Mercruiser Closed Cooling System Problems
Mercruiser Closed Cooling System Flow Diagram Perfprotech Com
Mercruiser closed cooling system problems. You may want to check the impellar like Iggy said. Replace the serpentine belt with a new belt. This cools the engine block exhaust manifolds.
Another benefit is that I could run a higher temp 160deg thermostat instead of the 143 and the engine will run more efficiently. Once the safety margin in the expansion tank is used up air will enter the closed system. With closed cooling you get an early signs of the problem in the form of lower coolant level in the expansion bowl.
Think of it as cholesterol plaque in your cooling system. Since most exhaust manifolds are made of cast iron rust and corrosion are always present. Air is a very poor conductor of temperature and therefore will force a cooling system to overheat almost immediately if a significant amount is contained within the fluid.
Im assuming it is not the raw water side. Some leaks may be difficult to find unless system is under pressure. One is physical blockage of cooling water flow which will obviously have an extreme effect before too long.
Mercury MerCruiser engines have either a seawater cooling system or a closed cooling system. This pressure is created by normal engine temperature. One of the difficulties facing the marine cooling system or any cooling system for that matter is in separating the air from the coolant.
It is more likely you have a stuck closed thermostat or the coolant pump for some reason is not pumping. Ether raw water or closed if you have a riser clogged then you will have a high heat condition. Start engine and check for leaks.
I converted mine to closed cooling but I am in salt water. This required a way to separate the cooling system from the engines crankcase area.
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Air is a very poor conductor of temperature and therefore will force a cooling system to overheat almost immediately if a significant amount is contained within the fluid.
On average this kit will take 4-6 hours for installation. Its possible that some debris is clogging the exchanger or oil coolersea strainer. On average this kit will take 4-6 hours for installation. 1993 2452 57 Bravo II. I put a FULL closed cooling system on both of my Mercruisers twins but they are Bravo drives. The aluminum circulation pump impellar was located on the front end of the camshaft. This pressure is created by normal engine temperature. Finally the third most common reason of an overheat problem with the cooling system can be attributed to clogged water passages usually in the exhaust manifolds. All of the 470 and 37L versions used closed cooling systems.
Ad A Boat Mechanic Will Answer Now. Since a mixture of air and coolant is insufficient as a heat carrier overheating will result. I put a FULL closed cooling system on both of my Mercruisers twins but they are Bravo drives. How to Install a Closed Cooling System on a Mercruiser 43L - YouTube. The aluminum circulation pump impellar was located on the front end of the camshaft. 1993 2452 57 Bravo II. This pressure is created by normal engine temperature.
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