123]

Thanks.... I should have listed the numbers as:

1-1%
2-1%
3-1%
4-8%
5-8%
6-1%

Did not check where the leakage was coming from. This is the second time the leakdown test was conducted over the past couple of years. I was told that the numbers were fine and the car is running great!!! Just wanted to hear from this group.

Thanks,
John

[dshepp806]

What were your previous #'s? And, were they done by the same shop?

Best,

[johnj123]

Numbers from the first test:

Cyl 1 - 1%
Cyl 2 - 1%
Cyl 3 - 1%
Cyl 4 - 10%
Cyl 5 - 10%
Cyl 6 - 1%

Test were conducted over a year time frame.

Thanks,
John