bc.gold 3,403 #1 Posted February 24, 2021 Interesting chemical with many uses. 2 1 Share this post Link to post Share on other sites
DennisThornton 4,769 #2 Posted February 24, 2021 3 hours ago, bcgold said: Interesting chemical with many uses. I keep some around. Prime ingredient in most exhaust repair products. I have a 2000 F150 that is is pretty good shape for it's age but the right cast iron exhaust manifold rusted a dime size hole right through! It is VERY hard to get to and then there's all the expected broken bolts to deal with in a place where they just can't be dealt with! Just about have to pull the engine, at least part way. I got to the area with a little hand held sand blaster and a few application in layers of the exhaust repair and it's quiet again. I expect I'll have to repeat periodically but its a few minute repair from here on. Lot easier than replacing the manifold! 1 Share this post Link to post Share on other sites
Jeff-C175 7,199 #3 Posted February 24, 2021 Works pretty good as a refractory repair in boiler chambers too! 1 Share this post Link to post Share on other sites
wh500special 2,163 #4 Posted February 24, 2021 (edited) We used to use sodium silicate mixed with sand to make cores for some composite parts. When they were done right, they could be washed out of the finished part with a pressure washer. often they weren’t done right... I am 99% sure that sodium silicate was the lethal injection given to the engines on the “cash for clunkers” cars back in 2009 or whenever that was. They dumped it in the oil fill and ran the engines until they seized. I had the same manifold problems on my ‘97 as you, Dennis. My mechanic welded them up a couple of times to quiet it down. Eventually my solution was to let the truck be somebody else’s problem. That thing was soooo rusty underneath all kinds of things seemed on the verge of disintegrating. steve Edited February 24, 2021 by wh500special 1 Share this post Link to post Share on other sites
DennisThornton 4,769 #5 Posted February 24, 2021 2 minutes ago, wh500special said: We used to use sodium silicate mixed with sand to make cores for some composite parts. When they were done right, they could be washed out of the finished part with a pressure washer. often they weren’t done right... I am 99% sure that sodium silicate was the lethal injection given to the engines on the “cash for clunkers” cars back in 2009 or whenever that was. They dumped it in the oil fill and ran the engines until they seized. I had the same manifold problems on my ‘97 ad you, Dennis. My mechanic welded them up a couple of times to quiet it down. Eventually my solution was to let the truck be somebody else’s problem. That thing was soooo rusty underneath all kinds of things seemed on the verge of disintegrating. steve Was my Dad's. Frame is solid and everything works. But the bottom of the core support is shot. Common I gather for that age. I owned a body shop so it's fixable. Never seen a cast iron exhaust rust like that but it's pretty thin to start with. Weight reduction... CAFE ! Share this post Link to post Share on other sites
