Hey folks,

I'm refreshing a 1972 Mercedes 280SE 4.5 as documented here:

https://www.garagejournal.com/forum/threads/motorcycle-build.452813/page-5

I'm looking at the cylinder heads and I have a few questions.

• 1 In the pictures attached I have corrosion in some the "blocked off" water jackets. What do you folks do for this?
• 2 Which ones are supposed to be open and which closed?

Thanks in advance.