My 380sl has plenty of power, but it frequently emits a puff of greyish white smoke on exit ramps after hwy driving. So I decided to do dry and wet compression tests to see whether the smoke may be caused by leaky valve stem seals or rings

The results of both tests, listed below, showed that the dry readings on the right cylinder bank were all higher than they were on the left bank, probably because that head had to be shaved when I did the valves app. 70k miles ago.

Cyl_Dry Wet

1 _160 _180

2 _160 _180

3 _160 _175

4 _160 _190

5 _180 _200

6 _175 _180

7 _180 _200

8 _185 _200


Considering that the difference between the wet test and dry test on most of the cylinders was near or slightly greater than the acceptable 10%, I was wondering if anything could be gained by doing a leak down test, other than to determine how much the rings in each cylinder are leaking.

Thanks very much in advance for your usually well-informed opinions