I have a 4 inch hairline crack in the maniflod right beneath where the firing order is stamped. The crack is very small, nearly undetectable - it looks almost like a paint chip is coming off. When the engine is running at low RPM nothing appears to be wrong however at higher RPM small amounts of water seep out the crack. All that said I have 3 questions.
1) What is the best corrective action to take. Should I start planning on replacing the entier manifold or is there another alternative?
2) How critical is it to make the repair? Can it make it until the end of the sailing season? (I sail on an inland lake approx 1 mile wide and 7 miles).
3) I want to perform the muratic acid flush described on this site as part of a thermostat replacement and water pump upgrade project. What are the thoughts of performing the acid flush with the crack there?
Thanks in advance for any advice.
1) What is the best corrective action to take. Should I start planning on replacing the entier manifold or is there another alternative?
2) How critical is it to make the repair? Can it make it until the end of the sailing season? (I sail on an inland lake approx 1 mile wide and 7 miles).
3) I want to perform the muratic acid flush described on this site as part of a thermostat replacement and water pump upgrade project. What are the thoughts of performing the acid flush with the crack there?
Thanks in advance for any advice.
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