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

    Would my IR temp be as good as using the Diacom? I have to take my laptop into the cabin to be able to read it. Kind of a PIA. IR temp gun is a lot easier.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I used my cell phone camera to enlarge the directions on the expansion tank. Should have read it first. It says to fill the expansion tank and run the engine at 1500 RPM for 10 minutes.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Now do I do a couple of 10 minute runs at 2000 RPM (with cooling time between each run) to try and get the air out or drain the coolant into a clean bucket and then vacuum fill it from the clean bucket of used coolant?
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    With a boat with closed cooling you could analyze the engine oil, coolant and outdrive gear oil. I have a WIX coolant analysis kit to use before winter.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I routinely do oil analysis (UOA) for the oil in my diesel pickup. But I run the oil for 16K miles typically. However the oil sump is 14 QTs and I use a bypass oil filter that filters down to 2 microns. You will see many of my UOAs for diesel engines and older ones for gas engines. Wife says...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I asked the same question on a few forums. One being BoaterEd.com. It was a very active forum when George and Lou were around and ran a marine parts company. I am active also on Bobistheoilguy.com. You have to be a pedantic oil guy to enjoy that forum. They have a boating sub-topic.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    That hose is from the riser so it's sea water. It's scheduled for spring 2023 in my notebook.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    So with rain over I got back to my boat. Got an air powered setup (which I really like as it has a valve to isolate the air supply after reaching the proper pressure), put some water & Dawn on the cap gasket to lubricate and used the adapter cap key to tighten the adapter cap. This time...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Workshop manuals ordered, although website has many glitches and they appear to being shipped from Sweden. Hopefully rain will stop soon in DE. I have a better air powered cooling system pressure tester with a ball valve to shut off the air supply once the proper pressure is reached. Little...
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    Motor has power, won’t turn over

    You need a DVM and do some digging around. I would start at the starter solenoid. You will need a second person.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I tried the cooling system pressure tester on my 2015 F250 pickup and it lost almost 2 lbs in maybe 45 minutes. So I am thinking it's a defective cooling system pressure tester.
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    The exhaust elbow is only 125F so it's the proper temp. I want to get by the current problem with overheating exhaust manifold. Then pull the exhaust elbows. The exhaust elbows are OEM only. Over $1000 each. Probably because of having a catalytic converter between the exhaust manifold and...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    The issue is on the closed cooling side and I see no indication of any corrosion as the coolant looks in new condition. And the temp sensor in exhaust manifold is along the top surface where an air pocket is likely to be. Remember it's happening at the same time on both exhaust manifolds so...
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    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I am thinking my next test is to try and get rid of any trapped air by running the engine at 1500 for 2 or 3 minutes. If the goal is to get rid of the trapped air is it best to run with the cap for the expansion tank off. With a leak potential in the heat exchanger I guess I don't want to pull...
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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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