I've got a 14 5.3 at the shop that absolutely grenaded. Probably the worst I've ever seen. Broke the block from head to head on the back 2 cylinders, broke both heads, blew the upper oil pan in two all the way to the balancer , broke the starter, broke the bellhousing and case on the transmission, broke 2 torque cover bolts, broke the ac compressor, ripped the wiring harness in two.
I've never seen anything like it.
A dealer in Minnesota claimed it was the afm that caused it, said the valves must have worked when they weren't supposed to and allowed fuel to get into those cylinders and it exploded.
Originally Posted by SAUTO:
I've got a 14 5.3 at the shop that absolutely grenaded. Probably the worst I've ever seen. Broke the block from head to head on the back 2 cylinders, broke both heads, blew the upper oil pan in two all the way to the balancer , broke the starter, broke the bellhousing and case on the transmission, broke 2 torque cover bolts, broke the ac compressor, ripped the wiring harness in two.
I've never seen anything like it.
A dealer in Minnesota claimed it was the afm that caused it, said the valves must have worked when they weren't supposed to and allowed fuel to get into those cylinders and it exploded.