Leak down test on 550

I recently had a complete service done on my '99 550 maranello. It included the timing belts (at 24,100 miles), and a leak down test was performed as well at my request. I do understand the concept that the gauge shows the loss percentage which indicates the condition of the cylinder and overall condition of the engine. The less the “loss” percentage the better the condition the engine is in.

Based on the individual readings I got, I have the following questions:

1) In general, the findings show a loss percentage below 10% which indicates that my engine is in great to good running condition.
--> Is that a correct statement ?

2) In particular, there appear to be great variances between the single readings.
- cyl. # 1, 2, 3, 6, 8:____9%
- cyl. # 4:____________7%
- cyl. # 5, 9:__________4%
- cyl. # 7:____________5%
- cyl. # 10, 11:________11%
- cyl. # 12:____________8%
There is a great inconsistency (high to low) in leakage of 63% between cylinders 10, 11 and cylinders 5 and 9.
--> Anything to be concerned about ?

3) Let’s assume that the above variances are of no consequence, it looks like cyl # 10 and 11 (both over 10%) are going to create a problem sooner than later.
--> Is that a fair assumption ?

4) Based on the above, would anyone be able to give me an opinion as to the condition of my engine (i.e. rings, valves, and head gasket) ?

Thanks.

 

Wanna buy ???

 

Not selling. Just trying to get some tech info ;-)

 

Performed @ cold. No word on "leakage" as it passed without comments.

Wanna get really technical ?
Does the following comparison entice you to a comment?

--> Leak Down (comparison @ cold) <--

March 2015..................November 2011
@24,158 miles.............@13,063 miles

- cyl. # 1:____9%.........10%
- cyl. # 2:____9%.........10%
- cyl. # 3:____9%.........10%
- cyl. # 4:____8%.........10%
- cyl. # 5:____4%.........6%
- cyl. # 6:____9%.........7%
- cyl. # 7:____5%.........5%
- cyl. # 8:____9%.........4%
- cyl. # 9:____4%.........11%
- cyl. # 10:__11%.........12%
- cyl. # 11:__11%.........10%
- cyl. # 12: ___8%.........11%

 

Thank you for your time and your encouraging words. I will (I do) enjoy every driving moment.