i just want to be sure that i understand this, (cams arn't cheap). what do them mean by counter pressure in this instance. i know what it means in the terms of high school physics. but ya, could i get an explanation

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Current
2006 E320 CDI, 57K bought at 67K "Liesl"
1986 190E 2.3-16, 198K bought at 56K "Brigitta"
1987 300TD (Chuggin Along), 292K "Friedrich"
1995 E320 Wagon, 200K "Louisa"

Past
1987 300SDL, (sold) 125K, bought for 1$ "Kurt"