Question about 2004 BMW 120i Automatic
Most engines run hydraulic tappets. Thes bleed down and allow a tappet problem when started until oil pressure buils up and takes up the slack. Comes from incorrect oil filter that doe's have a nonreturn valve in it ( el cheapo) low oil pressure , incorrect grade of oil and worh hydraulic lifters/ tappets. Some you can do but the lifters will have to tested for bleed down time at a dealer
Posted on Jan 10, 2013
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Posted on Jan 02, 2017
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