AK AL

I hear the engine has to be pulled to do the job ,could this be a possible nightmare?

LCP

was the total bill for my replacement, which included both turbos, labor, some new sensors, a new rightside precat, etc. If you think you just blew a turbo, stop driving IMMEDIATELY. This may save a few of the sensors and the precat and knock a grand off of the repair job.

DWC_2.7T

I figure if the turbos go 50K without failing, they should last as long as anything else on the engine as long as I keep the oil clean or unless I start driving very differently. BTW, my son drives my old M/B 300D Turbo with 320,000 miles on it; never had a turbo failure. And the turbos on the 2.7 are a couple generations later in technology.

LCP

...but they're not the same K03 as in the 1.8T, and in the last few months, the 2.7T's K03's have been upgraded to a new part number that will flow more oil than the one it replaces. Now that I have the upgraded turbos, I hope that the S4 makes it the 100,000 miles as I originally intended when I bought it without any other serious repair.

DWC_2.7T

Yeah, but S4 drivers never drive under 5000rpm

Bollinger

All you know is there is a new part number. You don't know what was changed. You are making stuff up. For all you know, the new part is inferior but cheaper to produce.

moyles

I dont think the S4 people who blew turbos and had the new parts to inspect and saw the larger passeges for themselves consider it a rumor. You dont think the new TBB and clamps are a rumor also I hope?

LCP

...and compared it to an old turbo; call APR if you want to talk in more detail about it. I thought they even posted an advisory a few weeks ago in the S4 forum that all 2.7T owners upgrade their turbos to the revised models, but I can't find it now (maybe it was just Garrett suggesting that all owners upgrade the oil lines or maybe it was edited). Here's a link to a short post of theirs.<ul><li><a href="https://www.audiworld.com/forum/m.new/s4/msgs/153107.phtml">https://www.audiworld.com/forum/m.new/s4/msgs/153107.phtml</a</li></ul>

Bollinger

Most of the info comes from "Innovator" who saw his engine sitting in a harness to be dropped in his car. Other info comes from some who looked at parts.

Larger oil passages doesn't necessarily mean higher oil flow. Just as larger exhaust pipes doesn't mean more exhaust flow. Larger oil passages can actually mean less heat is carried away, as the oil will move slower though the larger passages and so not wisk the heat away as fast.

Ask the designers of the new parts what the changes were for. That's the only way to know why there is a new part. The most common reason to supercede a part is to lower the cost (presumably at same quality), not to make it better.

DWC_2.7T

Increased oil passage bore = more volume + larger surface area for heat transfer = more heat removed.