I've had success lately with repairing corrosion damage on 1HZ steel air filter housings. Tiny rust holes are possible in some areas after blasting on bad units. I simply apply non-acid solder paste to the steel, and flow steel-type lead solder over the holes with a large 100W iron.
Usually the damaged areas are on the dirty ( outside) side of the filter.
Cleanup is easy with a file and a flapper disc to bring everything level.
As the part doesn't get any real heat, and the original steel is very thin, this is an acceptable repair.
I cover off my repaired and blasted bare steel with black DOM-16, available here in Canada. You could also use POR-15 for most areas. Black spray rust paint is required to get into some of the tough areas.
Usually the damaged areas are on the dirty ( outside) side of the filter.
Cleanup is easy with a file and a flapper disc to bring everything level.
As the part doesn't get any real heat, and the original steel is very thin, this is an acceptable repair.
I cover off my repaired and blasted bare steel with black DOM-16, available here in Canada. You could also use POR-15 for most areas. Black spray rust paint is required to get into some of the tough areas.
