Engine cover balanced isolated support and seal

摘要

A sealed cover, such as an engine valve or rocker cover, is mounted on an engine with balanced grommets which support the cover through equal compression loads on inner and outer sides of the cover. A sealing surface of the cover is positioned with a fixed gap from a facing sealing surface of a cylinder head or other engine component. The gap is sealed by a liquid RTV seal material that is vulcanized in place at room temperature after installation of the cover. The arrangement separates the function of noise isolation from the sealing function performed by the RTV material so that the specifications of the sealing material and the noise isolating grommet material can be varied as desired to perform their separate functions without a change in one affecting the other.