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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I agree the leak does need to be dealt with but what is causing the overheat? Once I resolve the overheat I am plan to pull the heat exchanger and get is tested and possibly repaired. Or replaced.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Ok, while it's a leak I need to deal with it's not the cause of the overheating as long as I keep my eye on the coolant level. Is air in the cooling system the problem?
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    TWIN 1994 VOLVO PENTA 8.2 OVERHEATING

    They are new so very unlikely. Hopefully they used the right gasket between the exhaust manifold and exhaust riser.
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    TWIN 1994 VOLVO PENTA 8.2 OVERHEATING

    I started but did not finish. Anyway my questions would be what others have already asked. In the water or on muffs or maybe the flush port if the engine has one? With both engines overheating it's likely to be the water supply. If on muffs while the engine is running is the garden hose...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Got to the boat today and one of the caps in the cooling pressure test kit fit so I did a cooling system test. Lost 2 lbs in 30 min. Expansion tank was down only 1 PT from last test run where is overheated. So one of my thoughts for a potential problem was I had lost a lot of coolant during...
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    TWIN 1994 VOLVO PENTA 8.2 OVERHEATING

    I'm
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I will check the small hose. Then 1500 RPM for 2 minutes will drive any trapped air out if that way is going to work? Faster? Longer time?
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    Raw water pump pulley

    You will need a new pump. Not every piece of the Volvo Penta engine is sold as an individual part.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I understand what you are saying. My issue right now is finding the coolant. My local dealer does not stock it so I ordered a case from them. I have ordered some online but they are out of stock now. Maybe I could drive out the air by rev'ing the engine several times?
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I have one of those but what would I need to do? Cooling System is full, maybe with some air pockets. Drain the system and fill using the vacuum filler?
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Ok I will try and drain the sea water before doing a pressure test. I did not add coolant while the engine was running rather added coolant to the FULL line then ran engine for two minutes. Added more coolant. Ran by engine for another two minutes and added more coolant. Then started engine...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Tried to get the proper adapter cap for the cooling system expansion tank from a VP dealer but they said they could not get it. So I ordered a cooling system pressure test kit from Amazon with an assortment of adapter caps. Hopefully one will fit. Still trying to figure what could be wrong...
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    Engine Fire

    A fire suppression system is the best solution.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I did register the engine and so any recall notices should be sent to me. I went to the Volvo Penta website to order some manuals but when I click on the cart icon I get a web page not found error. Guess I will ask the dealer. I'd like to pressure the closed cooling system but unsure of what...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Looking at your post and the the cooling system diagram on the VP website. What would cause the engine to not overheat but the exhaust manifold to overheat. And the exhaust elbows to be normal temp? What would happen if the closed system was filled with coolant but not moving around? Would...
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    New 5.7 overheating

    Many marine engine have two thermostats available. A lower temp one for RWC especially in salt water. And a higher temp one for closed cooling.
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    New 5.7 overheating

    Does this setup have an impeller in the outdrive? Some do. Maybe only Mercruiser Alpha One. You have have an oil cooler or PS cooler inline from outdrive water pickup to engine. Clogged? Wrong manifold or riser gaskets that are blocking a water path and should not. Too much sealer in exhaust...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I was thinking of testing the coolant. But which system would be at the higher pressure? I am thinking the closed system with coolant. I am looking for a leak where a gallon or two of coolant could disappear.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    That leak you pointed out is in the exhaust elbow and most likely raw water. I would see that in the bilge. Yes I need to look into that. I am looking for a much larger leak of coolant. I am assuming heat exchangers are like exhaust elbows and need replacement every so many years when used...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    So there are no obvious coolant leaks. No coolant in bilge. Possibly previous owner was careless about maintenance? What if there is a leak in the heat exchanger and the coolant is slowly being pushed into the raw water side and out the exhaust? Except for the coolant level dropping how...
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