I pulled the heat exchanger
off my 4-108, took forever and I don't look forward to getting it back on and connected. But the problem of the moment is cleaning
Close to half the tubes were fully or mostly clogged. I have reamed out all but 2 of them (which are clogged solid). But even the ones that now have flow still have buildup in them, just as there is caked around the top of the honeycomb.
What's a working way to clean this? The radiator "dip" shops I remember from way back when are gone. I went to the auto parts
shop but all the heavy duty radiator cleaners of times past are also gone. There is only the quite mild "Prestone Super Flush" whose active ingrediant is merely sodium citrate. A guy at the counter recommended I go to a home/industry a/c service
company and get a spray cleaner they use to clean the vanes on external a/c units. I have a recollection from way back of someone saying concrete cleaner (muriatic acid) was the way.
I'm open to experienced suggestions.
Oh... and about the gasket
. At the end where the cap comes off there is a round rubbery gasket
the cap and the division between the two halves of the tube. Is this a special part? Readily available or no? Or can I use rubber gasket material and cut to fit?
I know that eventually I will replace this unit. And when I do it will be with one from a larger perkins
model, for this exchanger is no bigger than the one I had on a 25hp British diesel