juhasev
Cadet
- Joined
- Jul 8, 2011
- Messages
- 9
Bondo thanks for you thoughts! All this started when my impeller broke and engine overheated. Although I shut of the engine immediately the heads still cracked and I am almost 100% certain that overheating caused it. And because the engines are raw water cooled this condition can happen quite easily i.e. temporary blockage in the out drives water pickup, broken impeller etc... Therefore I am heavily leaning towards steel re-enforced seats.
The other issue I noticed was excessive wear on the seats ~ 350h. You could literally see and feel a ridge on the seats that had already formed up... Valves bound hard against the seats which makes the steel seat much better option that protects you against deforming like the cast iron. I can have my machine shop to put them in... Somebody quoted me just $60 per head to get the operation done.
The other issue I noticed was excessive wear on the seats ~ 350h. You could literally see and feel a ridge on the seats that had already formed up... Valves bound hard against the seats which makes the steel seat much better option that protects you against deforming like the cast iron. I can have my machine shop to put them in... Somebody quoted me just $60 per head to get the operation done.
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