Mobile Diesel Service uses a pair of Case IH/New Holland dual valve covers (PN 2830784) with matching breathers (PN 504069558) from the 3.9L Cummins 4BT engine to replace four of the six stock ...

If you see any oil leaks between your Toyota Corolla’s cylinder head and its cover, it means that the gasket between the two parts is shot and you need to replace it. The job is not that easy ...

While installation isn't as easy as, for example, a typical carbureted 289 (which has only six bolts per cover), Marlo's Frame and Alignment was able to install the blue, powdercoated covers on ...

Swapping to a larger cam? Learn how to change your valve springs with the heads on or off the engine.