Subzilla
01-15-2013, 19:34
Got everything unhooked, removed and undone - ready to pluck the engine from the Sub. The engine is suffering from a broken crankshaft.
Decided it was time to remove the 6 bolts holding the transmission to the engine. The 3 bolts on the passenger side are gone! The 3 on the driver's side are in place with the lower bolt tight but the 2 upper ones are not tight at all. One of these appears to be broken and missing a third of the bolt. I probed the holes of the 3 missing bolts and it doesn't appear they have sheared off, I don't think.
As a refresher, when the crankshaft broke, I coasted to a stop but let the engine run for maybe 30 seconds trying to diagnose it. It was violently rocking the vehicle. This transmission was installed some 140k miles ago and I haven't touched the bolts since then.
Question: If the bolts vibrated out, could this have caused some misalignment with the crankshaft causing it to break? I can't imagine a minute of vibration after the crankshaft broke to cause the bolts to back out that quick.
Decided it was time to remove the 6 bolts holding the transmission to the engine. The 3 bolts on the passenger side are gone! The 3 on the driver's side are in place with the lower bolt tight but the 2 upper ones are not tight at all. One of these appears to be broken and missing a third of the bolt. I probed the holes of the 3 missing bolts and it doesn't appear they have sheared off, I don't think.
As a refresher, when the crankshaft broke, I coasted to a stop but let the engine run for maybe 30 seconds trying to diagnose it. It was violently rocking the vehicle. This transmission was installed some 140k miles ago and I haven't touched the bolts since then.
Question: If the bolts vibrated out, could this have caused some misalignment with the crankshaft causing it to break? I can't imagine a minute of vibration after the crankshaft broke to cause the bolts to back out that quick.