What causes a blown head gasket in a boat?
This Blown Head gaskets are a direct result from severely overheating the block and heads. The owner did not test his sea water pump for proper flow prior to launching. This is why we stress replacing impellers at least every other year.
How do you tell if your boat has a blown head gasket?
Water in the oil. Pull your Oil dipstick and see it the oil looks a milky whitish/brown color. Look inside your valve cover, thru the oil fill cap an see if you see this type of residue as well. If so, you have a blown head gasket.
How much does it cost to replace a head gasket on a boat?
Mercury Mariner Head Gasket Replacement Cost Estimate. The average cost for a Mercury Mariner head gasket replacement is between $1,599 and $1,919. Labor costs are estimated between $1,111 and $1,401 while parts are priced between $489 and $518.
What causes coolant to come out of a blown head gasket?
Because the cylinder head gasket seals coolant passages, a blown head gasket will allow coolant to enter the cylinders. Coolant in the cylinders will cause: Since the cylinder head gasket also seals in the coolant and oil, you may see streaks of oil and coolant streaming down from the gasket.
Can a blown head gasket cause an external leak?
While most people are aware that a blown head gasket can send fluids to other parts of your engine, it’s less well-known that blown head gaskets can lead to external leaks. It’s all about where the leak is.
What does the head gasket do in an engine?
Cushioned between these two massive engine parts is the head gasket. One of the most critical gaskets in your engine, the head gasket is designed to seal the cylinders’ firing pressure and to prevent coolant and engine oil from leaking into the cylinders as well as to the outside.
Why do I have smoke coming out of my head gasket?
So, if you find that you have to keep adding coolant to the system but there’s no visible leak, there’s a good chance that your coolant is heading somewhere it shouldn’t inside your engine. If you have excessive smoke, it’s getting into the combustion chamber, and if you have a milky colored oil it’s getting into the oil channels.