|
I think valve covers causing vacuum leaks is only true of cars that use an oil separator that has vacuum pulled on it. On the M117 in my 350SL as well as my M102 in my 190E 2.0 the crankcase vent goes straight to the air cleaner and is effectively venting at atmospheric pressure, not under vacuum.
That article more than likely doesn't apply to your M116.
To answer you question otherwise, yes they can be somewhat significant I've seen people over tighten BMW valve covers which are plastic, crack them, and see a vacuum leak.
__________________
68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500
Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i
|