Your fleet running reports

[V8Granite]

You also want heat away from the valve when it's stopped as you get carbonisation of the oil.

When the ventilation isn't sufficient you will have turbo bearing issues and valve guide seal issues. We also have valve seat issues but we have water cooled exhaust seats.

Same problem, different sizes.

Dave!

[Jobbo]

I am using Hebridean weather to extract heat.