M103 compression specs
08-16-2007, 02:02 PM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Not sure if MB published a range like they did for the four cylinders ( 147-176PSI ), but they indicate a minimum of 8.5 bar / 125PSI with a max variance between cylinders of 1.5 bar / 22.0PSI.
Prior to my turbo install we had 12.9 bar / 190 PSI with less then a 5 PSI variance betwen cylinders.
This was on a well maintained 1988 M103-12V with 63K miles.
