overheating

[plab]

I recently bought 1969 IH 154 cub lo boy . runs great but the engine overheats, so I got the radiator off and pulled off the upper and lower goose necks.. wow full of sludge.. whats the best way/stuff to clean it out ?

plab

 

[rustred]

best way - rad shop.

 

[Lew in UT]

what I usually do is go barrow 1, or 2, cups of C.L.R. from my wife drain the antifreeze out and fill with water add the C.L.R. run for about one hour or tell hot, let stand for an hour or two! drain and see what it look like if its real bad! you mite have to repeat.
It will remove as its name implies Calcium, lime, and rust.
you will find that most of the brown dirt looking stuff in your rad. is rust not dirt, that has flaked off of the inside of the water chambers, in side the engine and, some of it stays in suspension some falls out and falls to the bottom of the water jackets and turns to a sludge.
look in side of the fill hole under the filler cap and see if the tubes have a build up in them, if so this is most likely calcium or lime.

try it you will like it
Lew from UT.