I have 2 x 450Hp Cummins diesel engines that need to be flushed. I have 2 questions: 1. There is no mention of removing the thermostats and/or running the engines to temp first. How do you ensure circulation through the whole block? A closed thermostat would restrict circulation, no? 2. When you removed the shaft seal cooling line, did you plug the line, or leave it open? Thanks in advance for input/thoughts from the combined UA-cam brain trust :-)
Barnacle buster does not circulate though the engine, only the heat exchangers, e.g. Fuel cooler, gear cooler, aftercooler and coolant heat exchanger. The cooling system in the engine is closed and filled with antifreeze. I believe you would have to seal that hose somehow. I would have just pinched it with something like a needle vise grip, but not tight as to damage the hose.
This stuff is the definition of half assing it. No point of doing the sea water side if the air side on the intercooler is oil soaked. Same with the coolant side of the heat exchanger being caked with bad coolant.
Yes, I agree about the aftercooler as that should be taken apart and cleaned. But I think doing this annually is a good idea, and then take the thing apart every 3 to 5 years for a thorough service. I personally would take the hose off the back of the pump and not bother with removing the impeller. Of course, if you wanted to replace the impeller anyway, go for it. For some though, they do not do anything until something fails. I found this out when looking a good used boat and nobody could come up with any records of aftercooler or heat exchanger service.
You might think it is, but luckily it is not. Muriatic acid is highly corrosive and will eventually destroy an engine. Barnacle buster is not corrosive and does not foam as a regular acid does. Because of this the engine will be cleaned completely and does not affect gaskets and materials. And yes, the blue colour is indeed a dye. So you are 50% correct.
I use Muriatic acid diluted 5 parts water to 1 acid. It really seems to work well. Have a Yanmar engine doesn't seem any worse for it and a lot of stuff comes out of there
I think muriatic acid would destroy anything that was aluminum. Of course, there should not be anything aluminum in the raw water cooling system anyway.
why not fire up the generator and a/c so we cant hear anything?
How much water do you need and how much barnacle to flush a Yanmar 720hp?
I have 2 x 450Hp Cummins diesel engines that need to be flushed. I have 2 questions:
1. There is no mention of removing the thermostats and/or running the engines to temp first. How do you ensure circulation through the whole block? A closed thermostat would restrict circulation, no?
2. When you removed the shaft seal cooling line, did you plug the line, or leave it open?
Thanks in advance for input/thoughts from the combined UA-cam brain trust :-)
thermostats would be on the closed coolant side of the system correct? this runs through the raw salt water side
Barnacle buster does not circulate though the engine, only the heat exchangers, e.g. Fuel cooler, gear cooler, aftercooler and coolant heat exchanger. The cooling system in the engine is closed and filled with antifreeze. I believe you would have to seal that hose somehow. I would have just pinched it with something like a needle vise grip, but not tight as to damage the hose.
how do you know it worked?
This stuff is the definition of half assing it. No point of doing the sea water side if the air side on the intercooler is oil soaked. Same with the coolant side of the heat exchanger being caked with bad coolant.
Yes, I agree about the aftercooler as that should be taken apart and cleaned. But I think doing this annually is a good idea, and then take the thing apart every 3 to 5 years for a thorough service. I personally would take the hose off the back of the pump and not bother with removing the impeller. Of course, if you wanted to replace the impeller anyway, go for it. For some though, they do not do anything until something fails. I found this out when looking a good used boat and nobody could come up with any records of aftercooler or heat exchanger service.
anybody else think this is just muriatic acid with blue dye in it.?
You might think it is, but luckily it is not. Muriatic acid is highly corrosive and will eventually destroy an engine.
Barnacle buster is not corrosive and does not foam as a regular acid does. Because of this the engine will be cleaned completely and does not affect gaskets and materials.
And yes, the blue colour is indeed a dye. So you are 50% correct.
Hydrogen Chloride at about 10%
Pull the SDS and you'll have your answer.
I use Muriatic acid diluted 5 parts water to 1 acid. It really seems to work well. Have a Yanmar engine doesn't seem any worse for it and a lot of stuff comes out of there
I think muriatic acid would destroy anything that was aluminum. Of course, there should not be anything aluminum in the raw water cooling system anyway.
Audio is terrible