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no,going 0.12 instead 0.10 can not cause that.
over here,we go 0.15 on intakes because they tend to tight.

did you go 12 o'clock or 1 o'clock position while adjusting valves?

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w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered