When installing a synthetic rubber gasket, which statement is true?

The correct statement is that the gasket must be installed against a clean surface. This is crucial because a clean surface ensures proper adhesion and sealing of the gasket, which prevents leaks and ensures that the gasket performs its intended function effectively. Residues, dirt, or old gasket material can interfere with the sealing properties of the new gasket, leading to improper sealing and possible fluid leaks in the future.

A clean installation surface also allows for even distribution of pressure across the gasket when the components are bolted together, reducing the risk of the gasket becoming pinched or distorted, which could compromise its integrity. This principle is vital in maintaining the performance and longevity of engine seals and gaskets.

While other statements may touch on relevant practices, they do not prioritize the fundamental requirement of cleanliness, which is essential for achieving a proper seal.