Exactly the plan. That's why I asked how thick the crown is.Turn the engine over push it back up and a few self tappers in it to get a hold of, I bet you can pull it out.
The bottom has to come off anyway, I was saying take it out from what you had as you had something to get hold of.
Plus then we can all see whats happened.
J
Agree a self tapper bolt with the cutting bit on the end drilled in then a claw hammer and a block of wood to ease it up would be the way I would go...Turn the engine over push it back up and a few self tappers in it to get a hold of, I bet you can pull it out.
The bottom has to come off anyway, I was saying take it out from what you had as you had something to get hold of.
Plus then we can all see whats happened
J
Nope, no melting or any other classic stuff. The rest have a little coke build-up and nothing else, and there is almost no discernible bore wear or a lip that might catch. When I get the piston out I'll know more....
See below! Conrod seems fine.Apart from the initial bang was it noisy? As in death rattle, spinny things thrashing the insides to pieces type of noise. If the little end broke I would expect ALOT of noise and the engine to be scrap but if it snapped around the wrist bit at the big end then it could be OK. Piston gets stuck at the top so the remains of the conrod are out of the way of the crank and the rest is still attached to the crank.
I need to know, get out there now and take it apart
Yeah, I was thinking that. It should be smack on standard, whatever that is, but I shall check. If it's been detonating/over advanced I'll replace all four pistons, but at the moment I don't see any evidence for that. The dizzy is reputable, new-ish, and electronic.
Indeed - but very low usage and no audible pinking.
You will be able to answer that better when you get both bits out, most likely initiated as creep forming a small crack which propagated to a bigger crack until bang!
Looking at the piston, it seems like one quadrant has been fractured at the top ring groove for some time before the final failure. See the pics below.
It's been running quite rich judging by the plugs/crowns/valves.
So how confident the others are not the same?
