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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,238
Originally Posted by TurboKraft View Post

3LDZ turbocharger is officially "obsolete." BorgWarner does not produce bearings or seals for the 3LDZ used on the 1976-89 930 / 911 Turbo engines, and they are long since out of stock on these basic rebuild parts. Once their stock of other spare parts (compressor wheels, etc.) are used up -- that's it.

There are other 3LDZ turbos used on other engines, but their bearing and seal dimensions are not an exact match to those used on the Porsche-specific 3LDZ.

The bearing kits and rebuild kits you see on eBay? Junk, out of spec.
Most of the rebuilds and hybrids? Junk, build on out-of-spec parts.

I know of fewer than a handful of turbo rebuilders who know how to piece together a Genuine BW seal kit and supply correct spec bearings to correctly rebuild our 3LDZ, and it is not cheap. Unless you're restoring an all-original car, or stuck in a "modified stock" class (as the poster above is stating), then it makes no sense to put any money into a 3LDZ.
So what does this mean in regards to the different flavors of k27 turbo that many of us currently own? I mean can you list which turbos are effected by this for example: K27, k27S, k27HF, k27HFS did I miss any or am I listing the wrong turbos all together?
I hate to think that I might as well junk my k27S if it ever wears out and not to rebuild it because of part availability and have to spend lots of Benjamins on a new Garret turbo.
Dam this is a depressing post.
1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, full bay intercooler, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.95 bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 04-19-2012, 01:33 PM
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