10/28/2023 0 Comments Rattle can vw busEngines fitted with hydraulic lifters are commonly referred to as "hydraulic valve engines”, but it is actually just the lifter that is hydraulic. The same exact lifter used in the 1978 Bus is used in all Vanagons, both air and water-cooled waterboxer engines. The difference between an engine with adjustable valves and non-adjustable valves is in the valve "lifter," which is also referred to as a "tappet" or "cam follower." So, VW added hydraulic lifters to the VW Bus beginning with the 1978 model. In 1977, however, VW decided that it was time to join the 20th century and added an automatically adjusting valve system to the VW Bus. Up to and including the 1977 model, all VWs required regularly scheduled valve adjustments. Welcome to another quirky (and common) Vanagon experience. Q: What the heck is that noise? When I parked my Vanagon two days ago, it was running as quiet as a (loud and very large) mouse.
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