Removing rust from block?s water passages.

[Revenge]

What is the best way to remove rust paticles from the block?s water passages without totally refurbishing the block? I believe the word is called scaling. My concern is rust particles blocking the Exhaust Manifolds and Risers.

Thanks.

 

[Mischief Managed]

Re: Removing rust from block?s water passages.

I have cleaned a lot of sediment out of my block with short duration shots of compressed air into the block drains while the engine is running on muffs. I open the drains, insert a rubber tipped air nozzle, blast a little air in the drain to stir things up and then pull the nozzle away to let some water/sediment drain out. It took more than 20 shots, per side, before the water drained clear the first time. I do it every year now, when I winterize, and only a little sediment comes out.

If you can get to some freeze plugs on the block, removing them will allow you to remove some sediment. With the manifolds off, they are pretty easy to get to.

 

[wca_tim]

Re: Removing rust from block?s water passages.

side note / comment:

Don't do this unless you're sure you don't have any aluminum water passages: ie aluminum intake, manifolds or risers, etc... at high ph aluminum will literally dissolve in pretty short order