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He says that anything over 70/30 (which I run between 60/40 and 70/30) will corrode the water passages. I don't know what the previous owner ran, but as far as I know, the engine builder installed and tuned the motor. It had 1500 miles when I bought it and I put less than 1500 miles on it before disassambly. I cannot believe that 3000 miles could eat away passages like that.
I don't know if the oring was pinched or not - I don't have that much rebuild experience to tell |
i dont think you can blame the broken casting on anything. that kinda just happens.
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Originally Posted by BOTTLEFED' post='872117' date='May 16 2007, 09:09 PM
I shouldn't say who built the engine right now - we are getting this straightened out The builder claims that this all happened after the rebuild. He says that the oring failure occurred because too much water was run in the coolant mixture and rusted the passages in the irons - in 3k mi. after rebuild. He says that he never uses black silicone so the motor must have been opened up after he rebuilt it. And he says the chain was not replaced because the motor was a reman that they bought(new?) and rebuilt. |
Originally Posted by BOTTLEFED' post='872190' date='May 17 2007, 09:52 AM
He says that anything over 70/30 (which I run between 60/40 and 70/30) will corrode the water passages. This is true. A 50/50 mix will also corrode the passages. Straight coolant will also corrode the passages. Unless the coolant you drained out was red to dark brown with rust, you did not see the kind of wholesale corrosion necessary to damage all of the iron parts in only 3k. Corrosion isn't picky, it wrecks everything, not just one or two little pieces, so everything would be rusted and scaled. This does not appear to be the case. Further, the rotor housings and other aluminum parts typically will suffer much sooner than the iron parts. |
in fact I changed the coolant twice during the time I ran this motor and the coolant was fine both times - in fact I reused the coolant I drained out of it for the next motor
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Originally Posted by yodaddy' post='872242' date='May 17 2007, 04:44 PM
the sad thing is that the builder is well known and a big name. I keep trying to get him to let me do it, but I guess he just doesn't want a nice quality motor https://www.nopistons.com/forums/pub...#>/biggrin.gif |
Originally Posted by BOTTLEFED' post='872253' date='May 17 2007, 05:27 PM
Jed, he's a big-name builder, but not as big as you https://www.nopistons.com/forums/pub...>/rolleyes.gif |
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