rust

[string194]

hi i am new to inboards can any body tell me the best way to flush the block for rust? the boat is a 1986 crestliner with a gm 4.3.it is not a closed system. thanks for any help

 

[smithrock]

Re: rust

bump

 

[dgopetactical]

Re: rust

bump

 

[wire2]

Re: rust

String, can't tell where you are, do you have a winter storage situation? If so, that's when most of the rusting in the block & heads occurs, if you just drain the water and then forget it. Much better to drain the water, put all plugs & hoses back on, then pump 50/50 water & antifreeze into it and leave it in there til next boating season. Then drain & save it, don't flush the anti freeze into a lake.
If you're trying to get the accumulated rust out of the block, there are caustic solutions to do that, (engine rebuild shops use it) but why do you feel you need to?

 

[thrasher]

Re: rust

Are you sure it's rust that you want to get rid of? Most Raw water systems suffer from Calcium deposits not rust!!

Gary

 

[string194]

Re: rust

i bought the boat as a prouject boat it has a lot of rust around water intake at block i am just trying to cover all my bases on fixing up boat i have never owned a in board . i live in central georgia thanks for all the info string194

 

[RatFish]

Re: rust

MST Guardian http://www.mstguardian.com/Treatment.htm use to have something for rust but it looks like they are out of business.

 

[Scaaty]

Re: rust

Replace the rust and scale will just give way to fresh metal to do the same..(manifolds go every 4 years in salt--6-10 fresh...blocks...don't worry about'em)

 

[Bondo]

Re: rust

If so, that's when most of the rusting in the block & heads occurs, if you just drain the water and then forget it.

Ayuh,.......... That Pure Bull$h!t...........