Parts specialist febi has highlighted the quality and coverage of its range of rocker covers and the critical role these components play in protecting the engine. 

Rocker covers (or valve covers) prevent debris and small particles entering the engine, while also sealing in the lubricating oil, making them vital for effective engine operation. Traditionally these where made from a cast alloy, but now are frequently manufactured from a reinforced plastic which incorporates additional functions, such as sound insulation, fixing points for additional pipes, hoses and wiring. In many cases, it also incorporates the engine positive crankcase ventilation valve (PCV). This valve is an essential function of the vehicle’s emission control strategy to direct hydrocarbons from the engine into the induction system.

The originally used polyamide material ages under the influence of constant engine heating, cooling cycles and vibration. As a result, the rocker cover can distort or crack, leading to oil leaks. This ageing process can lead to cracks in areas of the cover which are often located at positions in the engine compartment that are very difficult to diagnose. A common failure area is around the spark plug or injector locating points, which leads to combustion failure due to the part being saturated in engine oil.

Excess exhaust emissions and the incorrect running of the engine are other reasons why the rocker cover might have to be replaced. This occurs where the PCV is an essential part of the cover itself. Typically, the valve diaphragm fails due to poor oil quality, fuel ingress, short distance driving cycles or cracks in the housing. Consequently, the diaphragm cannot be replaced separately.

febi’s rocker covers are made from high quality reinforced polyamide plastic, which are ready to install and come complete with a gasket and fixing screws (where necessary). If the cover has a PCV fitted, the diaphragm is made from fluorosilicone rubber, which is resistant to oil and fuel and can operate over a vast temperature range.

When replacing a rocker cover, febi recommends ensuring that the mating surfaces are clean before fitting the new component. Any vehicle manufacturer fitment recommendations should also be followed. Additionally, some rocker cover gaskets require a small amount of sealant applied to the cover at certain points before final installation. The technician should always tighten any fixings to the recommended tightening torque settings to avoid distorting the rocker cover during replacement.

febi offers a range of over 45 rocker covers, suitable for a wide selection of popular vehicle applications. It also offers “Fast to Market” covers, often being the first brand to make rocker covers available in the aftermarket. Associated products, such as Breather Hoses, are also part of the offer as generally it is also advisable to replace during every repair. 

febi rocker covers are made to OE matching quality and all gaskets and screws required are included to offer cost-effective and convenient, professional repair solution. 

For information of the range and applications visit:  partsfinder.bilsteingroup.com