Always use OEM parts – here is an example of severe damages due to a counterfeit valve!
A malfunction of a counterfeit valve can result in a failure with severe consequential damages. Below picture shows a cylinder head which was damaged by a failed counterfeit valve on a four-stroke engine.
If one valve cone breaks and drops down into the combustion chamber, it can hammer through the piston crown, thus possibly damage the cylinder head including other valve cones, injection valve, and cylinder liner. In addition to this, it is possible that metal parts from the damaged valve cones can pass through the exhaust duct to the turbocharger and lead to a total loss of the turbocharger rotor.
Reported by MAN PrimeServ
28 Oct '17, 18:31