Well, I finally "manned up" and pulled the pan off the old engine from the Avanti.
For those who haven't been following this saga, I bought this car over 2 years ago as a non-running garage find. Once I got it running and started to work on the details, I realized that there was something deeply wrong. I bought a cheapie bore scope from Harbor Fright and found a deep grove on the #8 cylinder. The past year has been spent building a second engine and swapping it in for the original.
As assumed, the wrist pin lock bolt lost its nut. I found that in the pan. Why the lock pin didn't wipe out the piston skirt and cylinder is interesting. Check out these pics;
So, that's what i found inside. I shot pics of the failed #8 cylinder as well as its neighbor 6 for those who are unfamiliar with what the nut and pinch bolt look like. Something's missing, huh?!
So, the bolt only brushed the skirt. I understand that normally these hit the skirt and blow out skirt and cylinder. Clearly luck was on my side and unrepairable didn't yet happen only because the bolt wore in such a way as to be trapped by the wrist pin. Someday though that luck would have run out. BTW, how do you like the windage tray? Look closely and you'll notice where the #7 rod bolt hit the nut and rolled it against the pan, bending it.
Now to do the financial forensics...where's the whiskey?
For those who haven't been following this saga, I bought this car over 2 years ago as a non-running garage find. Once I got it running and started to work on the details, I realized that there was something deeply wrong. I bought a cheapie bore scope from Harbor Fright and found a deep grove on the #8 cylinder. The past year has been spent building a second engine and swapping it in for the original.
As assumed, the wrist pin lock bolt lost its nut. I found that in the pan. Why the lock pin didn't wipe out the piston skirt and cylinder is interesting. Check out these pics;
So, that's what i found inside. I shot pics of the failed #8 cylinder as well as its neighbor 6 for those who are unfamiliar with what the nut and pinch bolt look like. Something's missing, huh?!
So, the bolt only brushed the skirt. I understand that normally these hit the skirt and blow out skirt and cylinder. Clearly luck was on my side and unrepairable didn't yet happen only because the bolt wore in such a way as to be trapped by the wrist pin. Someday though that luck would have run out. BTW, how do you like the windage tray? Look closely and you'll notice where the #7 rod bolt hit the nut and rolled it against the pan, bending it.
Now to do the financial forensics...where's the whiskey?
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