Hi Randy , Look's like you stoped running the engine just in time , That piston has just reached the point of collapse though heat . If it had run much longer it would have melted right through . Would copper head gasket work on this , Cheer's Terry
@terence20001 My thoughts exactly terr, now I will tear the engine further apart and look at all the components for other damage symptoms. I found some copper wove abestos gasket material on ebay and some really cheap viton rubber I can make a Killer gasket with. Lucky I found this in time. THanks Mate. RH
AS usual Bro- You are totally correct. I had some great JB weld idea and Now I know that the weld is not good gasket material. I will try something else after much thought and pondering on the situation. THanks again for your great advice and you are always on the money on this. RH
And i bet you that nothing is wrong with the lower end on that motor. If you notice every part of your "slap" is on the rear side of the cylinder which means gravity played a role in whatever was in your motor. If you would of had piston to head interference it would have been obvious when running and a loud clack would have came with it. I bet new pistion and the correct gasket will fix your problem assuming your head and cylinder are still square (flat) on their mating surfaces.
Also the reason your head gasket failed is because head gaskets are intrecatly designed pieces made different for each application and as you explained metal expands as it gets hot. Aluminum expands the most of every type of metal used in motors and the gasket made of JB weld is not going to withstand the stress of the expansion and contraction. Not ragging on you, good for trying.
And the cause of your overheating problem was NOT your radiator or you pumps ect. It was combustion gases getting into the coolant. Will do it 100 percent of the time.
I bet your JB weld gasket broke off and got between the head and the piston causing those pits is my best idea because that stuff really does get like hard metal. The concaving of your piston on the other hand i do not know unless you got too much water into the combustion chamber and when it hit compression it was enough to break that aluminum pistion. If i were you figure out how those O-ring seals are supposed to be measured and get the correct one for your application. Good luck.
my athena racing piston blew a hole rite through
yz100f 10 months ago
It hitted the head and it almost collapsed because of heat, good findings. Thanks for pointing out the symptoms so we can recognize them!
pepijntje 10 months ago
Hi Randy , Look's like you stoped running the engine just in time , That piston has just reached the point of collapse though heat . If it had run much longer it would have melted right through . Would copper head gasket work on this , Cheer's Terry
terence20001 10 months ago
@terence20001 My thoughts exactly terr, now I will tear the engine further apart and look at all the components for other damage symptoms. I found some copper wove abestos gasket material on ebay and some really cheap viton rubber I can make a Killer gasket with. Lucky I found this in time. THanks Mate. RH
DIOSpeedDemon 10 months ago
AS usual Bro- You are totally correct. I had some great JB weld idea and Now I know that the weld is not good gasket material. I will try something else after much thought and pondering on the situation. THanks again for your great advice and you are always on the money on this. RH
DIOSpeedDemon 10 months ago
And i bet you that nothing is wrong with the lower end on that motor. If you notice every part of your "slap" is on the rear side of the cylinder which means gravity played a role in whatever was in your motor. If you would of had piston to head interference it would have been obvious when running and a loud clack would have came with it. I bet new pistion and the correct gasket will fix your problem assuming your head and cylinder are still square (flat) on their mating surfaces.
rebelsoutherner 10 months ago
Also the reason your head gasket failed is because head gaskets are intrecatly designed pieces made different for each application and as you explained metal expands as it gets hot. Aluminum expands the most of every type of metal used in motors and the gasket made of JB weld is not going to withstand the stress of the expansion and contraction. Not ragging on you, good for trying.
rebelsoutherner 10 months ago
And the cause of your overheating problem was NOT your radiator or you pumps ect. It was combustion gases getting into the coolant. Will do it 100 percent of the time.
rebelsoutherner 10 months ago
I bet your JB weld gasket broke off and got between the head and the piston causing those pits is my best idea because that stuff really does get like hard metal. The concaving of your piston on the other hand i do not know unless you got too much water into the combustion chamber and when it hit compression it was enough to break that aluminum pistion. If i were you figure out how those O-ring seals are supposed to be measured and get the correct one for your application. Good luck.
rebelsoutherner 10 months ago
Maybe self-ignition has happend in the engine.. More ocktane fuel or lower compression
rambam78 10 months ago