Leakdown and Compression Test done by Fdealer

I have posted previously about a 355 I have been stalking and the trials and tribulations of that effort are here

http://ferrarichat.com/forum/showthread.php?t=392049

In the continued search for an answer about this otherwise great car, Algar redid the tests for me and here are a couple videos of them being done in their garage by a 27 year F car mechanic. I thought that some might find the techniques and dialog regarding findings and other methods of performing leakdown tests illuminating.

Previously as posted earlier, the selling dealer had done leakdown tests and reported less than 10% on all cylinders at 100psi. I will post the short videos of that test as well.

The compression tests are in the first video and the leakdown is in the second. Some of the dialog is interesting

I don't want to create problems. I removed the links. The results are in the above thread and have been there for a couple weeks

I hope that maybe those looking to purchase may find this helpful.

 

Excuse me there dreamer, before you jump to erroneous conclusions I would think it would be appropriate for you to get your facts straight

Nothing was done surreptitiously at all. Yes they were aware I was filming it. No I did not ask permission to post the video on the Internet thus my retraction of it. I paid for the test, I own the service history and results of the test as the buyer gave me permission to have the test done. Showing the results of the test is no different than posting a picture of a warped dashboard on a vehicle for sale.

The folks at algar were extremely generous with their time, expertise and hospitality. I would not want to do anything to cross them. I will ask them if they have any problem with me sharing the videos publically or privately before doing so.

 

Yes that was an interesting observation and it makes a lot of sense. He didn't really offer a fix for that issue if it does exist other than a hard road ride which he did. That did improve the compression significantly but not completely. He didn't have anything positive to say about trying fuel additives either.

His comment was don't just take the car out of the garage and start it and let it warm up and think that's enough. He said, "take it for a ride to get a cup of coffee and go to the Dunkin Donuts 50 miles away." This car has had 1000 miles put on it in three years so I am sure their were some pretty long stretches of no activity in there. Or it could be something else valve wise also.

 

I would disagree with that statement in this case. If you look at the originals thread I started on this car and topic you will see the little printous that the f dealer provided me with. Those are the compression tests on each cylinder. In person or on the video you would see how they are generated. The hose is screwed into each spark plug hole and the engine is turned over 6-8 times. There is a clearly defined click on each stroke so watching the meter creating the graph and counting the clicks of the engine strokes it would be pretty hard to falsify the results

I'm on my phone here and can't upload images from this but I will post the last compression test card in the morning. It was pretty consistent with the second one done by the f dealer which is posted in the original threads

The video does have people in it with comments , etc. and if for no other reason but common courtesy it would be best that I have their permission to distribute it. I'll edit out some takes from it of just parts of the test alone so it can be seen how it was done. I'll post those in the morning

 

Here is the latest compression test. There is no "printout" for the leakdown but the results are in the videos. What you would see is a consistent relationship between these tests for each cylinder. One verifies the other.

In the video, you can hear the tech remarking that he can hear the air leaking from #4 if while it was pressurized.

He did stick a laproscopic scope in the cylinder but he didnt want to put the 90 degree attachment on it as it just slid on and was made of stainless and he was afraid of it coming loose and not being able to retrieve it. That would have been great we were able to see the valves, but that was a no go. I would have loved to do that on the good cylinders vs. this one and see what the difference was visually if possible.

I'll post some vignettes off the full videos later that are less "personal"
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