HPI, I agree this is a bit of BS, a friend of mine that is a diesel turbo tech says Garrett knew they had a plastic bearing cage problem on some of last years releases. If there is an upside, he says that if you get a re-man center section you get a better bearing. Well yippie, that would be nice to have a bearing last more than 1000 miles before you replace it $525 and the oil pump $300 and some shipping and down time. Makes the race gas seem cheap all of a sudden. OK rant over.
On my application I don't think the oil pump played a part. The pics below show the oil supply I had after the bearing failure (with all the pieces still in the system) to the bearing and coming out of the return to tank journal. Bottom line, I had tons of oil flow. Take a look.
Oil supply line
Oil passing through bearing and dropping into tank (pop bottle in this case)
Outlaw, I hope the elements aren't an issue in my failure since my sled lives in a heated trailer and a heated shop while in use. I stored it last year (with turbo on) in a dark corner of the shop where it stays cool with the cover on. It was fogged through the turbo intake before putting it to bed. If the elements pooched me, there are a lot of these in way worse conditions.
I know we have Garretts on our heavy equipment and they sit out in all kinds of weather for years at a time. I think the turbos on equipment or in automotive applications have a way tougher exposure life than mine on my sled.
I did have a BOV in my intercooler last year at install but it leaked boost so I took it off. The guys at BD said that they felt it wasn't needed in a sled application (pump gas) especially as compared to the auto applications that these turbos run well over 100K miles on. 10% of that on a sled will be a milestone. Maybe there is more reliability with a BOV. I hope some more guys who have had bearing failure post up so we can see if there is a trend relating to the BOV. The other thing to consider is I have never gone over 10psi and run most days at 8.
I plan to follow up with Garrett to find out what what type of piece that could pass through the pre-filter (panty hose type material) and the screen could do damage that was not visible to the wheel causing such an imbalance that the bearing let go. That same piece that would have caused that damage also caused no damage to reeds, pistons, cylinders, or exhaust. The short answer will be ice chunk, but with a 40,000 BTU heater in my trailer and a 400,000 BTU heater in my shop that will be a tough sell to me. My clothes are always dry the next morning in my trailer and they dont get to sit next to a hot engine the first hour or two on the trip back. This would have to be some sneaky ice that got past all that and the waterproof pre-filter material. I have never seen ice anywhere inside my engine compartment anyway even on years where I had powder to ride in. Thats sure not the case this year or in the days prior to my bearing failure.
OK rant over for sure this time, I'm gonna go play with my stapler it always works no matter how I treat it.