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Join Date: Mar 2005
Location: Phoenix, AZ
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One other option


If you've got some modified oil tank w/o a fitting (ex: non-Turbo tank) and don't want to add a fitting, another simple option is to return oil back to the crankcase.
Why not? The 993TT did, pumping hot post-turbo oil right back into the case below and to the left of the crankshaft.

FWIW, I've returned oil to the crankcase breather cover and not had a problem. (Cover = oval piece bolted to top of case with 1" fitting on right side for the stainless breather tube). Most case covers with a few ports, and if one is unused then simply thread in the appropriate adapter. Ex: 993 conversion had an M14 port unused, just installed an M14/-6AN adapter, then a -6AN line up form the pump. Short & simple. And if your cover doesn't have an available port, add one -- it's thick enough to either TIG on an aluminum bung, or, drill & tap (straight thread or NPT).

We had a car in the shop not long ago that had an AN bung welded to a lower valve cover and the oil returned there, next to a lower rocker and right down the oil return tube. Worked fine.

Just another way to get it done.
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: -
Old 04-08-2011, 07:55 PM
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