I went to kero heat 8 years ago with. Northern tools....
Never regretted it
I went to kero heat 8 years ago with. Northern tools....
Never regretted it
5 years is not a bad amount of time for that type of heat exchanger. I realize that at about 600 bucks a pop it is pricey. I have had good success removing the cap and silver soldering the tubes that are bad. It is a time consuming project but I am not really that good at it just am able to do it. You might take the old ones to a radiator shop and most old school ones should be able to repair them.