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09-11-2011, 04:38 AM
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walbro fp
Join Date: Dec 2010
Location: spokane
Posts: 479
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black cubes in block water jackets...block catalyst?
so, when i was putting the cyl head on the motor the other day, i was inspecting the water jackets (damn my ocd cleanliness) and saw two 1.5 inch sized, black cubes that look like coal or charcoal, and i was concerned as to what they were.
my thought was a block catalyst of sorts, to prevent corrosion. i just want to make sure its not something foreign, that shouldnt be in there. any thoughts? i know, i should have taken pics, but i forgot so 
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87 toyota 4x4 single cab short box pickup, 7MGZE. |
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09-12-2011, 02:12 AM
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 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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Might want to post a picture, because I have no idea what you could be talking about... I don't even know where where in the coolant system could you fit *anything* 1.5"x1.5"x1.5"???? That would plug the radiator hoses and they're the biggest coolant passages there are.
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09-12-2011, 02:41 AM
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20psi boost
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
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09-12-2011, 06:32 AM
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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That's kind of what I was afraid someone might offer up... ACK!
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09-13-2011, 01:10 AM
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walbro fp
Join Date: Dec 2010
Location: spokane
Posts: 479
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damnit, thats exactly what it looks like. well, i wish the machine shop had noticed that and took them out. guess it wont technically hurt anything, but now they are in there till that motor gets torn apart again...
yea, they look like they were stuffed through the freeze plugs. i guess i could take the freeze plugs out and redo it, but i think ill just let it be. aside from that, the motors pretty much done, ill post some pics, thanks for the help guys! at least its not a piece of the block. check my album for new pics, lemme know what you think!
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87 toyota 4x4 single cab short box pickup, 7MGZE. |
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09-13-2011, 06:56 AM
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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Wow... I guess they didn't read the instructions... you're supposed to crumble them up and pour the stuff into the radiator... it's like compressed alumaseal. Personally, I wouldn't leave it... especially not in big pieces. Could break up and clog the radiator, thermostat and possibly chew up the water pump impeller. Can you break them up with a screw driver and wash them out? A bypass filter on the TB's coolant line could be employed to filter out any unwanted remnants over time.
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