Recently noticed a coolant leak, realized it was coming from a hose all the way in the back of the engine, so i was like what the hell i will replace all the coolant hoses. So i cut one open do take a gander at the rust inside, and i is all built up o the sides. the same goes for my coolant tank which i have washed out ten thousand times. Even after flushing the rad and eng. there is still rust in there. what do i do?

 

most autoparts stores have a super flush, which has to be left in and driven for about 6 hrs. That is what i had to do with one of my trucks. You may have to reapeat the flushing again, depending on how bad your rad. is.... You may be able to find a cleaner far much better than what you will find at an autoparts store.

 

four years ago I noticed scale and rust in my radiator I bought a new one from pontiac dealer $300 and always use 50-50 distilled water and antifreeze never any scale buildup anymore