Compression check

[KKell83]

Due do all my e-mail tunes recently and multiple data logs I would like to do a compression check (leak down) on my 2011 gt. Do I need a custom adapter like the older 3v engines? What is an average compression for these engines, over 200?

Ken.

 

[5lho]

The car takes standard plugs so, no adapter needed. Compression varies depending on baro but about 180 is where things typically sit.

 

[KKell83]

The car takes standard plugs so, no adapter needed. Compression varies depending on baro but about 180 is where things typically sit.

Thanks!

 

[tennis_pr0]

When I did my compression test (dry test) my average was about 180. The lowest was 171 and the highest 187 with all the other right around 180. I was told my results were very good. This was in a fully warm engine.

 

[Blazer707@TBR]

Get the motor warm, disconnect the FDM in the trunk. Crank it until it wont start. Remove all plugs, put a battery charger on the battery and go one by one.

You want to see no more than 25% difference between hightest and lowest cylinder readings.

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[KKell83]

Get the motor warm, disconnect the FDM in the trunk. Crank it until it wont start. Remove all plugs, put a battery charger on the battery and go one by one.

You want to see no more than 25% difference between hightest and lowest cylinder readings.

Sent from my SM-G925P using Tapatalk

Thanks!

 

[Weather Man]

I disagree with the 25% number. 10% is the acceptable number that I have seen forever and used.

 

[crfrider16]

I disagree with the 25% number. 10% is the acceptable number that I have seen forever and used.

Yes, 25% is way too much. That would mean 180 and 135 would be within tolerance (obviously on the edge, but still).

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