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-   -   what are typical compression #'s? (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/86453-what-typical-compression-s.html)

ingalls71 03-11-2012 02:59 PM

what are typical compression #'s?
 
first numbers are first jump, second are final (bold)
first test(dry)-numbers were more sporadic, and i concluded that the cylinders were a bit dry, from sitting for so long.

left bank
cyl#1
150
200
cyl#2
125
175
cyl#3
150
200
cyl#4
155
210

right bank
cyl#5
145
200
cyl#6
110
145
cyl#7
115
150
cyl#8
125
160

these numbers obviously had me worried i had a bhg, so i retested with a few drip of oil in each cyl(wet).

left bank
cyl#1
145
190

cyl#2
145
185

cyl#3
175
220

cyl#4
150
210

right bank
cyl#5
150
210

cyl#6
135
190

cyl#7
145
190

cyl#8
145
190

im wanting to chalk up the somewhat of a large gap in psi between cylinders to just having different amounts of oil in them. just for reference though, what should my compression #'s be?

ingalls71 03-11-2012 03:01 PM

oh and the reason im doing this is because i am already doing ccv/valley pan, and obviously wanted to make sure i dont have a bhg.


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