https://www.posetteforever.com/viewtopic.php?f=34&t=2158&p=33129#p33129
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Tormie
Saturday, 21 October 2006, 11:51 AM


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:mmmh:  :mmmh: I suppose it's a gasoline engine right ? Here is more commona diesel one and a repair like that with a diesel engine wouldn't work for the higher compression. Honestly I doubt that a repair made with epoxy will last for a long time. Last time I cracked the head of my car (I think for the use of a so called "autogas" conversion, that gas generate more heat than gasoline) I had to carry it to a specialized solder, for large damages like yours I saw that they put a piece of tube in the coolant passage and solder the piece. you won't see any external leak because the pressure of the water is weak compared to the pressure of the oil, the first think that uses to break is the wall between oil an water, then the oil (and gas) passes in the water, if the damage is big you'll see the water "boil" for the gas passing in it (and because it really boils after a while...), if the damage is little you'll see that the engine consume the water, than a check of the color of the oil will show if it has water in it (it contains something like white filaments).

However for the kind of damage I suggest you to find an used head and replace it asap, the head has to be "rectified" (sorry, I don't know the technical translation :oops:) before being put on the engine. 

 :uuh: Actually I've the overpowered engine of my scooter to open and rebuild completely :crybaby: