Are you reading all here? He`s just getting heads. Hot-tank and check of heads, yep got a good set for rebuild.
Yes I am reading, but can you say without a doubt that nothing else went wrong with them because of the scilica?... Lets see he has to buy the heads first, then he would have to pay to have them run through the hot tank and to have them checked.... Now if he was minimal on cash and found out they could not get all of the crap out of the heads and he just spent $50+ on two big cast iron paperweights hmm.... would you risk it? I am just adding another perspective to your arguement and you are trying to put me down because I dont see things your way. I will say this, I have very little extra money at this point in time to work on my maverick, so I have to plan in advance, and whenever I look at anything and see a 50% chance of failure I save my money and move on to the next possibility.
Sodium silicate is water soluable - a good washing machine will remove it and I would want the heads cleaned and tested before I used them anyway. I used a lot of sodium silicate (water glass) in the past because it is a fire retardent chemical. Even after it hardens (with air and / or heat) it disolves in water.
This is taken from the CFC requirement data on the destruction of the engines. "To ensure that vehicles traded-in under "Cash For Clunkers" will not be resold by dealers, the program outlines a procedure for destructively disabling the engine (and thus also precluding the possibility that any mechanical engine components might be salvaged to be used in the repair of any other vehicles): The motor oil is drained and replaced with a sodium silicate solution, then the engine is started and run until the solution, becoming glass-like when heated, causes engine internals to abrade and ultimately seize.[36] In addition, the salvage or scrap facility which acquires the vehicle cannot sell any powertrain components from the scrap vehicle. This includes the disabled engine (most specifically the long block components), the transmission/transaxle, and in some cases the axle assemblies. The salvage or scrap facility can sell any other component from the scrap vehicle until they are ready to crush and/or shred the vehicle. The salvage or scrap facility has 180 days to ultimately crush and/or shred the vehicle" http://www.cars.gov/files/official-information/CARS-Report-to-Congress.pdf http://www.cars.gov/files/disposal-salvage/engine-disablement-procedures.pdf and here is some interesting facts about Sodium scilicate that is used in the automotive industry already "Sodium silicate can be used to seal leaks at the head gasket. A common use is when an alloy cylinder head engine is left sitting for extended periods or the coolant is not changed at proper intervals, electrolysis can "eat out" sections of the head causing the gasket to fail. Rather than remove the cylinder head, "liquid glass" is poured into the radiator and allowed to circulate. The waterglass is injected via the radiator water into the hotspot at the engine. This technique works because at 210–220 °F the sodium silicate loses water molecules to form a very powerful sealant that will not re-melt below 1500 °F." http://online.wsj.com/article/SB124...ia?loomia_si=t0:a16:g2:r5:c0.077553:b26935024
First off,,, I am not putting you down. I'm saying as I read his question on "complete rebuild" of heads. He's looking at 12 heads off these engines, wanting to rebuild more then one set, or experiment with porting on one and ending up with a good set. If your getting engine heads from the junkyard, I think you are going to want an rebuild them. Now if you want to talk morals on this subject of CFC, That's a whole different ball game! That was not a question on this and I have my own separate thoughts on this and will not throw stones from my glass house! From your own link on the solution ,,, Car engine disablement Sodium silicate solution is used to inexpensively, quickly, and permanently disable automobile engines. Running an engine with two quarts of a sodium silicate solution instead of motor oil causes the solution to precipitate, catastrophically damaging the engine's bearings and pistons within a few minutes.[4] In the United States this procedure is required by the Car Allowance Rebate System (CARS) program.[4][5] Bearings and pistons are damaged. Earlier as you have even stated, it's use to repair, but they are talking about water jackets. With or without the destroyed engines, when you buy parts from a junkyard you take a chance of cracked, warped, and other damage to the parts. I have taken parts from yards and due to lack of funds have shoe-strung several projects because that is all I could afford and needed my car running. Money was not being a issue here when he said of complete rebuild. Yes If I wanted to undertake this project of getting CFC heads, I would take it on and feel very confident of success! I would understand that some of these heads may not pass mustard. The CFC program was not at fault of well worn heads before they ever hit the dealership. There is nothing wrong with expressing opinions,,, that is what he is asking and he has to make his mind up after hearing what all is presented. Engines as a whole,,, I don't know if I would undertake that or not. Have to talk to a machine shop and investigate that lots more. But he was not talking blocks just the heads. This is what made me ask if you read his question,,, """" The next question I have is would you really be willing to risk running heads that might have chunks of that stuck in the oil passages on a fresh rebuild? You can boil and wash and whatever but you still might not get all that crap out till you run the motor for a little while and the constant expansion and contraction of the cast iron breaks the silica free and runs it through your nice fresh rebuild. """" Where would the oil passage ways be in the heads for this crap to get stuck in? I have no problem with you nor am I putting you down. Nothing wrong with discussing this as I think that is what he wanted to see if any problems may come of this. My opinion is no,,, yours is different. No problem, thats what makes the world go round! Copy and paste changed my font,,, not sure why and I'm just letting it go that way.
That's bad !! i never knew thay did that, i tough it was a good plan as it got clunkers out of the street but parts should be avalable for peoples skilled emough to make good out of it.
Yeah, but the junk yard isn't supposed to sell anything with the orange paint applied, ie engine parts.
The junk yards in CA will sell anything except the short block. Heads, intakes, distributorless ignitions, etc. are fair game.
the funny thing about that is the paint is across the top of the motor. the shortblock doesnt even get touched with the paint.
