Exploded Cylinder Head

Practical engineering vs theory

Knowledge Base


Recently, in the workshop, we were overhauling a 12-cylinder engine, and it led to us creating a technical update due to the technical publication being incorrect.

During the cylinder head overhaul, we noticed that there was only one washer under each valve spring.

Although this was how the engine arrived, we knew this was incorrect, but its easy to see why there was only one washer installed when looking at the technical guide.

Image from the technical publication showing only one washer under each valve highlighted:

However, on further reading, you can see on the parts list, that the correct number of washers is listed – easy to miss if you’re just looking at the illustrations:

Our technical update reflects this, and the information has been shared with all of our engineers as standard.

I just wanted to highlight that although there are technical publications instructing you how to complete the task, without in-depth knowledge these can sometimes lead to incorrectly built engines or components.

Have you come across any issues when working practically, through experience vs following the technical procedures?

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