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TurboKraft TurboKraft is offline
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Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,656
Perform a simple scavenge pump test. The process has been covered many times on this forum, but the short form is this:
* allow the turbo to drain into a container
* extend the scavenge line, stick the free end into the container
* start the engine
Oil should be scavenged out of the container faster than the oil drains our of the turbo, at all rpms.
We have seen used pumps work at idle and not at revs, and vice versa.
It is not uncommon during a turbo swap to have to remove the scav pump an install new seals (cover, shaft), as well as replace (or thoroughly de-carbon) the oil line into the turbocharger.

TurboKraft sells new braided PTFE/stainless oil feed lines for the 930s to replace the stock ones that leak where crimped, but the check ball is retained at the case's oil fitting, and there is no restrictor used with 3K-Warner or other journal bearing turbochargers.

If the pump is good, it's your turbocharger.
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: -
Old 06-14-2013, 02:55 PM
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