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This valve cover breather assembly is a variation of the popular Metco MBR0001 breather.
This unit replaces the original oil fill tube found on the driver's side of the factory valve cover of the 1986-1987 Buick Regal turbo. This particular model is unique in that the machining of the base incorporates additional steps to allow the installed filter to be level, much like the factory oil fill cap the unit replaces.
Like all Metco breathers, the base is CNC-machined from billet aluminum for precise fit, and the included silicone O-ring (not shown)is specially designed to prevent oil seepage at the base of the breather.
The filter base is microfinished for surface protection and good looks, and is easily hand-polished to a mirror-like appearance.
The removable filter element is a high-quality re-usable unit from S & B Filters, and it is securely retained in the filter base by the specially-machined retention groove at the top of the base.
The purpose of this valve cover breather is to vent unwanted accumulation of pressure in the crankcase, and to provide maximum circulation of ambient air in the crankcase to reduce oil temperatures.
The installation of this breather will contribute to increased engine oil life and reduce the possibility of failed engine seals resulting from excessive crankcase pressure.
This breather will reduce the effectiveness of the vehicle's PCV system, and it is not emissions-legal.
Note: This breather is also available in a push-in style for aftermarket valve covers. Please see part number MBR0014, listed elsewhere in this section.