Question

Technician A says that oil pan gaskets are often made of cork due to its ability to conform to small imperfections in the oil pan. Technician B says oil pan and valve cover gaskets are often MLS gaskets to account for the different expansion rates between components. Who is correct? a. Tec A b. Tec B c. Both A and b d. Neither A nor b.

Answer 1

Cork Gaskets
Cork gaskets create a positive seal that eliminates the need for retorquing, and the cork particles make the gasket easily compressible for a tight seal without leak paths. They can withstand high-vacuum and high-temperature conditions while maintaining compression. Choose extra-thick cork valve cover gaskets for increased valvetrain-to-cover clearance.

Steel/Multi-Layered Steel (MLS) Gaskets
Steel/Multi-Layered Steel (MLS) gaskets are designed to handle higher compression ratios, special cam timing, and higher operating temperatures, so they’re ideal if your engine is supercharged, turbocharged, or hooked up to nitrous oxide. The rigid steel design practically eliminates gasket distortion under grueling engine conditions. Some gaskets include a steel core for enhanced durability and blowout resistance.

So from the above both technician ate write and the material is depends on application for which it is used.