when i first got the 88 rx7 n/a it was fine after a lil while of driving it didnt beat on it.. i would hear bubling....when i was done driving and the car off.. the more i had one day it started blowing dense white smoke and rotory guru i know said my block might be cracked.. he recomened a fluid call water glass or sodium silicate... i did extensive flushing of the cooling system then i used the water glass and bam... no more smoke ....

any body ever heard of doing this or has done it before

 

Of course, in the process you have plugged every cooling passage in the engine, the radiator, the heater core (have fun with that one), etc.

 

Isn't that the same **** they used to disable the cash for clunkers cars?

I've had success with Alumaseal, but I chose that product specifically because it uses aluminum, which won't cause any damage if it finds its way into the combustion area (aluminum flakes are highly flammable).

 

Wow... are you trading in a clunker and thinking of helping out the dealer??

I've had good results using "crushed almonds." I can't remember the name of the product right now (the package is in the car) but you can find it at any auto parts store. Its basically pellets about the size of a quarter that are made from very finely crushed almonds. Basically they stay moist in your system until they hit air (a leak or crack somewhere in the system). When they come in contact with air they harden and it essentially seals the crack.

Edit: Here's a pic of what they look like in the package.

 

i kept the the thermo stat out so the water pump kept circluating the water..... and to seize up the motor dealers put the sod sil in the oil not the cooling system.. car runs fine never over heats stays really cool...